struts2于validate要使用

package com.test.action;

import com.opensymphony.xwork2.ActionSupport;

import com.test.model.User;

public class CheckUser extends ActionSupport{

	/**

	 *

	 */

	private static final long serialVersionUID = 1L;

	private User user=new User();

	private String username;

	public String getUsername() {

		return username;

	}

	public void setUsername(String username) {

		this.username = username;

	}

	public String getPassword() {

		return password;

	}

	public void setPassword(String password) {

		this.password = password;

	}

	private String password;

	@Override

	public String execute() throws Exception {

		System.out.println("checkuser");

		// TODO Auto-generated method stub

		return SUCCESS;

	}

	/*注意，validate方法是在execute之前运行*/

	@Override

	public void validate() {

		user.setUsername(this.getUsername());

		user.setPassword(this.getPassword());

		System.out.println(user);

		// TODO Auto-generated method stub

		if(user.getUsername().equals("admin"))

		{

			this.addFieldError("username_error", "权限不够");

		}

		super.validate();

	}

}

struts.xml

<?xml version="1.0" encoding="UTF-8" ?

>

<!DOCTYPE struts PUBLIC

	"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"

	"http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

  <!--   採用注解的方式 -->

  	<constant name="struts.enable.DynamicMethodInvocation" value="true" />

    <constant name="struts.devMode" value="true" /> 

    <package name="default" namespace="" extends="struts-default">

        <!-- struts2捕获action类异常 -->

        <!-- <global-results>

			<result name="error">/error.jsp</result>

		</global-results>

		<global-exception-mappings>

			<exception-mapping result="error" exception="java.lang.Exception"></exception-mapping>

		</global-exception-mappings> -->

    	<action name="link" class="com.test.action.LoginAction">

    	    <result>/result.jsp</result>

    	</action>

    	<action name="linkIOC" class="com.test.action.LoginActionIOC">

    	    <result>/result.jsp</result>

    	</action>

    	<!-- 正确和错误的分别跳转，齐总input是在验证失败后会跳转的页面 -->

    	<action name="data" class="com.test.action.CheckUser">

    	     <result name="success">/result.jsp</result>

    	    <result name="input">/login.jsp</result>

    	</action>

    </package>

    <!-- Add packages here -->

</struts>

html页面

<%@ page language="java" contentType="text/html; charset=UTF-8"

    pageEncoding="UTF-8"%>

<%@ taglib uri="/struts-tags" prefix="s"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

<title>Insert title here</title>

</head>

<body>

<!-- 这个地方是用来显示错误信息 -->

<s:fielderror/>

<form action="data.action" method="post">

<input type="text" name="username"><br>

<input type="password" name="password"><br>

<input type="submit" name="ok"><br>

</form>

</body>

</html>

即当严重不通过后，会返回到该页面，同一时候输出出错信息。

測试结果。当输入admin之后。会发现例如以下的页面

struts2于validate要使用

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struts2于validate要使用

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