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', '123', 18);
insert into USERINFO (id, uname, password, age)
values (seq_userinfo.nextval, '石头', '123', 18);
insert into USERINFO (id, uname, password, age)
values (seq_userinfo.nextval, '朱亚楠', '123', 18);
insert into USERINFO (id, uname, password, age)
values (seq_userinfo.nextval, '大嘴', '123', null);
commit;

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 + "]";
    }
    

}

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();

}

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>

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

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   

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>

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);
    }

}

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;
    }

    

}

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 + "]";
    }

}

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();

    }

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();
    }

}

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;
    }

    
}

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>

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>

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="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>

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="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="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>

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>

24.运行结果如下