4、mybatis动态sql+struts2（通配符+全局配置+分页）

1.创建userinfo.sql数据库脚本

 create table USERINFO

 (

   id       NUMBER not null,

   uname    VARCHAR2(20),

   password VARCHAR2(20),

   age      NUMBER

 )

 ;

 alter table USERINFO add primary key (ID);

 create sequence seq_userinfo;

 insert into USERINFO (id, uname, password, age)

 values (seq_userinfo.nextval, 'holly', '', 18);

 insert into USERINFO (id, uname, password, age)

 values (seq_userinfo.nextval, '石头', '', 18);

 insert into USERINFO (id, uname, password, age)

 values (seq_userinfo.nextval, '朱亚楠', '', 18);

 insert into USERINFO (id, uname, password, age)

 values (seq_userinfo.nextval, '大嘴', '', null);

 commit;

userinfo.sql

2.创建如下项目结构

3.在项目WebRoot的WEB-INF下的lib中加入如下jar文件

4.在com.entity包下创建UserInfo.java

 package com.entity;

 import com.page.Page;

 /**

  * 用户信息表

  * @author pc

  *

  */

 public class UserInfo {

     private Integer id;

     private String uname;

     private String password;

     private Page page; //分页数据封装类

     public UserInfo() {

     }

     public UserInfo(Integer id) {

         this.id = id;

     }

     public UserInfo(Page page) {

         this.page = page;

     }

     public UserInfo(String uname, String password) {

         this.uname = uname;

         this.password = password;

     }

     public UserInfo(Integer id, String uname, String password) {

         this.id = id;

         this.uname = uname;

         this.password = password;

     }

     public Integer getId() {

         return id;

     }

     public void setId(Integer id) {

         this.id = id;

     }

     public String getUname() {

         return uname;

     }

     public void setUname(String uname) {

         this.uname = uname;

     }

     public String getPassword() {

         return password;

     }

     public void setPassword(String password) {

         this.password = password;

     }

     public Page getPage() {

         return page;

     }

     public void setPage(Page page) {

         this.page = page;

     }

     @Override

     public String toString() {

         return "UserInfo [id=" + id + ", password=" + password + ", uname="

                 + uname + "]";

     }

 }

UserInfo.java

5.在com.mapper包下创建UserInfoMapper.java映射接口

 package com.mapper;

 import java.util.List;

 import com.entity.UserInfo;

 public interface UserInfoMapper {

     /**

      * 根据id查询

      * @param id

      * @return

      */

     //public UserInfo getById(int id);

     /**

      * 根据对象查询对象

      * @param user

      * @return

      */

     //public UserInfo getByNamePwd(UserInfo user);

     /**

      * 查询所有和根据条件查询

      * @return

      */

     public List<UserInfo> getAllAndWhere(UserInfo user);

     /**

      * 添加

      * @param user

      * @return

      */

     public Integer saveUser(UserInfo user);

     /**

      * 修改

      * @param user

      * @return

      */

     public Integer updateUser(UserInfo user);

     /**

      * 根据id删除

      * @param id

      * @return

      */

     public Integer deleteUser(int id);

     /**

      * 查询总记录数

      * @return

      */

     public Integer getTotalCount();

 }

UserInfoMapper.java

6.在com.mapper包下创建UserInfoMapper.xml映射文件

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

 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >

 <mapper namespace="com.mapper.UserInfoMapper">

     <!-- 查询所有和根据条件查询 -->

     <select id="getAllAndWhere" parameterType="User" resultType="User">

         <choose>

             <!-- 分页查询 -->

             <when test="page!=null">

               <![CDATA[

                select * from

                 (

                   select rownum r,id,uname,password from userinfo

                    where rownum<=#{page.startrow}

                 )u

                 where u.r>#{page.endrow}

                 ]]>

             </when>

             <otherwise>

                 select * from userinfo

                 <where>

                     <choose>

                         <!-- 根据用户名和密码查询 -->

                         <when test="uname!=null and password!=null">

                             and uname=#{uname} and password=#{password}

                         </when>

                         <otherwise>

                             <!-- 根据id查询 -->

                             <if test="id!=null">

                                 and id=#{id}

                             </if>

                         </otherwise>

                     </choose>

                 </where>

             </otherwise>

         </choose>

     </select>

     <!-- 修改 -->

     <update id="updateUser" parameterType="User">

         update userinfo set uname=#{uname},password=#{password} where id=#{id}

     </update>

     <!-- 添加 -->

     <insert id="saveUser" parameterType="User">

         insert into userinfo(id,uname,password)

         values(seq_userinfo.nextval,#{uname},#{password})

    </insert>

     <!-- 删除 -->

     <delete id="deleteUser" parameterType="int">

         delete from userinfo where id=#{id}

    </delete>

     <!-- 查询总条数 -->

     <select id="getTotalCount" resultType="Integer">

         select count(*) from userinfo

    </select>

 </mapper>

UserInfoMapper.xml

7.在src下创建jdbc.properties的连接数据库的属性文件

 driver=oracle.jdbc.driver.OracleDriver

 url=jdbc\:oracle\:thin\:@127.0.0.1\:1521\:orcl

 username=holly

 password=sys

jdbc.properties

8.在src下创建日志文件log4j.properties属性文件

 log4j.rootLogger=DEBUG, Console  

 #Console

 log4j.appender.Console=org.apache.log4j.ConsoleAppender

 log4j.appender.Console.layout=org.apache.log4j.PatternLayout

 log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n  

 log4j.logger.java.sql.ResultSet=INFO

 log4j.logger.org.apache=INFO

 log4j.logger.java.sql.Connection=DEBUG

 log4j.logger.java.sql.Statement=DEBUG

 log4j.logger.java.sql.PreparedStatement=DEBUG

log4j.properties

9.在src下创建mybatis的主配置文件configuration.xml

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

 <!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd" >

 <configuration>

   <!-- 引用属性文件 -->

   <properties resource="jdbc.properties"/>

   <!-- 定义别名 -->

   <typeAliases>

     <typeAlias type="com.entity.UserInfo" alias="User"/>

   </typeAliases>

   <!-- 数据源配置 -->

   <environments default="development">

     <environment id="development">

       <transactionManager type="JDBC"/>

       <dataSource type="POOLED">

         <property name="driver" value="${driver}"/>

         <property name="url" value="${url}"/>

         <property name="username" value="${username}"/>

         <property name="password" value="${password}"/>

       </dataSource>

     </environment>

   </environments>

 <!-- 注册映射文件 -->

 <mappers>

   <mapper resource="com/mapper/UserInfoMapper.xml"/>

 </mappers>

 </configuration>

configuration.xml

10.在com.util包下创建获取SqlSession对象的MyBatisUtil.java工具类

 package com.util;

 import java.io.IOException;

 import java.io.Reader;

 import org.apache.ibatis.io.Resources;

 import org.apache.ibatis.session.SqlSession;

 import org.apache.ibatis.session.SqlSessionFactory;

 import org.apache.ibatis.session.SqlSessionFactoryBuilder;

 /**

  * 获取Sqlsession工具类

  * @author pc

  *

  */

 public class MyBatisUtil {

     private static SqlSessionFactory sqlSessionFactory=null;

     static{

         try {

             Reader reader=Resources.getResourceAsReader("configuration.xml");

             sqlSessionFactory=new SqlSessionFactoryBuilder().build(reader);

         } catch (IOException e) {

             e.printStackTrace();

         }

     }

     public static SqlSession getSqlSession(boolean isCommit){

         return sqlSessionFactory.openSession(isCommit);

     }

 }

MyBatisUtil.java

11.在com.mapper.impl包下创建UserInfoMapperImpl.java映射接口实现类

 package com.mapper.impl;

 import java.util.List;

 import org.apache.ibatis.session.SqlSession;

 import com.entity.UserInfo;

 import com.mapper.UserInfoMapper;

 import com.util.MyBatisUtil;

 public class UserinfoMapperImpl implements UserInfoMapper {

     private SqlSession sqlsession=null;

     /**

      * 删除

      */

     public Integer deleteUser(int id) {

         sqlsession=MyBatisUtil.getSqlSession(true);

         UserInfoMapper mapper=sqlsession.getMapper(UserInfoMapper.class);

         Integer num=mapper.deleteUser(id);

         sqlsession.close();

         return num;

     }

    /**

     * 登录和各种查

     */

     public List<UserInfo> getAllAndWhere(UserInfo user) {

         sqlsession=MyBatisUtil.getSqlSession(false);

         UserInfoMapper mapper=sqlsession.getMapper(UserInfoMapper.class);

         List<UserInfo> list=mapper.getAllAndWhere(user);

         sqlsession.close();

         return list;

     }

    /**

     * 添加

     */

     public Integer saveUser(UserInfo user) {

         sqlsession=MyBatisUtil.getSqlSession(true);

         UserInfoMapper mapper=sqlsession.getMapper(UserInfoMapper.class);

         Integer num=mapper.saveUser(user);

         sqlsession.close();

         return num;

     }

     /**

      * 修改

      */

     public Integer updateUser(UserInfo user) {

         sqlsession=MyBatisUtil.getSqlSession(true);

         UserInfoMapper mapper=sqlsession.getMapper(UserInfoMapper.class);

         Integer num=mapper.updateUser(user);

         sqlsession.close();

         return num;

     }

     /**

      * 查询总条数

      */

     public Integer getTotalCount() {

         sqlsession=MyBatisUtil.getSqlSession(true);

         UserInfoMapper mapper=sqlsession.getMapper(UserInfoMapper.class);

         Integer num=mapper.getTotalCount();

         sqlsession.close();

         return num;

     }

 }

UserinfoMapperImpl.java

12.在com.page包下创建Page.java分页数据封装类

 package com.page;

 public class Page {

     private Integer pagesize; // 页面大小

     private Integer pageno; // 当前页

     private Integer totalcount; // 总记录数

     private Integer totalpage;

     private Integer startrow; // 开始行

     private Integer endrow; // 结束行

     public Page() {

     }

     /*public Page(Integer totalcount) {

         this.setTotalpage(totalcount);

     }*/

     public Page(Integer pagesize, Integer pageno,Integer totalcount) {

         this.pageno=pageno;

         this.pagesize=pagesize;

         this.endrow = (pageno - 1) * pagesize;

         this.startrow = pageno * pagesize;

         this.setTotalpage(totalcount);

     }

     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 getTotalcount() {

         return totalcount;

     }

     public void setTotalcount(Integer totalcount) {

         this.totalcount = totalcount;

     }

     public Integer getTotalpage() {

         return totalpage;

     }

     public void setTotalpage(Integer totalcount) {

         this.setTotalcount(totalcount);

         this.totalpage = totalcount % pagesize == 0 ? totalcount / pagesize

                 : totalcount / pagesize + 1;

     }

     public Integer getStartrow() {

         return startrow;

     }

     public void setStartrow(Integer startrow) {

         this.startrow = startrow;

     }

     public Integer getEndrow() {

         return endrow;

     }

     public void setEndrow(Integer endrow) {

         this.endrow = endrow;

     }

     @Override

     public String toString() {

         return "Page [endrow=" + endrow + ", pageno=" + pageno + ", pagesize="

                 + pagesize + ", startrow=" + startrow + ", totalcount="

                 + totalcount + ", totalpage=" + totalpage + "]";

     }

 }

Page.java

13.在com.service包下创建UserInfoService.java业务接口

package com.service;

import java.util.List;

import com.entity.UserInfo;

/**

 * 服务层接口

 * @author pc

 *

 */

public interface UserInfoService {

    /**

     * 根据id查询

     * @param id

     * @return

     */

    //public UserInfo getById(int id);

    /**

     * 根据对象查询对象

     * @param user

     * @return

     */

    //public UserInfo getByNamePwd(UserInfo user);

    /**

     * 查询所有和根据条件查询

     * @return

     */

    public List<UserInfo> getAllAndWhere(UserInfo user);

    /**

     * 添加

     * @param user

     * @return

     */

    public Integer saveUser(UserInfo user);

    /**

     * 修改

     * @param user

     * @return

     */

    public Integer updateUser(UserInfo user);

    /**

     * 根据id删除

     * @param id

     * @return

     */

    public Integer deleteUser(int id);

    /**

     * 查询总记录数

     * @return

     */

    public Integer getTotalCount();

    }

UserInfoService.java

14.在com.service.impl包下创建UserInfoServiceImpl.java业务接口实现类

 package com.service.impl;

 import java.util.List;

 import com.entity.UserInfo;

 import com.mapper.UserInfoMapper;

 import com.mapper.impl.UserinfoMapperImpl;

 import com.service.UserInfoService;

 public class UserInfoServiceImpl implements UserInfoService {

     UserInfoMapper mapper=new UserinfoMapperImpl();

     public Integer deleteUser(int id) {

         return mapper.deleteUser(id);

     }

     public Integer updateUser(UserInfo user) {

         return mapper.updateUser(user);

     }

     public List<UserInfo> getAllAndWhere(UserInfo user) {

         return mapper.getAllAndWhere(user);

     }

     public Integer saveUser(UserInfo user) {

         return mapper.saveUser(user);

     }

     public Integer getTotalCount() {

         // TODO Auto-generated method stub

         return mapper.getTotalCount();

     }

 }

UserInfoServiceImpl.java

15.在com.action包下创建Struts2的控制器类UserInfoAction.java

 package com.action;

 import java.util.List;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpSession;

 import org.apache.struts2.ServletActionContext;

 import com.entity.UserInfo;

 import com.opensymphony.xwork2.ActionSupport;

 import com.page.Page;

 import com.service.UserInfoService;

 import com.service.impl.UserInfoServiceImpl;

 /**

  * //1.获取request，session的方法1：解耦方式 ActionContext ac=

  * ActionContext.getContext(); //1.1将数据放给request对象集合

  * Map<String, Object> requestMap=(Map<String, Object>)

  * ac.get("request"); //就相当于setAttribute(key,value)；

  * requestMap.put("list", "list");

  *

  * //1.2.获取session对象集合 Map<String, Object>

  * sessionMap=ac.getSession(); sessionMap.put("uname",

  * loginlist.get(0).getUname());

  */

 public class UserInfoAction extends ActionSupport {

     UserInfoService service = new UserInfoServiceImpl();

     /**

      * 该对象接受表单的值(代理对象通过setter和getter)

      */

     private UserInfo user;

     /**

      * 封装page对象的

      */

     private Page page;

     /**

      * 1.登录

      *

      * @return

      */

     public String login() {

         if (user!= null) {

             System.out.println("参数已经接到");

             // 业务处理

             List<UserInfo> loginlist = service.getAllAndWhere(user);

              UserInfo useinfo=loginlist.get(0);

             if (useinfo != null) {

                 System.out.println("登录成功");

                     // 2.获取request，session的方法2：耦合方式

                     // 2.1获取request对象

                    HttpServletRequest request = ServletActionContext

                             .getRequest();

 //                    request.setAttribute("list", "list");

                     // 2.2获取session对象

                     HttpSession session = request.getSession();

                     session.setAttribute("uname", useinfo.getUname());

               return SUCCESS;

             } else {

                 System.out.println("登录失败");

                 return ERROR;

             }

         } else {

             System.out.println("参数没有接到");

             return ERROR;

         }

     }

     /**

     * 2.查询所有

     * @return

     */

     public String findAll(){

         HttpServletRequest request=ServletActionContext.getRequest();

         //查单条

         Integer totalCount=service.getTotalCount();

         Integer pageNo=1;

         if(page!=null){

             pageNo=page.getPageno();

         }

          page=new Page(2, pageNo, totalCount);

          System.out.println("page:"+page);

         //如果page对象为空=查询所有，如果page对象不为空=分页查询

         UserInfo u=new UserInfo(page);

         System.out.println("分页对象"+page);

         List<UserInfo> list=service.getAllAndWhere(u);

         if(list!=null){

             System.out.println("查询所有，查到了...");

             request.setAttribute("list", list);

             request.setAttribute("page", page);

             return SUCCESS;

         }else{

             System.out.println("查询所有，没有查到...");

             return ERROR;

         }

     }

     /**

      *3. 根据id查询

      * @return

      */

     public String findById(){

         Integer id=user.getId();

         if(id!=null){

             System.out.println("id接到了..");

             List<UserInfo> list=service.getAllAndWhere(user);

             UserInfo userinfo=list.get(0);

             if(userinfo!=null){

                 System.out.println("根据id查到了");

                 HttpServletRequest request=ServletActionContext.getRequest();

                 request.setAttribute("upuser", userinfo);

                 return SUCCESS;

             }else{

                 System.out.println("根据id没有查到");

                 return ERROR;

             }

         }else{

             System.out.println("id没有接到...");

           return ERROR;

         }

     }

     /**

      * 4.注册

      * @return

      */

     public String register(){

         if(user!=null){

             System.out.println("参数接到了..");

             Integer num=service.saveUser(user);

             if(num>0){

                 System.out.println("注册成功...");

                 return SUCCESS;

             }else{

                 System.out.println("注册失败...");

                 return ERROR;

             }

         }else{

             System.out.println("参数没有接到..");

             return ERROR;

         }

     }

     /**

      * 5.修改

      * @return

      */

     public String update(){

         if(user!=null){

             System.out.println("参数接到了..");

             Integer num=service.updateUser(user);

             if(num>0){

                 System.out.println("修改成功");

                 return SUCCESS;

             }else{

                 System.out.println("修改失败");

                 return ERROR;

             }

         }else{

             System.out.println("参数没有接到..");

             return ERROR;

         }

     }

     /**

      * 6.删除

      * @return

      */

     public String delete(){

         if(user.getId()!=null){

            System.out.println("id接到了");

            int num=service.deleteUser(user.getId());

            if(num>0){

                System.out.println("删除成功");

                return SUCCESS;

            }else{

                System.out.println("删除失败");

                return ERROR;

            }

         }else{

             System.out.println("id没有接到");

             return ERROR;

         }

     }

     public UserInfo getUser() {

         return user;

     }

     public void setUser(UserInfo user) {

         this.user = user;

     }

     public Page getPage() {

         return page;

     }

     public void setPage(Page page) {

         this.page = page;

     }

 }

UserInfoAction.java

16.在src下创建struts.xml文件

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

 <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN" "struts-2.1.7.dtd" >

 <struts>

    <!-- 处理中文乱码 -->

    <constant name="struts.i18n.encoding" value="UTF-8"/>

    <package name="default" namespace="/" extends="struts-default">

     <!--

             配置全局action节点的result，reuslt是公用的，

             全局配置不能和默认配置一起使用

     -->

     <global-results>

        <result name="error">error.jsp</result>

     </global-results>

     <!-- 登录，修改，删除,注册 形成一个动态调用=通配符使用 -->

     <action name="*" class="com.action.UserInfoAction" method="{1}">

         <result name="success" type="redirectAction">findAll</result>

     </action>

      <!-- 查询所有  -->

      <action name="findAll" class="com.action.UserInfoAction" method="findAll">

         <result name="success">index.jsp</result>

      </action>

       <!-- 查单条 -->

       <action name="findById" class="com.action.UserInfoAction" method="findById">

         <result name="success">update.jsp</result>

      </action>

      <!-- 登陆

      <action name="login" class="com.action.UserInfoAction" method="login">

         <result name="success" type="redirectAction">findAll</result>

      </action>

      -->

      <!-- 修改

      <action name="update" class="com.action.UserInfoAction" method="update">

         <result name="success" type="redirectAction">findAll</result>

      </action>

      -->

      <!-- 添加

       <action name="register" class="com.action.UserInfoAction" method="register">

         <result name="success">login.jsp</result>

      </action>

       -->

        <!-- 删除

       <action name="delete" class="com.action.UserInfoAction" method="delete">

         <result name="success" type="redirectAction">findAll</result>

      </action>

       -->

   </package>

 </struts>

struts.xml

17.编辑WebRoot下WEB-INF下的web.xml文件

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

 <web-app version="2.5"

     xmlns="http://java.sun.com/xml/ns/javaee"

     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee

     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

   <welcome-file-list>

     <welcome-file>login.jsp</welcome-file>

   </welcome-file-list>

   <filter>

     <filter-name>struts2</filter-name>

     <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>

   </filter>

   <filter-mapping>

     <filter-name>struts2</filter-name>

     <url-pattern>*.action</url-pattern>

   </filter-mapping>

 </web-app>

web.xml

18.在WebRoot下创建js文件夹加入jquery-1.8.3.js文件

19.在WebRoot下创建login.jsp登录页面

 <%@ 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="login.action" method="post">

           <table>

             <tr>

               <td>用户名:</td>

               <td><input type="text" name="user.uname"/></td>

             </tr>

             <tr>

               <td>密码：</td>

               <td><input type="password" name="user.password"/></td>

             </tr>

             <tr>

               <td><input type="submit" value="登录"/></td>

             </tr>

           </table>

         </form>

       </fieldset>

     </center>

   </body>

 </html>

20.在WebRoot下创建index.jsp首页面

 <%@ 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">

     <script type="text/javascript" src="js/jquery-1.8.3.js"></script>

     <script type="text/javascript">

       $(function(){

         $("tr:odd").css("background-color","#ccc");

       });

     </script>

   </head>

   <body>

     <center>

      <h1>欢迎${uname}登录成功！</h1>

       <table>

         <tr><td colspan="2"><a href="register.jsp">注册</a></td></tr>

         <tr><td>编号</td><td>姓名</td><td>密码</td><td>操作</td></tr>

         <c:forEach var="i" items="${list}">

         <tr><td>${i.id}</td><td>${i.uname}</td><td>${i.password}</td>

         <td><a href="findById.action?user.id=${i.id}">修改</a>&nbsp;|&nbsp;<a href="delete.action?user.id=${i.id}">删除</a></td></tr>

         </c:forEach>

       </table>

       当前第${page.pageno}/${page.totalpage }页 &nbsp;&nbsp;

       <a href="findAll.action?page.pageno=1">首页</a> &nbsp;&nbsp;

       <c:choose>

         <c:when test="${page.pageno > 1}">

           <a href="findAll.action?page.pageno=${page.pageno-1}">上一页</a> &nbsp;&nbsp;

         </c:when>

         <c:otherwise>

          <a href="javascript:alert('已经是第一页！');">上一页</a> &nbsp;&nbsp;

         </c:otherwise>

       </c:choose>

       <c:choose>

         <c:when test="${page.pageno<page.totalpage}">

         <a href="findAll.action?page.pageno=${page.pageno+1}">下一页</a> &nbsp;&nbsp;

         </c:when>

         <c:otherwise>

           <a href="javascript:alert('已经是最后一页！');">上一页</a> &nbsp;&nbsp;

         </c:otherwise>

       </c:choose>

       <a href="findAll.action?page.pageno=${page.totalpage}">末页</a>

     </center>

   </body>

 </html>

index.jsp

21.在WebRoot下创建register.jsp注册页面

 <%@ 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>注册</legend>

         <form action="register.action" method="post">

           <table>

             <tr>

               <td>用户名:</td>

               <td><input type="text" name="user.uname"/></td>

             </tr>

             <tr>

               <td>密码：</td>

               <td><input type="password" name="user.password"/></td>

             </tr>

             <tr>

               <td><input type="submit" value="注册"/></td>

             </tr>

           </table>

         </form>

       </fieldset>

     </center>

   </body>

 </html>

22.在WebRoot下创建update.jsp修改页面

 <%@ 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>修改用户信息</legend>

         <form action="update.action?user.id=${upuser.id}" method="post">

           <table>

             <tr>

               <td>用户名:</td>

               <td><input type="text" name="user.uname" value="${upuser.uname}"/></td>

             </tr>

             <tr>

               <td>密码：</td>

               <td><input type="password" name="user.password" value="${upuser.password}"/></td>

             </tr>

             <tr>

               <td><input type="submit" value="注册"/></td>

             </tr>

           </table>

         </form>

       </fieldset>

     </center>

   </body>

 </html>

update.jsp

23.在error.jsp下创建error.jsp错误页面

 <%@ 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>

        业务处理失败！！

   </body>

 </html>

error.jsp

24.运行结果如下

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