版权声明：多多交流。 https://blog.csdn.net/qq_42776455/article/details/83447113
写在前面
将用户管理这个小项目：https://blog.csdn.net/qq_42776455/article/details/83446340 改写成结合JavaBean的。
ValueBean
com.um.ValueBean
MyEclipse自动生成getter，setter函数。右键source->getter，setter。
package com.um.ValueBean;
public class User {
private String name;
private String tel;
private String sex;
private String password;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getTel() {
return tel;
}
public void setTel(String tel) {
this.tel = tel;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
ToolsBean
com.um.ToolsBean，此处我的类命名有点不太合适。
package com.um.ToolsBean;
import com.um.ValueBean.User;
import java.util.*;
public class UserList {
public static List<User> getUsers() {
List<User> users = new ArrayList();
for(int i=0;i<20;i++)
{
User user = new User();
user.setName("zhang"+i);
user.setTel("133333333"+i);
user.setSex("男");
user.setPassword("123456");
users.add(user);
}
return users;
}
public boolean checkLogin(List<User> users,String username,String password) {
boolean login_flag = false;
for (User u : users) {
if (u.getPassword().equals(password)
&& u.getName().equals(username))
login_flag = true;
}
return login_flag;
}
}
改写doLogin.jsp
仅改写doLogin.jsp，其他页面不变。
<%@page import="java.awt.Checkbox"%>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<%@page import="com.um.ToolsBean.UserList" %>
<%@page import="com.um.ValueBean.*" %>
<%
// 用户创建
List<User> users = UserList.getUsers();
%>
<%
// 登录验证
request.setCharacterEncoding("utf-8");
String username = request.getParameter("username");
String password = request.getParameter("password");
UserList userF = new UserList();
boolean check_login = userF.checkLogin(users, username, password);
if (check_login) {
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'doLogin.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>
<p>
当前用户<b><%=username%></b>已登录
</p>
<table border="1" cellspacing="0">
<tr>
<th>用户名</th>
<th>电话</th>
<th>性别</th>
<th>密码</th>
<th>操作</th>
</tr>
<%
for (User u : users) {
%>
<tr>
<td><%=u.getName()%></td>
<td><%=u.getTel()%></td>
<td><%=u.getSex()%></td>
<td><%=u.getPassword()%></td>
<td><button onclick="delrow(this)">delete</button>
</td>
</tr>
<%
}
%>
</table>
<%
} else {
// 登录失败重定向。
response.sendRedirect("loginFailed.jsp");
}
%>
<script type="text/javascript">
function delrow(_obj) {
_td = _obj.parentNode;
_tr = _td.parentNode;
_table = _tr.parentNode;
_table.removeChild(_tr);
}
</script>
</body>
</html>