795~797 修改分析，用户回显，用户修改

修改功能分析

 

 

 

 

 

 更改修改的list按钮

数据回显

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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
    <head>
        <!-- 指定字符集 -->
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>修改用户</title>
 
        <link href="css/bootstrap.min.css" rel="stylesheet">
        <script src="js/jquery-2.1.0.min.js"></script>
        <script src="js/bootstrap.min.js"></script>
         
    </head>
    <body>
        <div class="container" style="width: 400px;">
        <h3 style="text-align: center;">修改联系人</h3>
        <form action="${pageContext.request.contextPath}/updateUserServlet" method="post">
            <!--  隐藏域 提交id-->
            <input type="hidden" name="id" value="${user.id}">
 
          <div class="form-group">
            <label for="name">姓名：</label>
            <input type="text" class="form-control" id="name" name="name"  value="${user.name}" readonly="readonly" placeholder="请输入姓名" />
          </div>
 
          <div class="form-group">
            <label>性别：</label>
              <c:if test="${user.gender == '男'}">
                  <input type="radio" name="gender" value="男" checked />男
                  <input type="radio" name="gender" value="女"  />女
              </c:if>
 
              <c:if test="${user.gender == '女'}">
                  <input type="radio" name="gender" value="男"  />男
                  <input type="radio" name="gender" value="女" checked  />女
              </c:if>
 
 
          </div>
 
          <div class="form-group">
            <label for="age">年龄：</label>
            <input type="text" class="form-control" value="${user.age}" id="age"  name="age" placeholder="请输入年龄" />
          </div>
 
          <div class="form-group">
            <label for="address">籍贯：</label>
             <select name="address" id="address" class="form-control" >
                 <c:if test="${user.address == '陕西'}">
                    <option value="陕西" selected>陕西</option>
                    <option value="北京">北京</option>
                    <option value="上海">上海</option>
                 </c:if>
 
                 <c:if test="${user.address == '北京'}">
                     <option value="陕西" >陕西</option>
                     <option value="北京" selected>北京</option>
                     <option value="上海">上海</option>
                 </c:if>
 
                 <c:if test="${user.address == '上海'}">
                     <option value="陕西" >陕西</option>
                     <option value="北京">北京</option>
                     <option value="上海" selected>上海</option>
                 </c:if>
            </select>
          </div>
 
          <div class="form-group">
            <label for="qq">QQ：</label>
            <input type="text" id="qq" class="form-control" value="${user.qq}" name="qq" placeholder="请输入QQ号码"/>
          </div>
 
          <div class="form-group">
            <label for="email">Email：</label>
            <input type="text" id="email" class="form-control" value="${user.email}" name="email" placeholder="请输入邮箱地址"/>
          </div>
 
             <div class="form-group" style="text-align: center">
                <input class="btn btn-primary" type="submit" value="提交" />
                <input class="btn btn-default" type="reset" value="重置" />
                <input class="btn btn-default" type="button" value="返回"/>
             </div>
        </form>
        </div>
    </body>
</html>

 

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package com.example.web.servlet;
 
import com.example.domain.User;
import com.example.service.UserService;
import com.example.service.impl.UserServiceImpl;
 
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;
 
@WebServlet("/userListServlet")
public class UserListServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.调用UserService完成查询
        UserService service = new UserServiceImpl();
        List<User> users = service.findAll();
        //2.将list存入request域
        request.setAttribute("users",users);
        //3.转发到list.jsp
        request.getRequestDispatcher("/list.jsp").forward(request,response);
    }
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    this.doPost(request,response);
    }
}

用户修改

list.jsp里加上隐藏域提交ai

 

 

 

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void updateUser(User user);//修改
==========
//修改
    @Override
    public void updateUser(User user) {
        dao.update(user);
    }
==========
    void update(User user);//修改
==========
@Override
    public void update(User user) {
        String sql = "update user set name = ?,gender = ? ,age = ? , address = ? , qq = ?, email = ? where id = ?";
        template.update(sql, user.getName(), user.getGender(), user.getAge(), user.getAddress(), user.getQq(), user.getEmail(), user.getId());
    }==========
package com.example.web.servlet;
 
import com.example.domain.User;
import com.example.service.UserService;
import com.example.service.impl.UserServiceImpl;
import org.apache.commons.beanutils.BeanUtils;
 
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Map;
 
@WebServlet("/updateUserServlet")
public class UpdateUserServlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //1.设置编码
        request.setCharacterEncoding("utf-8");
        //2.获取map
        Map<String, String[]> map = request.getParameterMap();
        //3.封装对象
        User user = new User();
        try {
            BeanUtils.populate(user,map);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }
 
        //4.调用Service修改
        UserService service = new UserServiceImpl();
        service.updateUser(user);
 
        //5.跳转到查询所有Servlet
        response.sendRedirect(request.getContextPath()+"/userListServlet");
    }
 
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }
}

 list.jsp↓

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<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<!DOCTYPE html>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
    <head>
        <!-- 指定字符集 -->
        <meta charset="utf-8">
        <meta http-equiv="X-UA-Compatible" content="IE=edge">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <title>修改用户</title>
 
        <link href="css/bootstrap.min.css" rel="stylesheet">
        <script src="js/jquery-2.1.0.min.js"></script>
        <script src="js/bootstrap.min.js"></script>
         
    </head>
    <body>
        <div class="container" style="width: 400px;">
        <h3 style="text-align: center;">修改联系人</h3>
        <form action="${pageContext.request.contextPath}/updateUserServlet" method="post">
            <!--  隐藏域 提交id-->
            <input type="hidden" name="id" value="${user.id}">
 
          <div class="form-group">
            <label for="name">姓名：</label>
            <input type="text" class="form-control" id="name" name="name"  value="${user.name}" readonly="readonly" placeholder="请输入姓名" />
          </div>
 
          <div class="form-group">
            <label>性别：</label>
              <c:if test="${user.gender == '男'}">
                  <input type="radio" name="gender" value="男" checked />男
                  <input type="radio" name="gender" value="女"  />女
              </c:if>
 
              <c:if test="${user.gender == '女'}">
                  <input type="radio" name="gender" value="男"  />男
                  <input type="radio" name="gender" value="女" checked  />女
              </c:if>
 
 
          </div>
 
          <div class="form-group">
            <label for="age">年龄：</label>
            <input type="text" class="form-control" value="${user.age}" id="age"  name="age" placeholder="请输入年龄" />
          </div>
 
          <div class="form-group">
            <label for="address">籍贯：</label>
             <select name="address" id="address" class="form-control" >
                 <c:if test="${user.address == '陕西'}">
                    <option value="陕西" selected>陕西</option>
                    <option value="北京">北京</option>
                    <option value="上海">上海</option>
                 </c:if>
 
                 <c:if test="${user.address == '北京'}">
                     <option value="陕西" >陕西</option>
                     <option value="北京" selected>北京</option>
                     <option value="上海">上海</option>
                 </c:if>
 
                 <c:if test="${user.address == '上海'}">
                     <option value="陕西" >陕西</option>
                     <option value="北京">北京</option>
                     <option value="上海" selected>上海</option>
                 </c:if>
            </select>
          </div>
 
          <div class="form-group">
            <label for="qq">QQ：</label>
            <input type="text" id="qq" class="form-control" value="${user.qq}" name="qq" placeholder="请输入QQ号码"/>
          </div>
 
          <div class="form-group">
            <label for="email">Email：</label>
            <input type="text" id="email" class="form-control" value="${user.email}" name="email" placeholder="请输入邮箱地址"/>
          </div>
 
             <div class="form-group" style="text-align: center">
                <input class="btn btn-primary" type="submit" value="提交" />
                <input class="btn btn-default" type="reset" value="重置" />
                <input class="btn btn-default" type="button" value="返回"/>
             </div>
        </form>
        </div>
    </body>
</html>

 

 

posted @   ja不会va  阅读(19)  评论(0)  编辑  收藏  举报
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