使用maven搭建Hibernate

使用maven搭建Hibernate框架(web项目)

 create table USERS
 (
   ID        NUMBER not null primary key,
   NAME      VARCHAR2(50),
   PASSWORD  VARCHAR2(50),
   TELEPHONE VARCHAR2(15),
   USERNAME  VARCHAR2(50),
   ISADMIN   VARCHAR2(5)
 );
 create table DISTRICT
 (
   ID   NUMBER not null primary key,
   NAME VARCHAR2(50) not null
 );
 create table HOUSE
 (
   ID          NUMBER,
   USER_ID     NUMBER,
   TYPE_ID     NUMBER,
   TITLE       NVARCHAR2(50),
   DESCRIPTION NVARCHAR2(2000),
   PRICE       NUMBER,
   PUBDATE     DATE,
   FLOORAGE    NUMBER,
   CONTACT     VARCHAR2(100),
   STREET_ID   NUMBER
 );

 create table STREET
 (
   ID          NUMBER not null primary key,
   NAME        VARCHAR2(50),
   DISTRICT_ID NUMBER
 );
 create table TYPE
 (
   ID   NUMBER not null primary key,
   NAME VARCHAR2(12) not null
 );
 --主外键关系
 ALTER TABLE HOUSE  ADD  CONSTRAINT fk_HOUSE_STREET FOREIGN KEY(STREET_ID) REFERENCES STREET (ID);
 ALTER TABLE HOUSE  ADD  CONSTRAINT fk_HOUSE_TYPE FOREIGN KEY(TYPE_ID) REFERENCES TYPE (ID);
 ALTER TABLE HOUSE  ADD  CONSTRAINT fk_HOUSE_USERS FOREIGN KEY(USER_ID) REFERENCES USERS (ID) ;
 ALTER TABLE STREET  ADD  CONSTRAINT fk_DISTRICT_STREET FOREIGN KEY(DISTRICT_ID) REFERENCES DISTRICT(ID);
 --DISTRICT
 insert into DISTRICT (ID, NAME)
 values (1001, '东城');
 insert into DISTRICT (ID, NAME)
 values (1002, '西城');
 insert into DISTRICT (ID, NAME)
 values (1003, '石景山');
 insert into DISTRICT (ID, NAME)
 values (1006, '朝阳');
 insert into DISTRICT (ID, NAME)
 values (1000, '丰台');
 insert into DISTRICT (ID, NAME)
 values (1004, '海淀');
 commit;
 --STREET
 insert into STREET (ID, NAME, DISTRICT_ID)
 values (1000, '知春路', 1004);
 insert into STREET (ID, NAME, DISTRICT_ID)
 values (1001, '中关村大街', 1004);
 insert into STREET (ID, NAME, DISTRICT_ID)
 values (1002, '学院路', 1004);
 insert into STREET (ID, NAME, DISTRICT_ID)
 values (1003, '朝阳路', 1006);
 commit;
 --USERS
 INSERT INTO USERS(ID,NAME,PASSWORD,TELEPHONE,USERNAME,ISADMIN) VALUES(1001,'zhangsan','','','张三','是');
 INSERT INTO USERS(ID,NAME,PASSWORD,TELEPHONE,USERNAME,ISADMIN) VALUES(1002,'lisi','','','李四','否');
 INSERT INTO USERS(ID,NAME,PASSWORD,TELEPHONE,USERNAME,ISADMIN) VALUES(1003,'wangxin','','','王鑫','是');
 INSERT INTO USERS(ID,NAME,PASSWORD,TELEPHONE,USERNAME,ISADMIN) VALUES(1004,'zhangjian','','','张建','否');
 INSERT INTO USERS(ID,NAME,PASSWORD,TELEPHONE,USERNAME,ISADMIN) VALUES(1005,'lijian','','','李健','是');
 INSERT INTO USERS(ID,NAME,PASSWORD,TELEPHONE,USERNAME,ISADMIN) VALUES(1006,'jiangyiran','','','蒋以然','否');
 INSERT INTO USERS(ID,NAME,PASSWORD,TELEPHONE,USERNAME,ISADMIN) VALUES(1007,'wangxiaochao','','','王晓超','否');
 INSERT INTO USERS(ID,NAME,PASSWORD,TELEPHONE,USERNAME,ISADMIN) VALUES(1008,'zhangdongxue','','','张冬雪','否');
 INSERT INTO USERS(ID,NAME,PASSWORD,TELEPHONE,USERNAME,ISADMIN) VALUES(1009,'sunpeng','','','孙鹏');
 INSERT INTO USERS(ID,NAME,PASSWORD,TELEPHONE,USERNAME,ISADMIN) VALUES(1010,'jianglianchang','','','蒋连昌','否');
 commit;
 --TYPE
 insert into TYPE (ID, NAME)
 values (1000, '一室一厅');
 insert into TYPE (ID, NAME)
 values (1001, '一室两厅');
 insert into TYPE (ID, NAME)
 values (1002, '两室一厅');
 insert into TYPE (ID, NAME)
 values (1003, '两室两厅');
 insert into TYPE (ID, NAME)
 values (1004, '三室一厅');
 insert into TYPE (ID, NAME)
 values (1005, '三室两厅');
 insert into TYPE (ID, NAME)
 values (1006, '四室一厅');
 insert into TYPE (ID, NAME)
 values (1007, '四室两厅');
 insert into TYPE (ID, NAME)
 values (1008, '四十三厅');
 commit;
 --HOUSE
 INSERT INTO HOUSE(ID,USER_ID,TYPE_ID,TITLE,DESCRIPTION,PRICE,PUBDATE,FLOORAGE,CONTACT,STREET_ID)
 VALUES(1,1001,1002,'中关村','中关村一条街',2600,to_date('2014-02-14','yyyy-mm-dd'),100,'张三',1000);
 INSERT INTO HOUSE(ID,USER_ID,TYPE_ID,TITLE,DESCRIPTION,PRICE,PUBDATE,FLOORAGE,CONTACT,STREET_ID)
 VALUES(2,1002,1003,'苏州街','苏州街一条街',3600,to_date('2009-1-3','yyyy-mm-dd'),100,'李四',1001);
 INSERT INTO HOUSE(ID,USER_ID,TYPE_ID,TITLE,DESCRIPTION,PRICE,PUBDATE,FLOORAGE,CONTACT,STREET_ID)
 VALUES(3,1003,1004,'万泉庄','万泉庄一条街',4600,to_date('2009-1-4','yyyy-mm-dd'),130,'王鑫',1002);
 INSERT INTO HOUSE(ID,USER_ID,TYPE_ID,TITLE,DESCRIPTION,PRICE,PUBDATE,FLOORAGE,CONTACT,STREET_ID)
 VALUES(1,1003,1002,'万泉庄附近','万泉庄附近一条街',1500,to_date('2009-7-2','yyyy-mm-dd'),125,'张建',1003);
 INSERT INTO HOUSE(ID,USER_ID,TYPE_ID,TITLE,DESCRIPTION,PRICE,PUBDATE,FLOORAGE,CONTACT,STREET_ID)
 VALUES(1,1005,1002,'东单','东单很多美食',2700,to_date('2009-9-2','yyyy-mm-dd'),140,'蒋以然',1001);
 INSERT INTO HOUSE(ID,USER_ID,TYPE_ID,TITLE,DESCRIPTION,PRICE,PUBDATE,FLOORAGE,CONTACT,STREET_ID)
 VALUES(3,1001,1002,'中关村','中关村电脑城',2600,to_date('2009-4-1','yyyy-mm-dd'),137,'王晓超',1003);
 INSERT INTO HOUSE(ID,USER_ID,TYPE_ID,TITLE,DESCRIPTION,PRICE,PUBDATE,FLOORAGE,CONTACT,STREET_ID)
 VALUES(4,1004,1001,'东四','东四一条街',2000,to_date('2009-4-2','yyyy-mm-dd'),200,'王晓超',1002);
 INSERT INTO HOUSE(ID,USER_ID,TYPE_ID,TITLE,DESCRIPTION,PRICE,PUBDATE,FLOORAGE,CONTACT,STREET_ID)
 VALUES(5,1006,1003,'西四','西四一条街',3600,to_date('2009-1-2','yyyy-mm-dd'),210,'张冬雪',1003);
 INSERT INTO HOUSE(ID,USER_ID,TYPE_ID,TITLE,DESCRIPTION,PRICE,PUBDATE,FLOORAGE,CONTACT,STREET_ID)
 VALUES(5,1007,1002,'西单','西单购物城',3600,to_date('2009-4-2','yyyy-mm-dd'),240,'孙鹏',1001);
 INSERT INTO HOUSE(ID,USER_ID,TYPE_ID,TITLE,DESCRIPTION,PRICE,PUBDATE,FLOORAGE,CONTACT,STREET_ID)
 VALUES(6,1002,1002,'苏州街','苏州街美食',2600,to_date('2009-2-2','yyyy-mm-dd'),260,'蒋连昌',1000);
 commit;

create.sql

第一步：打开idea

第二步：创建maven项目

第三步：创建项目名称

第四步：创建完成之后，选中src点击右键选择Directory创建java文件夹

第五步：选中java点击右键，选中 Mark Diectory as 选择Sources Root

第六步：选中main点击右键Directory创建resources文件夹

第七步：选中resources点击右键，选中 Mark Diectory as 选择Sources Root

第八步：点击 File — Project Structure —Facets，点击 "+" 选中hibernate

第九步:IDEA连接Oracle数据

 <?xml version="1.0" encoding="UTF-8"?>

 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
   <modelVersion>4.0.0</modelVersion>

   <groupId>com.bdqn</groupId>
   <artifactId>Hid03</artifactId>
   <version>1.0-SNAPSHOT</version>
   <packaging>war</packaging>

   <name>Hid03 Maven Webapp</name>
   <!-- FIXME change it to the project's website -->
   <url>http://www.example.com</url>

   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <maven.compiler.source>1.7</maven.compiler.source>
     <maven.compiler.target>1.7</maven.compiler.target>
   </properties>

   <dependencies>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
       <version>4.11</version>
       <scope>test</scope>
     </dependency>

     <dependency>
       <groupId>org.hibernate</groupId>
       <artifactId>hibernate-core</artifactId>
       <version>4.0.0.Final</version>
     </dependency>

     <dependency>
       <groupId>com.oracle</groupId>
       <artifactId>ojdbc6</artifactId>
       <version>10.2.0.1.0</version>
     </dependency>
     <dependency>
       <groupId>javax.servlet</groupId>
       <artifactId>jstl</artifactId>
       <version>1.2</version>
     </dependency>

     <dependency>
       <groupId>javax.servlet</groupId>
       <artifactId>javax.servlet-api</artifactId>
       <version>3.0.1</version>
       <scope>provided</scope>
     </dependency>

     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-databind</artifactId>
       <version>2.8.3</version>
     </dependency>
     <dependency>
       <groupId>org.apache.taglibs</groupId>
       <artifactId>taglibs-standard-impl</artifactId>
       <version>1.2.5</version>
     </dependency>
   </dependencies>

 </project>

pom.xml

 <?xml version='1.0' encoding='utf-8'?>
 <!DOCTYPE hibernate-configuration PUBLIC
     "-//Hibernate/Hibernate Configuration DTD//EN"
     "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">
 <hibernate-configuration>
   <session-factory>
     <property name="connection.driver_class">oracle.jdbc.OracleDriver</property> <!--Oracle 数据驱动-->
     <property name="connection.url">jdbc:oracle:thin:@127.0.0.1:1521:orcl</property> <!--数据库路径-->
     <property name="connection.username">OT</property>
     <property name="connection.password">1234</property>
     <property name="dialect">org.hibernate.dialect.Oracle10gDialect</property><!--数据库方言-->
     <property name="show_sql">true</property><!--生成的sql语句-->
     <property name="format_sql">true</property><!--sql格式化-->
     <mapping resource="mapping/User.hbm.xml"/>
   </session-factory>
 </hibernate-configuration>

hibernate.cfg.xml

 <?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
 <hibernate-mapping>
   <class name="com.bdqn.entity.Users" table="Users">
       <id name="id" type="java.lang.Integer" column="id">
           <generator class="increment"/>
       </id>
        <property name="name" type="java.lang.String" column="NAME"/>
        <property name="password" type="java.lang.String" column="PASSWORD"/>
        <property name="telephone" type="java.lang.String" column="TELEPHONE"/>
        <property name="username" type="java.lang.String" column="USERNAME"/>
       <property name="isadmin" type="java.lang.String" column="ISADMIN"/>

    </class>
 </hibernate-mapping>

User.hbm.xml

dao层

 package com.bdqn.dao;

 import com.bdqn.entity.Users;
 import com.bdqn.page.Page;
 import java.util.List;

 public interface UserDao {
     /**
      * 1.根据用户名和密码查询
      *
      * @param sname
      * @param password
      * @return
      */
     Users findByNameAndPwd(String sname, String password);

     /**
      * 2.延时加载:查询所有
      *
      * @return
      */
     List<Users> findAll();

     /**
      * 3.保存
      *
      * @param stu
      * @return
      */
     int save(Users stu);

     /**
      * 4.根据主键id查询单条
      *
      * @param sid
      * @return
      */
     Users findById(Integer sid);

     /**
      * 5.修改
      */
     int update(Users stu);

     /**
      * 6.删除对象
      *
      * @param stu
      * @return
      */
     int delete(Users stu);

     /**
      * 7.分页查询
      */
     List<Users> findPage(Page page);

     /**
      * 8.查询总条数
      */
     int getTotalCount();
 }

UserDao

 package com.bdqn.dao.impl;

 import com.bdqn.dao.UserDao;
 import com.bdqn.entity.Users;
 import com.bdqn.page.Page;
 import com.bdqn.util.Hibernate_Util;
 import org.hibernate.HibernateException;
 import org.hibernate.Query;
 import org.hibernate.Session;
 import java.util.List;

 public class UserDaoImpl implements UserDao {
     /**
      * 1.查询所有:立即加载
      */
     public List<Users> findAll() {
         //1.获取session对象
         Session session = Hibernate_Util.getSession();
         //2.定义hql语句
         String hql = "from Users";
         //3.Session创建Query对象
         Query query = session.createQuery(hql);
         //4.query对象执行操作
         List<Users> it = query.list();
         //5.释放资源
         Hibernate_Util.closeSession();
         return it;
     }

     /**
      * 2.根据用户名和密码查询
      */
     public Users findByNameAndPwd(String sname, String password) {
         //1.获取session对象
         Session session = Hibernate_Util.getSession();
         //2.定义hql语句(命名参数)
         String hql = "from Users where name=:name and password=:password";
         //3.Session创建Query对象
         Query query = session.createQuery(hql);
         //4.query对象给占位符赋值
         /*query.setString("sname", sname);
          query.setString("password", password);*/
         query.setParameter("name", sname);
         query.setParameter("password", password);

         //query.setProperties(user);
         //5.执行操作(uniqueResult()查询的单行数据)
         Users stu = (Users) query.uniqueResult();
         //6.释放资源
         Hibernate_Util.closeSession();
         return stu;

     }

     /**
      * 根据id主键查询单条
      */
     public Users findById(Integer sid) {
         //1.获取session对象
         Session session = Hibernate_Util.getSession();
         //2.利用session根据主键查询
         Users stu = (Users) session.get(Users.class, sid);
         /*3.
          * 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,
          * 而在修改时session执行update方法时,
          * 首先会查询该主键id是否存在,
          * 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,
          * 而实际session中不能同时存在两个主键id相同的对象,
          * 否则会出现如下错误:
          * org.hibernate.NonUniqueObjectException:
          * a different object with the same identifier
          * value was already associated with the
          * session: [com.entity.Student#1]
          */
         Hibernate_Util.closeSession();
         // session.clear();
         return stu;
     }

     /**
      * 删除对象
      */
     public int delete(Users stu) {
         int num = 1;
         //1.获取session对象
         Session session = Hibernate_Util.getSession();

         try {
             //session删除操作
             session.delete(stu);
             session.beginTransaction().commit();
         } catch (HibernateException e) {
             num = 0;
             // TODO Auto-generated catch block
             e.printStackTrace();
         } finally {
             //5.释放资源
             Hibernate_Util.closeSession();
         }

         return num;
     }

     /**
      * 添加
      */
     public int save(Users stu) {
         int num = 1;
         //1.获取session对象
         Session session = Hibernate_Util.getSession();
         //执行操作
         try {
             session.save(stu);
             session.beginTransaction().commit();
         } catch (HibernateException e) {
             num = 0;
             e.printStackTrace();
         } finally {
             //5.释放资源
             Hibernate_Util.closeSession();
         }
         return num;
     }

     /**
      * 修改
      */
     public int update(Users stu) {
         int num = 1;
         //1.获取session对象
         Session session = Hibernate_Util.getSession();
         try {
             //执行操作
             //该对象的主键id必须存在
             session.update(stu);
             session.beginTransaction().commit();
         } catch (HibernateException e) {
             num = 0;
             e.printStackTrace();
         } finally {
             //5.释放资源
             Hibernate_Util.closeSession();
         }
         return num;
     }

     /**
      * 7.分页查询
      */
     public List<Users> findPage(Page page) {
         //1.获取session
         Session session = Hibernate_Util.getSession();

         //2.定义查询最大记录数的hql
         String hql = "from Users ";

         //3.定义查询最大记录数的Query对象
         Query querypage = session.createQuery(hql);

         //4.查询最大记录数的数据
         querypage.setMaxResults(page.getPagesize());

         //5.确定查询起点
         querypage.setFirstResult(page.getStartrow());

         //6.分页查询
         List<Users> list = querypage.list();

         //7.关闭session
         Hibernate_Util.closeSession();

         return list;
     }

     /**
      * 8.查询总条数
      */
     public int getTotalCount() {
         //1.获取session
         Session session = Hibernate_Util.getSession();

         //2.定义查询总条数hql语句
         String hqlcount = "select count(*) from Users ";

         //3.利用Session创建Query对象
         Query querycount = session.createQuery(hqlcount);

         //4.获取总条数(返回单行数据uniqueResult())
         Integer totalCount = Integer.parseInt(querycount.uniqueResult().toString());
         //5.释放资源
         Hibernate_Util.closeSession();
         return totalCount;
     }
 }

UserDaoImpl

page层

 package com.bdqn.page;

 public class Page {
     private Integer pagesize; //页面大小
     private Integer pageno; //当前页
     private Integer startrow; //起始行
     private Integer totalpage; //总页数
     private Integer totalcount; //总条数

     public Page() {
     }

     public Page(Integer pageSize, Integer pageNo, Integer totalCount) {
         this.pagesize = pageSize; //页面大小
         this.pageno = pageNo;  //当前页
         this.totalcount = totalCount; //计算总条数
         this.setStartrow(pageNo, pageSize); //计算起始行
         this.setTotalpage(totalCount, pageSize); //计算总页数
     }

     public Integer getPagesize() {
         return pagesize;
     }

     public void setPagesize(Integer pageSize) {
         this.pagesize = pageSize;
     }

     public Integer getPageno() {
         return pageno;
     }

     public void setPageno(Integer pageNo) {
         this.pageno = pageNo;
     }

     public Integer getStartrow() {
         return startrow;
     }

     /**
      * 计算起始行
      *
      * @param pageNo
      * @param pageSize
      */
     public void setStartrow(Integer pageNo, Integer pageSize) {
         this.startrow = (pageNo - 1) * pageSize;
     }

     public Integer getTotalpage() {
         return totalpage;
     }

     /**
      * 计算总页数
      *
      * @param totalCount
      * @param pageSize
      */
     public void setTotalpage(Integer totalCount, Integer pageSize) {
         this.totalpage = totalCount % pageSize == 0 ? totalCount / pageSize : totalCount / pageSize + 1;
     }

     public Integer getTotalcount() {
         return totalcount;
     }

     public void setTotalCount(Integer totalCount) {
         this.totalcount = totalCount;
     }

     @Override
     public String toString() {
         return "[{\"pageno\":" + pageno + ",\"pagesize\":" + pagesize
                 + ",\"startrow\":" + startrow + ",\"totalcount\":" + totalcount
                 + ",\"totalpage\":" + totalpage + "}]";
     }
 }

Page

service层

 package com.bdqn.service;

 import com.bdqn.entity.Users;
 import com.bdqn.page.Page;

 import java.util.List;

 public interface UserService {
     /**
      * 1.登录的业务
      *
      * @param sname
      * @param password
      * @return
      */
     Users login(String sname, String password);

     /**
      * 2.注册
      *
      * @param stu
      * @return
      */
     int register(Users stu);

     /**
      * 3.查询所有
      */
     List<Users> findAll();

     /**
      * 4.根据主键id查询
      *
      * @param sid
      * @return
      */
     Users findById(Integer sid);

     /**
      * 5.修改
      */
     int update(Users stu);

     /**
      * 6.删除
      */
     int delete(Users stu);

     /**
      * 7.分页查询
      */
     List<Users> findPage(Page page);

     /**
      * 8.查询总条数
      */
     int getTotalCount();

 }

UserService

 package com.bdqn.service.impl;

 import com.bdqn.dao.UserDao;
 import com.bdqn.dao.impl.UserDaoImpl;
 import com.bdqn.entity.Users;
 import com.bdqn.page.Page;
 import com.bdqn.service.UserService;

 import java.util.List;

 public class UserServiceImpl implements UserService {
     /**
      * 使用多态引用数据访问层对象
      */
     private UserDao dao = new UserDaoImpl();

     /**
      * 登录
      */
     public Users login(String sname, String password) {
         return dao.findByNameAndPwd(sname, password);
     }

     public int delete(Users stu) {
         // TODO Auto-generated method stub
         return dao.delete(stu);
     }

     public List<Users> findAll() {
         // TODO Auto-generated method stub
         return dao.findAll();
     }

     public Users findById(Integer sid) {
         // TODO Auto-generated method stub
         return dao.findById(sid);
     }

     public int register(Users stu) {
         // TODO Auto-generated method stub
         return dao.save(stu);
     }

     public int update(Users stu) {
         // TODO Auto-generated method stub
         return dao.update(stu);
     }

     public List<Users> findPage(Page page) {
         // TODO Auto-generated method stub
         return dao.findPage(page);
     }

     public int getTotalCount() {
         // TODO Auto-generated method stub
         return dao.getTotalCount();
     }

 }

UserServiceImpl

servlet层

实现删除功能

 package com.bdqn.servlet;

 import com.bdqn.entity.Users;
 import com.bdqn.service.UserService;
 import com.bdqn.service.impl.UserServiceImpl;

 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;

 public class DeleteSerlvet extends HttpServlet {
     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

         this.doPost(request, response);
     }

     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
         request.setCharacterEncoding("UTF-8");
         response.setCharacterEncoding("UTF-8");
         response.setContentType("text/html;charset=UTF-8");

         // 2.接受参数
         Integer sid=Integer.valueOf(request.getParameter("id"));
         // 3.业务处理
         UserService service = new UserServiceImpl();
         Users stu=service.findById(sid);
         if (stu != null) {
             System.out.println("根据id查询成功");
             int num=service.delete(stu);
             if(num>0){
                 System.out.println("delete success!!");
                 // 4.页面跳转
                 response.sendRedirect("FindAllServlet");

             }else{
                 System.out.println("delete success!!");

             }
         } else {
             System.out.println("根据id查询失败!");

         }

     }

 }

DeleteSerlvet

实现统计总记录数功能

 package com.bdqn.servlet;

 import com.bdqn.entity.Users;
 import com.bdqn.page.Page;
 import com.bdqn.service.UserService;
 import com.bdqn.service.impl.UserServiceImpl;

 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.List;

 public class FindAllServlet extends HttpServlet {
     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

         this.doPost(request, response);
     }

     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
         request.setCharacterEncoding("UTF-8");
         response.setCharacterEncoding("UTF-8");
         response.setContentType("text/html;charset=UTF-8");

         /**
          * ☆
          * 在使用ajax往前台通过输出流对象的print方法发送json时
          * 该行获取输出流对象的代码必须放在
          * response.setContentType("text/html;charset=UTF-8");
          * 之后,否则ajax回调时,页面拿到的中文数据就永远都是乱码,
          * 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,
          * 所以,编码格式的处理应该放在获取PrintWriter对象之前
          *
          */
         PrintWriter out = response.getWriter();

         // 2.接受参数
         String no = request.getParameter("pageNo");

         // 3.业务处理
         UserService service = new UserServiceImpl();

         int pageSize = 3; //页面大小
         int pageNo = 1; //默认的pageNo为1
         if (no != null && no != "") {
             pageNo = Integer.valueOf(no);
         }
         //获取总条数
         int totalCount = service.getTotalCount();
         Page page = new Page(pageSize, pageNo, totalCount);

         List<Users> list = service.findPage(page);
         if (list != null) {
             System.out.println("find All page success");
             request.setAttribute("list", list);
             request.setAttribute("page", page);
             request.getRequestDispatcher("index.jsp").forward(request, response);
         } else {
             System.out.println("find All page fail!");

         }

     }
 }

FindAllServlet

实现根据条件查询功能

 package com.bdqn.servlet;

 import com.bdqn.entity.Users;
 import com.bdqn.service.UserService;
 import com.bdqn.service.impl.UserServiceImpl;

 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;

 public class FindByIdSerlvet extends HttpServlet {
     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

         this.doPost(request, response);
     }

     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
         request.setCharacterEncoding("UTF-8");
         response.setCharacterEncoding("UTF-8");
         response.setContentType("text/html;charset=UTF-8");

         // 2.接受参数
         Integer sid=Integer.valueOf(request.getParameter("id"));

         // 3.业务处理
         UserService service = new UserServiceImpl();

         Users stu=service.findById(sid);
         System.out.println("stu:"+stu);
         if(stu!=null){
             System.out.println("根据id查询到对象");
             request.setAttribute("stu", stu);
             request.getRequestDispatcher("update.jsp").forward(request, response);
         }else{
             System.out.println("没有根据id查询到对象");
         }

     }
 }

FindByIdSerlvet

实现分页功能

 package com.bdqn.servlet;

 import com.bdqn.entity.Users;
 import com.bdqn.page.Page;
 import com.bdqn.service.UserService;
 import com.bdqn.service.impl.UserServiceImpl;
 import com.fasterxml.jackson.databind.ObjectMapper;

 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.io.PrintWriter;
 import java.util.List;

 public class FindPageServlet extends HttpServlet {

     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

         this.doPost(request, response);
     }

     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
         response.setContentType("text/html;charset=UTF-8");
         request.setCharacterEncoding("UTF-8");
         response.setCharacterEncoding("UTF-8");
         /**
          * ☆
          * 在使用ajax往前台通过输出流对象的print方法发送json时
          * 该行获取输出流对象的代码必须放在
          * response.setContentType("text/html;charset=UTF-8");
          * 之后,否则ajax回调时,页面拿到的中文数据就永远都是乱码,
          * 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,
          * 所以,编码格式的处理应该放在获取PrintWriter对象之前
          *
          */
         PrintWriter out=response.getWriter();

         // 2.接受参数
         String no=request.getParameter("pageNo");

         // 3.业务处理
         UserService service = new UserServiceImpl();

         int pageSize=3; //页面大小
         int pageNo=1; //默认的pageNo为1
         if(no!=null && no!=""){
             pageNo=Integer.valueOf(no);
         }
         //获取总条数
         int totalCount=service.getTotalCount();
         //封装分页所需字段
         Page page=new Page(pageSize, pageNo, totalCount);
         //分页查询
         List<Users> list = service.findPage(page);

         ObjectMapper om=new ObjectMapper();
         String str=om.writeValueAsString(list);
         String pagestr=om.writeValueAsString(page);
         str="{\"page\":"+pagestr+",\"list\":"+str+"}";
         System.out.println(str);

         out.print(str);

     }
 }

FindPageServlet

实现登录功能

 package com.bdqn.servlet;

 import com.bdqn.entity.Users;
 import com.bdqn.service.UserService;
 import com.bdqn.service.impl.UserServiceImpl;

 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;

 public class LoginServlet extends HttpServlet {
     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

         this.doPost(request, response);
     }

     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
         request.setCharacterEncoding("UTF-8");
         response.setCharacterEncoding("UTF-8");
         response.setContentType("text/html;charset=UTF-8");

         //2.接受参数
         String name = request.getParameter("name");
         String password = request.getParameter("password");
         //3.业务处理
         UserService service = new UserServiceImpl();
         Users stu = service.login(name, password);
         if (stu != null) {
             System.out.println("login success!");
             //4.页面跳转
             request.getSession().setAttribute("name", name);
             response.sendRedirect("FindAllServlet");
         } else {
             System.out.println("login fail!");

         }

     }
 }

LoginServlet

实现添加功能

 package com.bdqn.servlet;

 import com.bdqn.entity.Users;
 import com.bdqn.service.UserService;
 import com.bdqn.service.impl.UserServiceImpl;

 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;

 public class RegisterServlet extends HttpServlet {
     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

         this.doPost(request, response);
     }

     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
         request.setCharacterEncoding("UTF-8");
         response.setCharacterEncoding("UTF-8");
         response.setContentType("text/html;charset=UTF-8");

         // 2.接受参数

         String name = request.getParameter("name");
         String password = request.getParameter("password");
         String telephone = request.getParameter("telephone");
         String username = request.getParameter("username");
         String isadmin = request.getParameter("isadmin");

         Users stu = new Users(name, password, telephone, username,isadmin);

         // 3.业务处理
         UserService service = new UserServiceImpl();
         int num = service.register(stu);
         if (num > 0) {
             System.out.println("register success!");
             response.sendRedirect("FindAllServlet");
         } else {
             System.out.println("register fail!");

         }

     }
 }

RegisterServlet

实现修改功能

 package com.bdqn.servlet;

 import com.bdqn.entity.Users;
 import com.bdqn.service.UserService;
 import com.bdqn.service.impl.UserServiceImpl;

 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;

 public class UpdateServlet extends HttpServlet {
     public void doGet(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {

         this.doPost(request, response);
     }

     public void doPost(HttpServletRequest request, HttpServletResponse response)
             throws ServletException, IOException {
         request.setCharacterEncoding("UTF-8");
         response.setCharacterEncoding("UTF-8");
         response.setContentType("text/html;charset=UTF-8");

         // 2.接受参数
         Integer id = Integer.valueOf(request.getParameter("id"));
         String name = request.getParameter("name");
         String password = request.getParameter("password");
         String telephone = request.getParameter("telephone");
         String username = request.getParameter("username");
         String isadmin = request.getParameter("isadmin");
         Users stu = new Users(id,name, password, telephone, username,isadmin);

         // 3.业务处理
         UserService service = new UserServiceImpl();
         int num=service.update(stu);
         if(num>0){
             System.out.println("update success!");
             response.sendRedirect("FindAllServlet");
         }else{
             System.out.println("update fail!");

         }

     }
 }

UpdateServlet

Util层

Hibernate封装类

 package com.bdqn.util;

 import org.hibernate.HibernateException;
 import org.hibernate.Session;
 import org.hibernate.SessionFactory;
 import org.hibernate.cfg.Configuration;

 public class Hibernate_Util {
     private static ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
     private static Configuration configuration = null;
     private static SessionFactory sessionFactory = null;

     static {

         try {
             configuration = new Configuration().configure("/hibernate.cfg.xml");
             sessionFactory = configuration.buildSessionFactory();
         } catch (HibernateException e) {
             System.out.println("解析xml和创建Session工厂error");
             e.printStackTrace();
         }

     }

     public static Session getSession() {
         Session session = threadLocal.get();
         if (session == null) {
             session = sessionFactory.openSession();
             threadLocal.set(session);
         }
         return session;
     }

     public static void closeSession() {
         Session session = threadLocal.get();
         if (session != null) {
             threadLocal.set(null);
             session.close();
         }
     }
 }

Hibernate_Util

JSP

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 <%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 <%
     String path = request.getContextPath();
     String basePath = request.getScheme() + "://"
             + request.getServerName() + ":" + request.getServerPort()
             + path + "/";
 %>

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
 <head>
     <base href="<%=basePath%>">

     <title>My JSP 'index.jsp' starting page</title>
     <meta http-equiv="pragma" content="no-cache">
     <meta http-equiv="cache-control" content="no-cache">
     <meta http-equiv="expires" content="0">
     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
     <meta http-equiv="description" content="This is my page">
     <!--
 <link rel="stylesheet" type="text/css" href="styles.css">
 -->
     <script type="text/javascript" src="js/jquery-1.8.3.js"></script>
     <script type="text/javascript" src="js/ajaxindex.js"></script>
 </head>

 <body>
 <CENTER>

     <table></table>
     <div>
         第<span id="pageNo"></span>/<span id="totalPage"></span>页   &nbsp;&nbsp;
         <a href="javascript:void(0);" class="apage">首页</a>  &nbsp;&nbsp;
         <a href="javascript:void(0);" class="apage">上一页</a> &nbsp;&nbsp;
         <a href="javascript:void(0);" class="apage">下一页</a> &nbsp;&nbsp;
         <a href="javascript:void(0);" class="apage">末页</a>&nbsp;&nbsp;
         共<span id="totalCount"></span>条
     </div>

 </CENTER>

 </body>
 </html>

 ajaxindex.jsp

ajaxindex.jsp

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8" %>
 <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
 <%
     String path = request.getContextPath();
     String basePath = request.getScheme() + "://"
             + request.getServerName() + ":" + request.getServerPort()
             + path + "/";
 %>

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
 <head>
     <base href="<%=basePath%>">

     <title>My JSP 'index.jsp' starting page</title>
     <meta http-equiv="pragma" content="no-cache">
     <meta http-equiv="cache-control" content="no-cache">
     <meta http-equiv="expires" content="0">
     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
     <meta http-equiv="description" content="This is my page">
     <!--
 <link rel="stylesheet" type="text/css" href="styles.css">
 -->
 </head>

 <body>
 <CENTER>
     <table border="1px" width="60%">
         <tr>
             <td colspan="6">
                 <a href="register.jsp">注册</a>
             </td>
         </tr>
         <tr>
             <td>
                 用户编号
             </td>
             <td>
                 用户名
             </td>
             <td>
                 密码
             </td>
             <td>
                 电话
             </td>
             <td>
                 姓名
             </td>
             <td>
                 操作
             </td>
         </tr>

         <c:forEach var="i" items="${list}">
             <tr>
                 <td>
                         ${i.id }
                 </td>
                 <td>
                         ${i.name }
                 </td>
                 <td>
                         ${i.password }
                 </td>
                 <td>
                         ${i.telephone }
                 </td>

                 <td>
                         ${i.username }
                 </td>
                 <td>
                     <a href="FindByIdSerlvet?id=${i.id}">修改</a>
                     &nbsp;&nbsp;
                     <a href="DeleteSerlvet?id=${i.id}">删除</a>

                 </td>
             </tr>
         </c:forEach>

     </table>
     <div>

         第${page.pageno}/${page.totalpage}页 &nbsp;&nbsp;
         <a href="FindAllServlet?pageNo=1">首页</a>
         <c:choose>
             <c:when test="${page.pageno gt 1}">
                 <a href="FindAllServlet?pageNo=${page.pageno-1 }">上一页</a>
             </c:when>
             <c:otherwise>
                 <a href="javascript:alert('已经是第一页了,没有上一页!');">上一页</a>
             </c:otherwise>
         </c:choose>
         <c:choose>
             <c:when test="${page.pageno lt page.totalpage}">
                 <a href="FindAllServlet?pageNo=${page.pageno+1 }">下一页</a>
             </c:when>
             <c:otherwise>
                 <a href="javascript:alert('已经是最有一页了,没有下一页!');">下一页</a>
             </c:otherwise>
         </c:choose>

         <a href="FindAllServlet?pageNo=${page.totalpage}">末页</a>
         &nbsp;&nbsp;
         共${page.totalcount}条

     </div>

 </CENTER>

 </body>
 </html>

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://"
            + request.getServerName() + ":" + request.getServerPort()
            + path + "/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">
    <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
    <meta http-equiv="description" content="This is my page">
    <!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>

<body>
<center>
    <fieldset style="width: 300px;">
        <legend>
            登录
        </legend>
        <form action="LoginServlet" method="post">
            <table>
                <tr>
                    <td>
                        用户名:
                    </td>
                    <td>
                        <input type="text" name="name" />
                    </td>
                </tr>
                <tr>
                    <td>
                        密码:
                    </td>
                    <td>
                        <input type="password" name="password" />
                    </td>
                </tr>
                <tr>
                    <td>
                        <input type="submit" value="提交" />
                    </td>
                    <td>
                        <input type="reset" value="重置" />
                    </td>
                </tr>
            </table>
        </form>
    </fieldset>
</center>
</body>
</html>

long.jsp

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8" %>
 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
 <%
     String path = request.getContextPath();
     String basePath = request.getScheme() + "://"
             + request.getServerName() + ":" + request.getServerPort()
             + path + "/";
 %>

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
 <head>
     <base href="<%=basePath%>">

     <title>My JSP 'index.jsp' starting page</title>
     <meta http-equiv="pragma" content="no-cache">
     <meta http-equiv="cache-control" content="no-cache">
     <meta http-equiv="expires" content="0">
     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
     <meta http-equiv="description" content="This is my page">
     <!--
 <link rel="stylesheet" type="text/css" href="styles.css">
 -->
 </head>

 <body>
 <center>
     <fieldset style="width: 300px;">
         <legend>
             注册
         </legend>
         <form action="RegisterServlet" method="post">
             <table>
                 <tr>
                     <td>
                         用户名:
                     </td>
                     <td>
                         <input type="text" name="name"/>
                     </td>
                 </tr>
                 <tr>
                     <td>
                         密码:
                     </td>
                     <td>
                         <input type="password" name="password"/>
                     </td>
                 </tr>
                 <tr>
                     <td>
                         电话:
                     </td>
                     <td>
                         <input type="text" name="telephone"/>
                     </td>
                 </tr>
                 <tr>
                     <td>
                         姓名:
                     </td>
                     <td>
                         <input type="text" name="username"/>
                     </td>
                 </tr>
                 <tr>
                     <td>
                         <input type="submit" value="修改"/>
                     </td>
                     <td>
                         <input type="reset" value="重置"/>
                     </td>
                 </tr>
             </table>
         </form>
     </fieldset>
 </center>
 </body>
 </html>

register.jsp

 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
 <%
     String path = request.getContextPath();
     String basePath = request.getScheme() + "://"
             + request.getServerName() + ":" + request.getServerPort()
             + path + "/";
 %>

 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 <html>
 <head>
     <base href="<%=basePath%>">
     <title>My JSP 'index.jsp' starting page</title>
     <meta http-equiv="pragma" content="no-cache">
     <meta http-equiv="cache-control" content="no-cache">
     <meta http-equiv="expires" content="0">
     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
     <meta http-equiv="description" content="This is my page">
     <!--
 <link rel="stylesheet" type="text/css" href="styles.css">
 -->
 </head>

 <body>
 <center>
     <fieldset style="width: 300px;">
         <legend>
             <br>修改
         </legend>
         <form action="UpdateServlet?id=${stu.id}" method="post">
             <table border="1px" width="60%">
                 <tr>
                     <td>
                         用户名:
                     </td>
                     <td>
                         <input type="text" name="name" value="${stu.name}"/>
                     </td>
                 </tr>
                 <tr>
                     <td>
                         密码:
                     </td>
                     <td>
                         <input type="password" name="password" value="${stu.password}"/>
                     </td>
                 </tr>
                 <tr>
                     <td>
                         电话:
                     </td>
                     <td>
                         <input type="text" name="telephone" value="${stu.telephone}"/>
                     </td>
                 </tr>
                 <tr>
                     <td>
                         姓名:
                     </td>
                     <td>
                         <input type="text" name="username" value="${stu.username}"/>
                     </td>
                 </tr>

                 <tr>
                     <td>
                         <input type="submit" value="修改" />
                     </td>
                     <td>
                         <input type="reset" value="重置" />
                     </td>
                 </tr>
             </table>
         </form>
     </fieldset>
 </center>
 </body>
 </html>

update.jsp