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[Java教程]Web前端开发:SQL Jsp小项目(二)


  沿着昨天整理好的页面,今天实现list页面中的修改,

  User update框架

需要的效果图:

先看用户查询界面,

修改id为4的那个用户:

  

  修改后返回用户查看界面。

  1 .先是从list界面开始,在昨天的代码基础上,实现修改功能:

   2.携带被修改用户的Id属性,跳转到UserModifyServlet

package com.jaovo.jcms.user;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.jaovo.jcms.service.UserService;public class UserModifyServlet extends HttpServlet{  private static final long serialVersionUID = 1L;  @Override  protected void service(HttpServletRequest request, HttpServletResponse response)      throws ServletException, IOException {    //获得客户端传过来的数据    String id = request.getParameter("id");    System.out.println(id);        UserService userService = new UserService();    User user = userService.getUserById(Integer.parseInt(id));        request.setAttribute("user", user);        this.getServletContext().getRequestDispatcher("/admin/user_update.jsp").forward(request, response);      }    }

 

  3.UserModifyServlet携带的Id,获取该用户的属性,并跳转到update界面,依然是在Eclips工具中写一个user_update.jsp:

<%@page import="com.jaovo.jcms.util.PageList"%><%@ page language="java" contentType="text/html; charset=utf-8"  pageEncoding="utf-8"%><%@ page import="com.jaovo.jcms.user.*"%><%@ page import="java.util.*"%><%@ page import="com.jaovo.jcms.util.*"%><%  String path = request.getContextPath();  String basePath = request.getScheme() + "://"      + request.getServerName() + ":" + request.getServerPort()      + path + "/";%><html>  <head>    <base href="<%=basePath%>" />    <title>用户修改</title>    <link rel="stylesheet" type="text/css" title="xp"      href="css/skins/xp/validator/component.css" />    <link rel="stylesheet" type="text/css" title="xp"      href="css/skins/xp/navbar/nav.css" />    <link rel="stylesheet" type="text/css" title="xp"      href="css/skins/xp/table/skin.css" />    <link rel="stylesheet" type="text/css" title="xp"      href="css/skins/xp/time/skin.css" />    <script type="text/javascript" src="jscript/time/calendar.js"></script>    <script type="text/javascript" src="jscript/time/calendar-zh.js"></script>    <script type="text/javascript" src="jscript/time/calendar-setup.js"></script>    <script type="text/javascript" src="jscript/common.js"></script>    <script type="text/javascript"      src="jscript/validator/form_validator.js" /></script>    <script type="text/javascript">    var validatedInfo    = "correct";    var requireErrorInfo  = "required<br/>";    var msgInfo  = new Array();        msgInfo[0]        = new Array('name required','name error');    var name        = new formEle(true,"no",null,"name_info",msgInfo[0]);            msgInfo[0]        = new Array('pwd required','pwd error');    var password      = new formEle(true,"no",null,"password_info",msgInfo[0]);            msgInfo[0]        = new Array('description required','description error');    var description      = new formEle(true,"no",null,"description_info",msgInfo[0]);        msgInfo[0]        = new Array('role required','role error');    var role        = new formEle(true,"no",null,"role_info",msgInfo[0]);       msgInfo[0]        = new Array('valid required','please input number like 1 ,2 ,3');    var valid        = new formEle(true,"num",null,"valid_info",msgInfo[0]);                msgInfo[0]        = new Array('email required','email error');    var email        = new formEle(true,"no",null,"email_info",msgInfo[0]);          function submitForm(obj) {            var ret = validateAll(obj);            if (ret == true) {             if (document.forms[0].submit) {              document.forms[0].submit.disabled = true;            }          }          return ret;        }</script>    <style type="text/css">body,table,td,select,textarea,input {  font-family: Verdana, Arial, Helvetica, sans-serif;  font-size: 11px;}</style>  </head>  <%  User user = (User)request.getAttribute("user");  %>  <body>    <div id="main">      <form name="backuserform" method="post"        action="admin/UserModifiedServlet"         onSubmit=''>        <table class="standard">          <thead>            <tr>              <th align="center" colspan="2">              用户修改              </th>            </tr>          </thead>          <tbody>            <tr>              <td align="left">                用户名              </td>              <td align="left">                <input name="name" type="text" TABINDEX="1" id="name" value="<%=user.getName() %>"/>                <input name="id" type="hidden" TABINDEX="1" value="<%=user.getId() %>" />                <div class="Info">                  <div id="name_info"></div>                </div>              </td>            </tr>            <tr>              <td align="left">                用户密码              </td>              <td align="left">                <input name="password" type="password" value="" TABINDEX="2"                  id="password" value="<%=user.getPassword()%>"/>                <div class="Info">                  <div id="password_info"></div>                </div>              </td>            </tr>            <tr>              <td align="left">                角色              </td>              <td align="left">                <select name="role" TABINDEX="3" id="role">                  <option value="1">                    超级管理员                  </option>                </select>                <div class="Info">                  <div id="role_info"></div>                </div>              </td>            </tr>            <tr>              <td align="left">                是否有效              </td>              <td align="left">                     <select name="valid" TABINDEX="4" id="valid">                <option value="1">有</option>                <option value="0">无</option>              </select>                <div class="Info">                  <div id="valid_info"></div>                </div>              </td>            </tr>            <tr>              <td align="left">                EMAIL              </td>              <td align="left">                <input name="email" type="text" value="<%=user.getEmail() %> " TABINDEX="5" id="email" />                <div class="Info">                  <div id="email_info"></div>                </div>              </td>            </tr>            <tr>            <td align="left">Phone</td>            <td align="left"><input name="phone" type="text" value="<%=user.getPhone() %>"              TABINDEX="5" id="phone" />              <div class="Info">                <div id="phone_info"></div>              </div></td>          </tr>            <tr>              <td colspan="2" align="center">                <input class="submitButton" type="submit" TABINDEX="6"                  name="submit" value="修&nbsp;改">                <input type="button" name="返回" class="submitButton" value="返回"                  onclick="history.back();">              </td>            </tr>          </tbody>          <tfoot>            <tr>              <td colspan="2" style="text-align: left"></td>            </tr>          </tfoot>        </table>      </form>    </div>  </body></html>

  4.需要一个ModifiedServlet.java

package com.jaovo.jcms.user;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.jaovo.jcms.service.UserService;public class UserModifiedServlet extends HttpServlet{  private static final long serialVersionUID = 1L;//这里以前没有     @Override    protected void service(HttpServletRequest request, HttpServletResponse response)        throws ServletException, IOException {       request.setCharacterEncoding("utf-8");       response.setCharacterEncoding("utf-8");             String id = request.getParameter("id");       String name = request.getParameter("name");        String password = request.getParameter("password");        String valid = request.getParameter("valid");        String email = request.getParameter("email");        String phone = request.getParameter("phone");                User user = new User();                user.setId(Integer.parseInt(id));        user.setName(name);        user.setPassword(password);        user.setValid(Integer.parseInt(valid));        user.setEmail(email);        user.setPhone(phone);                UserService userService = new UserService();        userService.updateUser(user);                this.getServletContext().getRequestDispatcher("/admin/UserListServlet").forward(request, response);        //从一个Servlet到另外一个Servlet是同一个request对象    }  }

  5.跳转到UserListServlet,同时携带ModifiedServletrequestresponse对象,最后在list界面中显示出修改后的用户信息。

以上就是这次优化的所有代码,后面还会持续优化,望大家斧正。

2015-10-09   09:06:38

  • 生命不息,代码不止!