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登陆判断

struts2:extends ActionSupport

@Override	public String execute() throws Exception {		User user = userService.getUser(loginName);		if (user==null) {			addFieldError("loginName",getText("invalid.loginname"));   用户名错误			return INPUT;		}		else if (!user.getPassword().equals(password)) {			addFieldError("password", getText("invalid.password"));     密码错误			return INPUT;		}		else {			sessionMap.put("user",user);			return SUCCESS;		}

 SpringMVC:啥都没继承

      把对象写在方法的参数列表中,spring会自动创建这个对象

//建议不用实体类接受请求,建议单独定义一个表单类	@RequestMapping(value="http://www.mamicode.com/login",method=RequestMethod.POST)	public String doLogin2(			@ModelAttribute("form")LoginForm loginForm,//这样转发回表单页面的时候会自动回填数据			BindingResult result			){		if(!loginForm.getLoginName().equals("admin")){			result.rejectValue("loginName","form", "用户名输入错误");  //reject是驳回的意思		}else if (!loginForm.getPassword().equals("123456")) {			result.rejectValue("password","form", "密码输入错误");		}		//如果添加了错误信息,则转发回登陆表单页面		if(result.hasErrors()){			return "login";		}						System.out.println("登录名:"+loginForm.getLoginName());		System.out.println("密码:"+loginForm.getPassword());		return "hello";	}

 

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%@ taglib uri="http://www.springframework.org/tags/form" prefix="form"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>SpringMVC</title><link href="http://www.mamicode.com/style/style.css" rel="stylesheet" type="text/css"/></head><body>										<!-- 对象要和表单绑定,把对象传递过来 -->	 <form:form action="" method="post" commandName="form">	 <tr>	 	<td>登录名:</td>	 	<td>	 		<form:input path="loginName" />	 	</td>	 </tr>	 <tr>	 	<td></td>	 	<td>	 		<form:errors path="loginName"/>	 	</td>	 </tr>	 <tr>	 	<td>密码:</td>	 	<td>	 		<form:password path="password" />	 	</td>	 </tr>	  <tr>	 	<td></td>	 	<td>	 		<form:errors path="password"/>	 	</td>	 </tr>	 <tr>	 	<td></td>	 	<td>	 		<input type="submit" value="http://www.mamicode.com/登陆"/>	 	</td>	 </tr>	 	 </form:form></body></html>

 

登陆判断