1.创建一个web工程

2.导入jar包

3.创建Student表

4.创建实体类

  1. package com.entity;
  2.  
  3. public class Student {
  4.     private Integer sid;
  5.     private String sname;
  6.     private String password;
  7.     private String sex;
  8.     private Integer cid;
  9.  
  10.     public Student() {
  11.     }
  12.     public Student(Integer sid, String sname, String password, String sex,
  13.             Integer cid) {
  14.         this.sid = sid;
  15.         this.sname = sname;
  16.         this.password = password;
  17.         this.sex = sex;
  18.         this.cid = cid;
  19.     }
  20.     public Student(String sname, String password, String sex,
  21.             Integer cid) {
  22.         this.sname = sname;
  23.         this.password = password;
  24.         this.sex = sex;
  25.         this.cid = cid;
  26.     }
  27.     public Integer getSid() {
  28.         return sid;
  29.     }
  30.     public void setSid(Integer sid) {
  31.         this.sid = sid;
  32.     }
  33.     public String getSname() {
  34.         return sname;
  35.     }
  36.     public void setSname(String sname) {
  37.         this.sname = sname;
  38.     }
  39.     public String getPassword() {
  40.         return password;
  41.     }
  42.     public void setPassword(String password) {
  43.         this.password = password;
  44.     }
  45.     public String getSex() {
  46.         return sex;
  47.     }
  48.     public void setSex(String sex) {
  49.         this.sex = sex;
  50.     }
  51.     public Integer getCid() {
  52.         return cid;
  53.     }
  54.     public void setCid(Integer cid) {
  55.         this.cid = cid;
  56.     }
  57.     @Override
  58.     public String toString() {
  59.         return "Student [cid=" + cid + ", password=" + password + ", sex="
  60.                 + sex + ", sid=" + sid + ", sname=" + sname + "]";
  61.     }
  62.  
  63. }

5.配置映射文件

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
  3. <hibernate-mapping>
  4.     <!--1.实体类的字段和数据库的字段一一映射
  5.         name:实体类的全名
  6.         table:对应的数据库表名,默认值为类名
  7.     -->
  8.    <class name="com.entity.Student" table="STUDENT">
  9.  
  10.    <!--1.1主键配置
  11.           id:对应表中的主键
  12.           name:实体类中的属性名
  13.        type:主键属性的数据类型
  14.        column:属性名对应表的字段名,默认值为属性名-->
  15.        <id name="sid" type="java.lang.Integer" column="SID">
  16.  
  17.              <!--generator:为持久化实例产生一个唯一标识-->
  18.           <generator class="sequence">
  19.  
  20.               <!--数据库的序列名-->
  21.             <param name="sequence">SEQ_STUDENT</param>
  22.           </generator>
  23.        </id>
  24.  
  25.        <!--1.2普通字段配置-->
  26.        <property name="sname" type="java.lang.String" column="SNAME"/>
  27.        <property name="password" type="java.lang.String" column="PASSWORD"/>
  28.        <property name="sex" type="java.lang.String" column="SEX"/>
  29.        <property name="cid" type="java.lang.Integer" column="CID"/>
  30.    </class>
  31. </hibernate-mapping>

6.配置主配置文件

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd" >
  3. <hibernate-configuration>
  4.  
  5.   <!--通常一个session-factory节点代表一个数据库-->
  6.   <session-factory>
  7.       <!--1.配置数据库的驱动-->
  8.     <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
  9.  
  10.     <!--2.配置数据库的url地址-->
  11.     <property name="connection.url">jdbc:oracle:thin:@127.0.0.1:1521:orcl</property>
  12.  
  13.     <!--3,配置数据库的username-->
  14.     <property name="connection.username">holly</property>
  15.  
  16.        <!--4.配置数据库的密码-->
  17.     <property name="connection.password">sys</property>
  18.  
  19.     <!--5.配置数据库的方言-->
  20.     <property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>
  21.  
  22.     <!--6.显示sql语句-->
  23.     <property name="show_sql">true</property>
  24.  
  25.     <!--7.sql语句格式化-->
  26.     <property name="format_sql">true</property>
  27.  
  28.     <!--8.加载映射文件-->
  29.     <mapping resource="com/entity/Student.hbm.xml"/>
  30.   </session-factory>
  31. </hibernate-configuration>

7.创建一个工具类

  1. package com.util;
  2.  
  3. import org.hibernate.HibernateException;
  4. import org.hibernate.Session;
  5. import org.hibernate.SessionFactory;
  6. import org.hibernate.cfg.Configuration;
  7.  
  8. /**
  9.  * Hibernate打开session和关闭session的工具包
  10.  * @author Holly
  11.  *
  12.  */
  13. public class Hibernate_Util {
  14.     private static ThreadLocal<Session> threadLocal=new ThreadLocal<Session>();
  15.     private static Configuration configuration=null;
  16.     private static SessionFactory sessionFactory=null;
  17.     static{
  18.  
  19.      try {
  20.         configuration=new Configuration().configure("/hibernate.cfg.xml");
  21.         sessionFactory=configuration.buildSessionFactory();
  22.      } catch (HibernateException e) {
  23.          System.out.println("解析xml和创建Session工厂error");
  24.         e.printStackTrace();
  25.     }
  26.  
  27.     }
  28.  
  29.     public static Session getSession(){
  30.         Session session=threadLocal.get();
  31.         if(session==null){
  32.             session=sessionFactory.openSession();
  33.             threadLocal.set(session);
  34.         }
  35.         return session;
  36.     }
  37.     public static void closeSession(){
  38.         Session session=threadLocal.get();
  39.         if(session!=null){
  40.               threadLocal.set(null);
  41.               session.close();
  42.         }
  43.     }
  44.  
  45. }

8.创建分页实体类

  1. package com.page;
  2.  
  3. public class Page {
  4.     private Integer pagesize; //页面大小
  5.     private Integer pageno; //当前页
  6.     private Integer startrow; //起始行
  7.     private Integer totalpage; //总页数
  8.     private Integer totalcount; //总条数
  9.  
  10.     public Page() {
  11.     }
  12.     public Page(Integer pageSize, Integer pageNo, Integer totalCount) {
  13.         this.pagesize = pageSize; //页面大小
  14.         this.pageno = pageNo;  //当前页
  15.         this.totalcount = totalCount; //计算总条数
  16.         this.setStartrow(pageNo, pageSize); //计算起始行
  17.         this.setTotalpage(totalCount, pageSize); //计算总页数
  18.     }
  19.     public Integer getPagesize() {
  20.         return pagesize;
  21.     }
  22.     public void setPagesize(Integer pageSize) {
  23.         this.pagesize = pageSize;
  24.     }
  25.     public Integer getPageno() {
  26.         return pageno;
  27.     }
  28.     public void setPageno(Integer pageNo) {
  29.         this.pageno = pageNo;
  30.     }
  31.     public Integer getStartrow() {
  32.         return startrow;
  33.     }
  34.     /**
  35.      * 计算起始行
  36.      * @param pageNo
  37.      * @param pageSize
  38.      */
  39.     public void setStartrow(Integer pageNo,Integer pageSize) {
  40.         this.startrow = (pageNo-1)*pageSize;
  41.     }
  42.     public Integer getTotalpage() {
  43.         return totalpage;
  44.     }
  45.     /**
  46.      * 计算总页数
  47.      * @param totalCount
  48.      * @param pageSize
  49.      */
  50.     public void setTotalpage(Integer totalCount,Integer pageSize) {
  51.         this.totalpage = totalCount%pageSize==0?totalCount/pageSize:totalCount/pageSize+1;
  52.     }
  53.     public Integer getTotalcount() {
  54.         return totalcount;
  55.     }
  56.     public void setTotalCount(Integer totalCount) {
  57.         this.totalcount = totalCount;
  58.     }
  59.     @Override
  60.     public String toString() {
  61.         return "[{\"pageno\":" + pageno + ",\"pagesize\":" + pagesize
  62.                 + ",\"startrow\":" + startrow + ",\"totalcount\":" + totalcount
  63.                 + ",\"totalpage\":" + totalpage + "}]";
  64.     }
  65.  
  66. }

9.创建Dao类

  1. package com.dao;
  2.  
  3. import java.util.List;
  4.  
  5. import com.entity.Student;
  6. import com.page.Page;
  7.  
  8. public interface StudentDao {
  9.     /**
  10.      * 1.根据用户名和密码查询
  11.      * @param sname
  12.      * @param password
  13.      * @return
  14.      */
  15.     Student findByNameAndPwd(String sname,String password);
  16.     /**
  17.      * 2.延时加载:查询所有
  18.      * @return
  19.      */
  20.     List<Student> findAll();
  21.     /**
  22.      * 3.保存
  23.      * @param stu
  24.      * @return
  25.      */
  26.     int save(Student stu);
  27.     /**
  28.      * 4.根据主键id查询单条
  29.      * @param sid
  30.      * @return
  31.      */
  32.     Student findById(Integer sid);
  33.     /**
  34.      * 5.修改
  35.      */
  36.     int update(Student stu);
  37.     /**
  38.      * 6.删除对象
  39.      * @param stu
  40.      * @return
  41.      */
  42.     int delete(Student stu);
  43.     /**
  44.      * 7.分页查询
  45.      */
  46.     List<Student> findPage(Page page);
  47.     /**
  48.      * 8.查询总条数
  49.      */
  50.     int getTotalCount();
  51.  
  52. }

10.实现Dao接口

  1. package com.dao.impl;
  2.  
  3. import java.util.List;
  4.  
  5. import org.hibernate.HibernateException;
  6. import org.hibernate.Query;
  7. import org.hibernate.Session;
  8.  
  9. import com.dao.StudentDao;
  10. import com.entity.Student;
  11. import com.page.Page;
  12. import com.util.Hibernate_Util;
  13.  
  14. public class StudentDaoImpl implements StudentDao{
  15.     /**
  16.      * 1.查询所有:立即加载
  17.      */
  18.     public List<Student> findAll() {
  19.         //1.获取session对象
  20.         Session session=Hibernate_Util.getSession();
  21.         //2.定义hql语句
  22.         String hql="from Student";
  23.         //3.Session创建Query对象
  24.         Query query=session.createQuery(hql);
  25.         //4.query对象执行操作
  26.         List<Student> it=query.list();
  27.         //5.释放资源
  28.         Hibernate_Util.closeSession();
  29.         return it;
  30.     }
  31.     /**
  32.      * 2.根据用户名和密码查询
  33.      */
  34.     public Student findByNameAndPwd(String sname, String password) {
  35.         //1.获取session对象
  36.         Session session=Hibernate_Util.getSession();
  37.         //2.定义hql语句(命名参数)
  38.         String hql="from Student where sname=:sname and password=:password";
  39.         //3.Session创建Query对象
  40.         Query query=session.createQuery(hql);
  41.         //4.query对象给占位符赋值
  42.         /*query.setString("sname", sname);
  43.         query.setString("password", password);*/
  44.         query.setParameter("sname", sname);
  45.         query.setParameter("password", password);
  46.  
  47. //        query.setProperties(user);
  48.         //5.执行操作(uniqueResult()查询的单行数据)
  49.         Student stu=(Student) query.uniqueResult();
  50.         //6.释放资源
  51.         Hibernate_Util.closeSession();
  52.         return stu;
  53.  
  54.     }
  55.  
  56.    /**
  57.     * 根据id主键查询单条
  58.     */
  59.     public Student findById(Integer sid) {
  60.         //1.获取session对象
  61.         Session session=Hibernate_Util.getSession();
  62.         //2.利用session根据主键查询
  63.         Student stu=(Student) session.get(Student.class, sid);
  64.         /*3.
  65.          * 因为在修改时要提前查询单条,和session关联已经变成持久化对象,
  66.          * 而在修改时session执行update方法时,
  67.          * 首先会查询该主键id是否存在,
  68.          * 如果存在,则根据主键id修改该对象,此时对象已经处于持久化对象,
  69.          * 而实际session中不能同时存在两个主键id相同的对象,
  70.          * 否则会出现如下错误:
  71.          * org.hibernate.NonUniqueObjectException:
  72.          * a different object with the same identifier
  73.          * value was already associated with the
  74.          * session: [com.entity.Student#1]
  75.          */
  76.           Hibernate_Util.closeSession();
  77.          // session.clear();
  78.         return stu;
  79.     }
  80.     /**
  81.      * 删除对象
  82.      */
  83.     public int delete(Student stu) {
  84.         int num=1;
  85.         //1.获取session对象
  86.         Session session=Hibernate_Util.getSession();
  87.  
  88.         try {
  89.             //session删除操作
  90.             session.delete(stu);
  91.             session.beginTransaction().commit();
  92.         } catch (HibernateException e) {
  93.              num=0;
  94.             // TODO Auto-generated catch block
  95.             e.printStackTrace();
  96.         }finally{
  97.             //5.释放资源
  98.             Hibernate_Util.closeSession();
  99.         }
  100.  
  101.         return num;
  102.     }
  103.     /**
  104.      * 添加
  105.      */
  106.     public int save(Student stu) {
  107.         int num=1;
  108.         //1.获取session对象
  109.         Session session=Hibernate_Util.getSession();
  110.         //执行操作
  111.         try {
  112.             session.save(stu);
  113.             session.beginTransaction().commit();
  114.         } catch (HibernateException e) {
  115.             num=0;
  116.             e.printStackTrace();
  117.         }finally{
  118.             //5.释放资源
  119.             Hibernate_Util.closeSession();
  120.         }
  121.         return num;
  122.     }
  123.    /**
  124.     * 修改
  125.     */
  126.     public int update(Student stu) {
  127.         int num=1;
  128.         //1.获取session对象
  129.         Session session=Hibernate_Util.getSession();
  130.         try {
  131.             //执行操作
  132.             //该对象的主键id必须存在
  133.             session.update(stu);
  134.             session.beginTransaction().commit();
  135.         } catch (HibernateException e) {
  136.             num=0;
  137.             e.printStackTrace();
  138.         }finally{
  139.             //5.释放资源
  140.             Hibernate_Util.closeSession();
  141.         }
  142.         return num;
  143.     }
  144.     /**
  145.      * 7.分页查询
  146.      */
  147. public List<Student> findPage(Page page) {
  148.     //1.获取session
  149.     Session session=Hibernate_Util.getSession();
  150.  
  151.     //2.定义查询最大记录数的hql
  152.     String hql="from Student";
  153.  
  154.     //3.定义查询最大记录数的Query对象
  155.     Query querypage=session.createQuery(hql);
  156.  
  157.     //4.查询最大记录数的数据
  158.     querypage.setMaxResults(page.getPagesize());
  159.  
  160.     //5.确定查询起点
  161.     querypage.setFirstResult(page.getStartrow());
  162.  
  163.     //6.分页查询
  164.     List<Student> list=querypage.list();
  165.  
  166.     //7.关闭session
  167.     Hibernate_Util.closeSession();
  168.  
  169.     return list;
  170. }
  171. /**
  172.  * 8.查询总条数
  173.  */
  174. public int getTotalCount() {
  175.     //1.获取session
  176.     Session session=Hibernate_Util.getSession();
  177.  
  178.     //2.定义查询总条数hql语句
  179.     String hqlcount="select count(*) from Student";
  180.  
  181.     //3.利用Session创建Query对象
  182.     Query querycount=session.createQuery(hqlcount);
  183.  
  184.     //4.获取总条数(返回单行数据uniqueResult())
  185.     Integer totalCount=Integer.parseInt(querycount.uniqueResult().toString());
  186.     //5.释放资源
  187.     Hibernate_Util.closeSession();
  188.     return totalCount;
  189. }
  190.  
  191. }

11.创建业务层的接口

  1. package com.service;
  2.  
  3. import java.util.List;
  4.  
  5. import com.entity.Student;
  6. import com.page.Page;
  7.  
  8. /**
  9.  * 业务接口
  10.  * @author pc
  11.  *
  12.  */
  13. public interface StudentService {
  14.     /**
  15.      * 1.登录的业务
  16.      * @param sname
  17.      * @param password
  18.      * @return
  19.      */
  20.     Student login(String sname,String password);
  21.     /**
  22.      * 2.注册
  23.      * @param stu
  24.      * @return
  25.      */
  26.     int register(Student stu);
  27.  
  28.     /**
  29.      * 3.查询所有
  30.      */
  31.     List<Student> findAll();
  32.     /**
  33.      * 4.根据主键id查询
  34.      * @param sid
  35.      * @return
  36.      */
  37.     Student findById(Integer sid);
  38.     /**
  39.      * 5.修改
  40.      */
  41.     int update(Student stu);
  42.     /**
  43.      * 6.删除
  44.      */
  45.     int delete(Student stu);
  46.  
  47.     /**
  48.      * 7.分页查询
  49.      */
  50.     List<Student> findPage(Page page);
  51.     /**
  52.      * 8.查询总条数
  53.      */
  54.     int getTotalCount();
  55.  
  56. }

12.实现业务层接口

  1. package com.service.impl;
  2.  
  3. import java.util.List;
  4.  
  5. import com.dao.StudentDao;
  6. import com.dao.impl.StudentDaoImpl;
  7. import com.entity.Student;
  8. import com.page.Page;
  9. import com.service.StudentService;
  10.  
  11. public class StudentServiceImpl implements StudentService {
  12.     /**
  13.      * 使用多态引用数据访问层对象
  14.      */
  15.     private StudentDao dao = new StudentDaoImpl();
  16.  
  17.     /**
  18.      * 登录
  19.      */
  20.     public Student login(String sname, String password) {
  21.         return dao.findByNameAndPwd(sname, password);
  22.     }
  23.  
  24.     public int delete(Student stu) {
  25.         // TODO Auto-generated method stub
  26.         return dao.delete(stu);
  27.     }
  28.  
  29.     public List<Student> findAll() {
  30.         // TODO Auto-generated method stub
  31.         return dao.findAll();
  32.     }
  33.  
  34.     public Student findById(Integer sid) {
  35.         // TODO Auto-generated method stub
  36.         return dao.findById(sid);
  37.     }
  38.  
  39.     public int register(Student stu) {
  40.         // TODO Auto-generated method stub
  41.         return dao.save(stu);
  42.     }
  43.  
  44.     public int update(Student stu) {
  45.         // TODO Auto-generated method stub
  46.         return dao.update(stu);
  47.     }
  48.  
  49.     public List<Student> findPage(Page page) {
  50.         // TODO Auto-generated method stub
  51.         return dao.findPage(page);
  52.     }
  53.  
  54.     public int getTotalCount() {
  55.         // TODO Auto-generated method stub
  56.         return dao.getTotalCount();
  57.     }
  58.  
  59. }

13.创建Servlet类

Servlet类里的增删改查我是分开写的,所以就不一一粘贴代码,这里只粘贴部分

  1. package com.servlet;
  2.  
  3. import java.io.IOException;
  4.  
  5. import javax.servlet.ServletException;
  6. import javax.servlet.http.HttpServlet;
  7. import javax.servlet.http.HttpServletRequest;
  8. import javax.servlet.http.HttpServletResponse;
  9.  
  10. import com.entity.Student;
  11. import com.service.StudentService;
  12. import com.service.impl.StudentServiceImpl;
  13.  
  14. public class RegisterServlet extends HttpServlet {
  15.     private static final long serialVersionUID = 1L;
  16.  
  17.     public void doGet(HttpServletRequest request, HttpServletResponse response)
  18.             throws ServletException, IOException {
  19.  
  20.         this.doPost(request, response);
  21.     }
  22.  
  23.     public void doPost(HttpServletRequest request, HttpServletResponse response)
  24.             throws ServletException, IOException {
  25.         request.setCharacterEncoding("UTF-8");
  26.         response.setCharacterEncoding("UTF-8");
  27.         response.setContentType("text/html;charset=UTF-8");
  28.  
  29.         // 2.接受参数
  30.         String sname = request.getParameter("sname");
  31.         String password = request.getParameter("password");
  32.         String sex = request.getParameter("sex");
  33.         Integer cid = Integer.valueOf(request.getParameter("cid"));
  34.         Student stu = new Student(sname, password, sex, cid);
  35.  
  36.         // 3.业务处理
  37.         StudentService service = new StudentServiceImpl();
  38.         int num = service.register(stu);
  39.         if (num > 0) {
  40.             System.out.println("register success!");
  41.             response.sendRedirect("FindAllServlet");
  42.         } else {
  43.             System.out.println("register fail!");
  44.  
  45.         }
  46.  
  47.     }
  48.  
  49. }
  1. package com.servlet;
  2.  
  3. import java.io.IOException;
  4. import java.io.PrintWriter;
  5. import java.util.List;
  6.  
  7. import javax.servlet.ServletException;
  8. import javax.servlet.http.HttpServlet;
  9. import javax.servlet.http.HttpServletRequest;
  10. import javax.servlet.http.HttpServletResponse;
  11.  
  12. import org.codehaus.jackson.map.ObjectMapper;
  13.  
  14. import com.entity.Student;
  15. import com.page.Page;
  16. import com.service.StudentService;
  17. import com.service.impl.StudentServiceImpl;
  18.  
  19. /**
  20.  * 分页查询
  21.  *
  22.  * @author pc
  23.  *
  24.  */
  25. public class FindPageServlet extends HttpServlet {
  26.     private static final long serialVersionUID = 1L;
  27.  
  28.     public void doGet(HttpServletRequest request, HttpServletResponse response)
  29.             throws ServletException, IOException {
  30.  
  31.         this.doPost(request, response);
  32.     }
  33.  
  34.     public void doPost(HttpServletRequest request, HttpServletResponse response)
  35.             throws ServletException, IOException {
  36.         response.setContentType("text/html;charset=UTF-8");
  37.         request.setCharacterEncoding("UTF-8");
  38.         response.setCharacterEncoding("UTF-8");
  39.         /**
  40.          * ☆
  41.          * 在使用ajax往前台通过输出流对象的print方法发送json时
  42.          * 该行获取输出流对象的代码必须放在
  43.          * response.setContentType("text/html;charset=UTF-8");
  44.          * 之后,否则ajax回调时,页面拿到的中文数据就永远都是乱码,
  45.          * 原因是:如果将改行代码写在处理客户端乱码之前,表示编码格式已经确定,
  46.          * 所以,编码格式的处理应该放在获取PrintWriter对象之前
  47.          *
  48.          */
  49.         PrintWriter out=response.getWriter();
  50.  
  51.         // 2.接受参数
  52.         String no=request.getParameter("pageNo");
  53.  
  54.         // 3.业务处理
  55.         StudentService service = new StudentServiceImpl();
  56.  
  57.         int pageSize=3; //页面大小
  58.         int pageNo=1; //默认的pageNo为1
  59.         if(no!=null && no!=""){
  60.             pageNo=Integer.valueOf(no);
  61.         }
  62.         //获取总条数
  63.         int totalCount=service.getTotalCount();
  64.         //封装分页所需字段
  65.         Page page=new Page(pageSize, pageNo, totalCount);
  66.         //分页查询
  67.         List<Student> list = service.findPage(page);
  68.  
  69.         ObjectMapper om=new ObjectMapper();
  70.         String str=om.writeValueAsString(list);
  71.         String pagestr=om.writeValueAsString(page);
  72.         str="{\"page\":"+pagestr+",\"list\":"+str+"}";
  73.         System.out.println(str);
  74.  
  75.         out.print(str);
  76.         /*if (list != null) {
  77.             System.out.println("find page success");
  78.             request.setAttribute("list", list);
  79.             request.setAttribute("page", page);
  80.             request.getRequestDispatcher("index.jsp").forward(request, response);
  81.         } else {
  82.             System.out.println("find page fail!");
  83.  
  84.         }*/
  85.  
  86.     }
  87.  
  88. }
  1. package com.servlet;
  2.  
  3. import java.io.IOException;
  4. import java.io.PrintWriter;
  5. import java.util.List;
  6.  
  7. import javax.servlet.ServletException;
  8. import javax.servlet.http.HttpServlet;
  9. import javax.servlet.http.HttpServletRequest;
  10. import javax.servlet.http.HttpServletResponse;
  11.  
  12. import com.entity.Student;
  13. import com.page.Page;
  14. import com.service.StudentService;
  15. import com.service.impl.StudentServiceImpl;
  16.  
  17. public class FindAllServlet extends HttpServlet {
  18.     private static final long serialVersionUID = 1L;
  19.  
  20.     public void doGet(HttpServletRequest request, HttpServletResponse response)
  21.             throws ServletException, IOException {
  22.  
  23.        this.doPost(request, response);
  24.     }
  25.  
  26.     public void doPost(HttpServletRequest request, HttpServletResponse response)
  27.             throws ServletException, IOException {
  28.         request.setCharacterEncoding("UTF-8");
  29.         response.setCharacterEncoding("UTF-8");
  30.         response.setContentType("text/html;charset=UTF-8");
  31.  
  32.         /**
  33.          * ☆
  34.          * 在使用ajax往前台通过输出流对象的print方法发送json时
  35.          * 该行获取输出流对象的代码必须放在
  36.          * response.setContentType("text/html;charset=UTF-8");
  37.          * 之后,否则ajax回调时,页面拿到的中文数据就永远都是乱码,
  38.          * 原因是:如果将改行代码写在处理客户端乱码之前,表示编码格式已经确定,
  39.          * 所以,编码格式的处理应该放在获取PrintWriter对象之前
  40.          *
  41.          */
  42.  
  43.         // 2.接受参数
  44.         String no=request.getParameter("pageNo");
  45.  
  46.         // 3.业务处理
  47.         StudentService service = new StudentServiceImpl();
  48.  
  49.         int pageSize=3; //页面大小
  50.         int pageNo=1; //默认的pageNo为1
  51.         if(no!=null && no!=""){
  52.             pageNo=Integer.valueOf(no);
  53.         }
  54.         //获取总条数
  55.         int totalCount=service.getTotalCount();
  56.         Page page=new Page(pageSize, pageNo, totalCount);
  57.  
  58.         List<Student> list = service.findPage(page);
  59.         if(list!=null){
  60.              System.out.println("find All page success");
  61.               request.setAttribute("list", list);
  62.               request.setAttribute("page", page);
  63.               request.getRequestDispatcher("index.jsp").forward(request, response);
  64.         }else{
  65.             System.out.println("find All page fail!");
  66.         }
  67.     }    
  68.  
  69.     }

代码

  1. package com.servlet;
  2.  
  3. import java.io.IOException;
  4.  
  5. import javax.servlet.ServletException;
  6. import javax.servlet.http.HttpServlet;
  7. import javax.servlet.http.HttpServletRequest;
  8. import javax.servlet.http.HttpServletResponse;
  9.  
  10. import com.entity.Student;
  11. import com.service.StudentService;
  12. import com.service.impl.StudentServiceImpl;
  13.  
  14. public class LoginServlet extends HttpServlet {
  15.     private static final long serialVersionUID = 1L;
  16.  
  17.     public void doGet(HttpServletRequest request, HttpServletResponse response)
  18.             throws ServletException, IOException {
  19.  
  20.        this.doPost(request, response);
  21.     }
  22.  
  23.     public void doPost(HttpServletRequest request, HttpServletResponse response)
  24.             throws ServletException, IOException {
  25.         request.setCharacterEncoding("UTF-8");
  26.         response.setCharacterEncoding("UTF-8");
  27.         response.setContentType("text/html;charset=UTF-8");
  28.  
  29.         //2.接受参数
  30.         String sname=request.getParameter("sname");
  31.         String password=request.getParameter("password");
  32.         //3.业务处理
  33.         StudentService service=new StudentServiceImpl();
  34.         Student stu=service.login(sname, password);
  35.         if(stu!=null){
  36.             System.out.println("login success!");
  37.             //4.页面跳转
  38.             request.getSession().setAttribute("sname", sname);
  39.             response.sendRedirect("FindAllServlet");
  40.         }else{
  41.             System.out.println("login fail!");
  42.  
  43.         }
  44.     }
  45.  
  46. }
  1. package com.servlet;
  2.  
  3. import java.io.IOException;
  4.  
  5. import javax.servlet.ServletException;
  6. import javax.servlet.http.HttpServlet;
  7. import javax.servlet.http.HttpServletRequest;
  8. import javax.servlet.http.HttpServletResponse;
  9.  
  10. import com.entity.Student;
  11. import com.service.StudentService;
  12. import com.service.impl.StudentServiceImpl;
  13. import com.util.Hibernate_Util;
  14.  
  15. public class FindByIdSerlvet extends HttpServlet {
  16.     private static final long serialVersionUID = 1L;
  17.  
  18.     public void doGet(HttpServletRequest request, HttpServletResponse response)
  19.             throws ServletException, IOException {
  20.  
  21.         this.doPost(request, response);
  22.     }
  23.  
  24.     public void doPost(HttpServletRequest request, HttpServletResponse response)
  25.             throws ServletException, IOException {
  26.         request.setCharacterEncoding("UTF-8");
  27.         response.setCharacterEncoding("UTF-8");
  28.         response.setContentType("text/html;charset=UTF-8");
  29.  
  30.         // 2.接受参数
  31.         Integer sid=Integer.valueOf(request.getParameter("sid"));
  32.  
  33.         // 3.业务处理
  34.         StudentService service = new StudentServiceImpl();
  35.  
  36.          Student stu=service.findById(sid);
  37.          System.out.println("stu:"+stu);
  38.          if(stu!=null){
  39.              System.out.println("根据id查询到对象");
  40.              request.setAttribute("stu", stu);
  41.              request.getRequestDispatcher("update.jsp").forward(request, response);
  42.          }else{
  43.              System.out.println("没有根据id查询到对象");
  44.          }
  45.     }
  46. }
  1. package com.servlet;
  2.  
  3. import java.io.IOException;
  4.  
  5. import javax.servlet.ServletException;
  6. import javax.servlet.http.HttpServlet;
  7. import javax.servlet.http.HttpServletRequest;
  8. import javax.servlet.http.HttpServletResponse;
  9.  
  10. import com.entity.Student;
  11. import com.service.StudentService;
  12. import com.service.impl.StudentServiceImpl;
  13.  
  14. public class UpdateServlet extends HttpServlet {
  15.     private static final long serialVersionUID = 1L;
  16.  
  17.     public void doGet(HttpServletRequest request, HttpServletResponse response)
  18.             throws ServletException, IOException {
  19.  
  20.         this.doPost(request, response);
  21.     }
  22.  
  23.     public void doPost(HttpServletRequest request, HttpServletResponse response)
  24.             throws ServletException, IOException {
  25.         request.setCharacterEncoding("UTF-8");
  26.         response.setCharacterEncoding("UTF-8");
  27.         response.setContentType("text/html;charset=UTF-8");
  28.  
  29.         // 2.接受参数
  30.         Integer sid=Integer.valueOf(request.getParameter("sid"));
  31.         String sname = request.getParameter("sname");
  32.         String password = request.getParameter("password");
  33.         String sex = request.getParameter("sex");
  34.         Integer cid=Integer.valueOf(request.getParameter("cid"));
  35.         Student stu=new Student(sid,sname, password, sex, cid);
  36.  
  37.         // 3.业务处理
  38.         StudentService service = new StudentServiceImpl();
  39.         int num=service.update(stu);
  40.         if(num>0){
  41.             System.out.println("update success!");
  42.             response.sendRedirect("FindAllServlet");
  43.         }else{
  44.             System.out.println("update fail!");
  45.         }
  46.     }
  47. }
  1. package com.servlet;
  2.  
  3. import java.io.IOException;
  4.  
  5. import javax.servlet.ServletException;
  6. import javax.servlet.http.HttpServlet;
  7. import javax.servlet.http.HttpServletRequest;
  8. import javax.servlet.http.HttpServletResponse;
  9.  
  10. import com.entity.Student;
  11. import com.service.StudentService;
  12. import com.service.impl.StudentServiceImpl;
  13.  
  14. public class DeleteSerlvet extends HttpServlet {
  15.     private static final long serialVersionUID = 1L;
  16.  
  17.     public void doGet(HttpServletRequest request, HttpServletResponse response)
  18.             throws ServletException, IOException {
  19.  
  20.         this.doPost(request, response);
  21.     }
  22.  
  23.     public void doPost(HttpServletRequest request, HttpServletResponse response)
  24.             throws ServletException, IOException {
  25.         request.setCharacterEncoding("UTF-8");
  26.         response.setCharacterEncoding("UTF-8");
  27.         response.setContentType("text/html;charset=UTF-8");
  28.  
  29.         // 2.接受参数
  30.         Integer sid=Integer.valueOf(request.getParameter("sid"));
  31.         // 3.业务处理
  32.         StudentService service = new StudentServiceImpl();
  33.         Student stu=service.findById(sid);
  34.         if (stu != null) {
  35.             System.out.println("根据id查询成功");
  36.              int num=service.delete(stu);
  37.              if(num>0){
  38.                  System.out.println("delete success!!");
  39.                  // 4.页面跳转
  40.                  response.sendRedirect("FindAllServlet");
  41.  
  42.              }else{
  43.                  System.out.println("delete success!!");
  44.  
  45.              }
  46.         } else {
  47.             System.out.println("根据id查询失败!");
  48.         }
  49.     }
  50. }

14.配置web.xml

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <web-app version="2.5"
  3.     xmlns="http://java.sun.com/xml/ns/javaee"
  4.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  5.     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
  6.     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  7.  
  8.   <servlet>
  9.     <servlet-name>LoginServlet</servlet-name>
  10.     <servlet-class>com.servlet.LoginServlet</servlet-class>
  11.   </servlet>
  12.   <servlet>
  13.     <servlet-name>FindAllServlet</servlet-name>
  14.     <servlet-class>com.servlet.FindAllServlet</servlet-class>
  15.   </servlet>
  16.   <servlet>
  17.     <servlet-name>FindByIdSerlvet</servlet-name>
  18.     <servlet-class>com.servlet.FindByIdSerlvet</servlet-class>
  19.   </servlet>
  20.   <servlet>
  21.     <servlet-name>UpdateServlet</servlet-name>
  22.     <servlet-class>com.servlet.UpdateServlet</servlet-class>
  23.   </servlet>
  24.   <servlet>
  25.     <servlet-name>DeleteSerlvet</servlet-name>
  26.     <servlet-class>com.servlet.DeleteSerlvet</servlet-class>
  27.   </servlet>
  28.   <servlet>
  29.     <servlet-name>RegisterServlet</servlet-name>
  30.     <servlet-class>com.servlet.RegisterServlet</servlet-class>
  31.   </servlet>
  32.   <servlet>
  33.     <servlet-name>FindPageServlet</servlet-name>
  34.     <servlet-class>com.servlet.FindPageServlet</servlet-class>
  35.   </servlet>
  36.  
  37.   <servlet-mapping>
  38.     <servlet-name>LoginServlet</servlet-name>
  39.     <url-pattern>/LoginServlet</url-pattern>
  40.   </servlet-mapping>
  41.   <servlet-mapping>
  42.     <servlet-name>FindAllServlet</servlet-name>
  43.     <url-pattern>/FindAllServlet</url-pattern>
  44.   </servlet-mapping>
  45.   <servlet-mapping>
  46.     <servlet-name>FindByIdSerlvet</servlet-name>
  47.     <url-pattern>/FindByIdSerlvet</url-pattern>
  48.   </servlet-mapping>
  49.   <servlet-mapping>
  50.     <servlet-name>UpdateServlet</servlet-name>
  51.     <url-pattern>/UpdateServlet</url-pattern>
  52.   </servlet-mapping>
  53.   <servlet-mapping>
  54.     <servlet-name>DeleteSerlvet</servlet-name>
  55.     <url-pattern>/DeleteSerlvet</url-pattern>
  56.   </servlet-mapping>
  57.   <servlet-mapping>
  58.     <servlet-name>RegisterServlet</servlet-name>
  59.     <url-pattern>/RegisterServlet</url-pattern>
  60.   </servlet-mapping>
  61.   <servlet-mapping>
  62.     <servlet-name>FindPageServlet</servlet-name>
  63.     <url-pattern>/FindPageServlet</url-pattern>
  64.   </servlet-mapping>
  65.   <welcome-file-list>
  66.     <welcome-file>login.jsp</welcome-file>
  67.   </welcome-file-list>
  68. </web-app>

15.首页

  1. <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
  2. <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
  3. <%
  4.     String path = request.getContextPath();
  5.     String basePath = request.getScheme() + "://"
  6.             + request.getServerName() + ":" + request.getServerPort()
  7.             + path + "/";
  8. %>
  9.  
  10. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
  11. <html>
  12.     <head>
  13.         <base href="<%=basePath%>">
  14.  
  15.         <title>My JSP 'index.jsp' starting page</title>
  16.         <meta http-equiv="pragma" content="no-cache">
  17.         <meta http-equiv="cache-control" content="no-cache">
  18.         <meta http-equiv="expires" content="0">
  19.         <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
  20.         <meta http-equiv="description" content="This is my page">
  21.         <!--
  22.     <link rel="stylesheet" type="text/css" href="styles.css">
  23.     -->
  24.     </head>
  25.  
  26.     <body>
  27.     <CENTER>
  28.         <h3>学生信息表</h3>
  29.         <table border="2">
  30.             <tr>
  31.                 <td>
  32.                     序号
  33.                 </td>
  34.                 <td>
  35.                     姓名
  36.                 </td>
  37.                 <td>
  38.                     性别
  39.                 </td>
  40.                 <td align="center">
  41.                     操作
  42.                 </td>
  43.             </tr>
  44.  
  45.             <c:forEach var="i" items="${list}"  varStatus="f">
  46.                 <tr <c:if test="${f.index%2==0}">style="background-color:orange;"</c:if>>
  47.                     <td>
  48.                         ${i.sid }
  49.                     </td>
  50.                     <td>
  51.                         ${i.sname }
  52.                     </td>
  53.                     <td>
  54.                         ${i.sex }
  55.                     </td>
  56.                     <td>
  57.                         <a href="register.jsp">添加</a>
  58.                         &nbsp;&nbsp;
  59.                         <a href="FindByIdSerlvet?sid=${i.sid}">修改</a>
  60.                         &nbsp;&nbsp;
  61.                         <a href="DeleteSerlvet?sid=${i.sid}">删除</a>
  62.  
  63.                     </td>
  64.                 </tr>
  65.             </c:forEach>
  66.  
  67.         </table>
  68.         <div>
  69.  
  70.         第${page.pageno}/${page.totalpage}页 &nbsp;&nbsp;
  71.         <a href="FindAllServlet?pageNo=1">首页</a>
  72.         <c:choose>
  73.           <c:when test="${page.pageno gt 1}">
  74.             <a href="FindAllServlet?pageNo=${page.pageno-1 }">上一页</a>
  75.           </c:when>
  76.           <c:otherwise>
  77.             <a href="javascript:alert('已经是第一页了,没有上一页!');">上一页</a>
  78.           </c:otherwise>
  79.         </c:choose>
  80.         <c:choose>
  81.           <c:when test="${page.pageno lt page.totalpage}">
  82.             <a href="FindAllServlet?pageNo=${page.pageno+1 }">下一页</a>
  83.           </c:when>
  84.           <c:otherwise>
  85.             <a href="javascript:alert('已经是最有一页了,没有下一页!');">下一页</a>
  86.           </c:otherwise>
  87.         </c:choose>
  88.  
  89.         <a href="FindAllServlet?pageNo=${page.totalpage}">末页</a>
  90.         &nbsp;&nbsp;
  91.         共${page.totalcount}条
  92.  
  93.         </div>
  94.  
  95.     </CENTER>
  96.  
  97.     </body>
  98. </html>

16.登录页面

  1. <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
  2. <%
  3.     String path = request.getContextPath();
  4.     String basePath = request.getScheme() + "://"
  5.             + request.getServerName() + ":" + request.getServerPort()
  6.             + path + "/";
  7. %>
  8.  
  9. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
  10. <html>
  11.     <head>
  12.         <base href="<%=basePath%>">
  13.  
  14.         <title>My JSP 'index.jsp' starting page</title>
  15.         <meta http-equiv="pragma" content="no-cache">
  16.         <meta http-equiv="cache-control" content="no-cache">
  17.         <meta http-equiv="expires" content="0">
  18.         <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
  19.         <meta http-equiv="description" content="This is my page">
  20.         <!--
  21.     <link rel="stylesheet" type="text/css" href="styles.css">
  22.     -->
  23.     </head>
  24.  
  25.     <body>
  26.         <center>
  27.             <fieldset style="width: 300px;">
  28.                 <legend>
  29.                     登录
  30.                 </legend>
  31.                 <form action="LoginServlet" method="post">
  32.                     <table>
  33.                         <tr>
  34.                             <td>
  35.                                 用户名:
  36.                             </td>
  37.                             <td>
  38.                                 <input type="text" name="sname" />
  39.                             </td>
  40.                         </tr>
  41.                         <tr>
  42.                             <td>
  43.                                 密码:
  44.                             </td>
  45.                             <td>
  46.                                 <input type="password" name="password" />
  47.                             </td>
  48.                         </tr>
  49.                         <tr>
  50.                             <td>
  51.                                 <input type="submit" value="提交" />
  52.                             </td>
  53.                             <td>
  54.                                 <input type="reset" value="重置" />
  55.                             </td>
  56.                         </tr>
  57.                     </table>
  58.                 </form>
  59.             </fieldset>
  60.         </center>
  61.     </body>
  62. </html>

17.注册页面

  1. <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
  2. <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
  3. <%
  4.     String path = request.getContextPath();
  5.     String basePath = request.getScheme() + "://"
  6.             + request.getServerName() + ":" + request.getServerPort()
  7.             + path + "/";
  8. %>
  9.  
  10. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
  11. <html>
  12.     <head>
  13.         <base href="<%=basePath%>">
  14.  
  15.         <title>My JSP 'index.jsp' starting page</title>
  16.         <meta http-equiv="pragma" content="no-cache">
  17.         <meta http-equiv="cache-control" content="no-cache">
  18.         <meta http-equiv="expires" content="0">
  19.         <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
  20.         <meta http-equiv="description" content="This is my page">
  21.         <!--
  22.     <link rel="stylesheet" type="text/css" href="styles.css">
  23.     -->
  24.     </head>
  25.  
  26.     <body>
  27.         <center>
  28.             <fieldset style="width: 500px;">
  29.                 <legend>
  30.                     注册
  31.                 </legend>
  32.                 <form action="RegisterServlet" method="post">
  33.                     <table>
  34.                         <tr>
  35.                             <td>
  36.                                 用户名:
  37.                             </td>
  38.                             <td>
  39.                                 <input type="text" name="sname"/>
  40.                             </td>
  41.                         </tr>
  42.                         <tr>
  43.                             <td>
  44.                                 密码:
  45.                             </td>
  46.                             <td>
  47.                                 <input type="password" name="password"/>
  48.                             </td>
  49.                         </tr>
  50.                         <tr>
  51.                             <td>
  52.                                 性别:
  53.                             </td>
  54.                             <td>
  55.                                     <input type="radio" name="sex" value="男" checked="checked"/>男
  56.                                     <input type="radio" name="sex" value="女"/>女
  57.                             </td>
  58.                         </tr>
  59.                         <tr>
  60.                             <td>
  61.                                 班级编号:
  62.                             </td>
  63.                             <td>
  64.                                 <select name="cid">
  65.                                   <option value="1">TB07</option>
  66.                                   <option value="2">TB13</option>
  67.                                   <option value="3">TB24</option>
  68.                                   <option value="4">TB31</option>
  69.                                 </select>
  70.                             </td>
  71.                         </tr>
  72.                         <tr>
  73.                             <td>
  74.                                 <input type="submit" value="注册" />
  75.                             </td>
  76.                             <td>
  77.                                 <input type="reset" value="重置" />
  78.                             </td>
  79.                         </tr>
  80.                     </table>
  81.                 </form>
  82.             </fieldset>
  83.         </center>
  84.     </body>
  85. </html>

18.修改

  1. <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
  2. <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
  3. <%
  4.     String path = request.getContextPath();
  5.     String basePath = request.getScheme() + "://"
  6.             + request.getServerName() + ":" + request.getServerPort()
  7.             + path + "/";
  8. %>
  9.  
  10. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
  11. <html>
  12.     <head>
  13.         <base href="<%=basePath%>">
  14.         <title>My JSP 'index.jsp' starting page</title>
  15.         <meta http-equiv="pragma" content="no-cache">
  16.         <meta http-equiv="cache-control" content="no-cache">
  17.         <meta http-equiv="expires" content="0">
  18.         <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
  19.         <meta http-equiv="description" content="This is my page">
  20.         <!--
  21.     <link rel="stylesheet" type="text/css" href="styles.css">
  22.     -->
  23.     </head>
  24.  
  25.     <body>
  26.         <center>
  27.             <fieldset style="width: 500px;">
  28.                 <legend>
  29.                     <br>修改
  30.                 </legend>
  31.                 <form action="UpdateServlet?sid=${stu.sid}" method="post">
  32.                     <table>
  33.                         <tr>
  34.                             <td>
  35.                                 用户名:
  36.                             </td>
  37.                             <td>
  38.                                 <input type="text" name="sname" value="${stu.sname}"/>
  39.                             </td>
  40.                         </tr>
  41.                         <tr>
  42.                             <td>
  43.                                 密码:
  44.                             </td>
  45.                             <td>
  46.                                 <input type="password" name="password" value="${stu.password}"/>
  47.                             </td>
  48.                         </tr>
  49.                         <tr>
  50.                             <td>
  51.                                 性别:
  52.                             </td>
  53.                             <td>
  54.                                 <c:choose>
  55.                                   <c:when test="${stu.sex eq '男'}">
  56.                                     <input type="radio" name="sex" value="男" checked="checked"/>男
  57.                                     <input type="radio" name="sex" value="女"/>女
  58.                                   </c:when>
  59.                                   <c:otherwise>
  60.                                      <input type="radio" name="sex" value="男"/>男
  61.                                     <input type="radio" name="sex" value="女" checked="checked"/>女
  62.                                   </c:otherwise>
  63.                                 </c:choose>
  64.                             </td>
  65.                         </tr>
  66.                         <tr>
  67.                             <td>
  68.                                 班级编号:
  69.                             </td>
  70.                             <td>
  71.                                 <select name="cid">
  72.                                   <option value="1">TB07</option>
  73.                                   <option value="2">TB13</option>
  74.                                   <option value="3">TB24</option>
  75.                                   <option value="4">TB31</option>
  76.                                 </select>
  77.                             </td>
  78.                         </tr>
  79.  
  80.                         <tr>
  81.                             <td>
  82.                                 <input type="submit" value="修改" />
  83.                             </td>
  84.                             <td>
  85.                                 <input type="reset" value="重置" />
  86.                             </td>
  87.                         </tr>
  88.                     </table>
  89.                 </form>
  90.             </fieldset>
  91.         </center>
  92.     </body>
  93. </html>

部分截图       2016-09-2415:21:19

注:希望各路大神多多指点!!!

Hibernate全套增删改查+分页的更多相关文章

  1. OracleHelper(对增删改查分页查询操作进行了面向对象的封装，对批量增删改操作的事务封装)

    公司的一个新项目使用ASP.NET MVC开发,经理让我写个OracleHelper,我从网上找了一个比较全的OracleHelper类,缺点是查询的时候返回DataSet,数据增删改要写很多代码(当 ...

  2. SpringMVC4+MyBatis3+SQLServer 2014 整合（包括增删改查分页）

    前言 说起整合自然离开ssm,我本身并不太喜欢ORM,尤其是MyBatis,把SQL语句写在xml里,尤其是大SQL,可读性不高,出错也不容易排查. 开发环境 idea2016.SpringMVC4. ...

  3. node-express项目的搭建并通过mongoose操作MongoDB实现增删改查分页排序（四）

    最近写了一个用node来操作MongoDB完成增.删.改.查.排序.分页功能的示例,并且已经放在了服务器上地址:http://39.105.32.180:3333. Mongoose是在node.js ...

  4. hibernate实现增删改查的各种方法

    1>接口(主要是增删改查的接口)BaseDao.java /** * * @author fly.zhou */ public interface IBaseDao { //增加对应实体的一条记 ...

  5. EasyUI + Spring MVC + hibernate实现增删改查导入导出

    (这是一个故事--) 前言 作为一个JAVA开发工程师,我觉得最基本是需要懂前端.后台以及数据库. 练习的内容很基础,包括:基本增删改查.模糊查询.分页查询.树菜单.上传下载.tab页 主管发我一个已 ...

  6. Hibernate的增删改查

    一.搭建Hibernate开发环境,这里就不说了,直接说环境搭好后的事情. 二.项目的目录结构

  7. hibernate之增删改查demo

    package dao; import java.util.ArrayList; import java.util.List; import org.hibernate.Query; import o ...

  8. Hibernate基础增删改查语法

    1.创建好Hibernate项目,创建好实体类和测试类,如果不会创建Hibernate项目的同学,点此处:http://www.cnblogs.com/zhaojinyan/p/9336174.htm ...

  9. graphql 数据增删改查分页及关联操作（三）

    说明: 接第二篇文章,代码也是在第二篇文章之上 本文只是针对mondodb来操作 一.添加相关的包 yarn add Mongoose 二.初始化Mongodb 修改server.ts 导入 impo ...

随机推荐

  1. 多线程条件通行工具——CountDownLatch

    CountDownLatch的作用是,线程进入等待后,需要计数器达到0才能通行. CountDownLatch(int)构造方法,指定初始计数. await()等待计数减至0. await(long, ...

  2. canvas快速绘制圆形、三角形、矩形、多边形

    想看前面整理的canvas常用API的同学可以点下面: canvas学习之API整理笔记(一) canvas学习之API整理笔记(二) 本系列文章涉及的所有代码都将上传至:项目代码github地址,喜 ...

  3. sqlyog导出json数据格式支持mysql数据转存mongodb

    <!-------------知识的力量是无限的(当然肯定还有更简单的方法)-----------!> 当我考虑将省市区三级联动数据从mysql转入mongodb时遇到了网上无直接插入mo ...

  4. [DJANGO] excel十几万行数据快速导入数据库研究

    先贴原来的导入数据代码: 8 import os os.environ.setdefault("DJANGO_SETTINGS_MODULE", "www.setting ...

  5. NYOJ 455

    1.应该交代清楚,参加宴会的人不知道一共有多少顶帽子.假如知道有n顶帽子的话,第一次开灯看见有n-1只,自然就知道自己是第n顶黑帽子,所以应该是这n个人在第一次关灯就打自己脸,不过这么一来就没意思了, ...

  6. 抛弃jQuery：DOM API之选择元素

    原文链接:http://blog.garstasio.com/you-dont-need-jquery/selectors/ 我的Blog:http://cabbit.me/you-dont-need ...

  7. C++ std::priority_queue

    std::priority_queue template <class T, class Container = vector<T>, class Compare = less< ...

  8. Vue2.0用components替换render报错

    怀疑是webpack配置的问题,改了一下午也没弄好.去群里问了一轮,也没个解决的. 在研究的过程中,发现了一篇好的讨论帖,看这个帖子能学到不少东西.暂时放弃这个问题的研究了,太费时间,要深入学习编译原 ...

  9. hibernate一对一主键双向关联

    关联是类(类的实例)之间的关系,表示有意义和值得关注的连接. 本系列将介绍Hibernate中主要的几种关联映射 Hibernate一对一主键单向关联Hibernate一对一主键双向关联Hiberna ...

  10. epoll LT/ET 深度剖析

    EPOLL事件的两种模型: Level Triggered (LT) 水平触发 .socket接收缓冲区不为空 有数据可读 读事件一直触发 .socket发送缓冲区不满 可以继续写入数据 写事件一直触 ...