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> 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 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 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); 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.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：
