标签：
一：登录页面：login.jsp
1 <%@ page language="java" contentType="text/html; charset=utf-8"
2 pageEncoding="utf-8"%>
3 <%@ taglib prefix="s" uri="/struts-tags"%>
4 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
5 <html>
6 <head>
7 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
8 <title>登录页面</title>
9 </head>
10 <body>
11 <s:fielderror escape="false"></s:fielderror>
12 <font color="red">${requestScope.error}</font>
13 <form action="loginReg" method="post" >
14 用户名：<input type="text" name="username"><br>
15 密码:<input type="text" name="password"><br>
用户类型：
<select name="userType">
<option value="管理员">管理员</option>
<option value="普通用户">普通用户</option>
</select>
16 <input type="submit" value="登录">
17 </form>
18 </body>
19 </html>
二：跳转到action nuc.sw.action-->LoginRegAction
1 package nuc.sw.action;
2
3 import com.opensymphony.xwork2.ActionContext;
4 import com.opensymphony.xwork2.ActionSupport;
5
6 public class LoginRegAction extends ActionSupport{
7 private String username;
8 private String password;
9 private String userType;
10 public String getUsername() {
11 return username;
12 }
13
14 public void setUsername(String username) {
15 this.username = username;
16 }
17
18 public String getPassword() {
19 return password;
20 }
21
22 public void setPassword(String password) {
23 this.password = password;
24 }
25 public String getUserType() {
return userType;
}
public void setUserType(String userType) {
this.userType = userType;
}
26 @Override
27 public String execute() throws Exception {
28 // public String LoginMethod() throws Exception {
29 // TODO Auto-generated method stub
30 //登录逻辑
31 if(username.equals("zd")&&password.equals("123")){
32 ActionContext.getContext().getSession().put("user", username);
33 ActionContext.getContext().getSession().put("pass", password);
ActionContext.getContext().getSession().put("type", userType);
34 return SUCCESS;
35 }
36 else{
37
38 ActionContext.getContext().put("error", "用户名或者密码错误");
39 return ERROR;
40 }
41
42 }
43 @Override
44 public void validate() {
45 // TODO Auto-generated method stub
46 if(username==null||username.trim().equals(""))
47 this.addFieldError("usernameError", "<font color=‘red‘>用户名不能为空</font>");
48 if(password==null||password.trim().equals(""))
49 this.addFieldError("passwordError", "<font color=‘red‘>密码不能为空</font>");
50
51 }
52 }
三：修改配置文件struts.xml
1 <?xml version="1.0" encoding="UTF-8" ?> 2 <!DOCTYPE struts PUBLIC 3 "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN" 4 "http://struts.apache.org/dtds/struts-2.3.dtd"> 5 6 <struts> 7 <constant name="struts.devMode" value="true" /> 8 <package name="default" namespace="/" extends="struts-default"> 9 <action name="loginReg" class="nuc.sw.action.LoginRegAction"> 10 <result name="success">/welcome.jsp</result> 11 <result name="error">/login.jsp</result> 12 <result name="input">/login.jsp</result> 13 </action> 14 </package> 15 <!-- Add packages here --> 16 </struts>
四：登录成功页面 welcome.jsp
1 <%@ page language="java" contentType="text/html; charset=utf-8"
2 pageEncoding="utf-8"%>
3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
4 <html>
5 <head>
6 <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
7 <title>Insert title here</title>
8 </head>
9 <body>
10 欢迎${sessionScope.type}${sessionScope.user}登录;
11 </body>
12 </html>
五：action标签的method属性的取值
1 public String LoginMethod() throws Exception 去@override
1 <action name="loginReg" class="nuc.sw.action.LoginRegAction" method="LoginMethod">
六：使用ActionSupport所提供的方法
1 @Override
2 public void validate() {
3 // TODO Auto-generated method stub
4 if(username==null||username.trim().equals(""))
5 this.addFieldError("usernameError", "用户名不能为空");
6 if(password==null||password.trim().equals(""))
7 this.addFieldError("passwordError", "密码不能为空");
8
9 }
七：修改struts.xml 获取校验的数据
1 <result name="input">/login.jsp</result>
八：修改login.jsp 在登录页面显示错误信息
1 <%@ taglib prefix="s" uri="/struts-tags"%> 2 <s:fielderror escape="false"></s:fielderror>
九：项目结构：
十：运行结果：
正确：
?
错误：
数据校验：
标签：
原文地址：http://www.cnblogs.com/Z-D-/p/5918069.html
