Struts2 INPUT的代码演示

login.jsp

引入标签<%@ taglib prefix="s" uri="/struts-tags" %>
<s:fielderror name="username"></s:fielderror>

<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<!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>
<form action="LoginAction.action" method="post">
用户名：<input type="text" name="username"><s:fielderror name="username"></s:fielderror>
<input type="submit" value="提交" />
</form>
</body>
</html>

LoginAction.java

this.addFieldError("username", "用户名为空");

package com.action;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.po.User;

public class LoginAction extends ActionSupport implements ModelDriven<User>{
    
    private User user = new User();
    
    @Override
    public User getModel() {
        return user;
    }
    
    public String login(){
        if(user.getUsername().equals("")||user.getUsername().equals(null)){
            this.addFieldError("username", "用户名为空");
            return INPUT;
        }
        System.out.println("------username="+user.getUsername());
        return SUCCESS;
    }
}

或者LoginAction.java

package com.action;

import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
import com.po.User;

public class LoginAction extends ActionSupport implements ModelDriven<User>{
    
    private User user = new User();
    
    @Override
    public User getModel() {
        return user;
    }
    
    public String login(){
        System.out.println("------username="+user.getUsername());
        return SUCCESS;
    }

    @Override
    public void validate() {
        if(user.getUsername().equals("")||user.getUsername().equals(null)){
            this.addFieldError("username", "用户名为空");
        }
    }
}

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>
    <package name="default" namespace="/" extends="struts-default">
        <action name="LoginAction" method="login" class="com.action.LoginAction">
            <result>/success.jsp</result>
            <result name="input">/login.jsp</result>
        </action>
    </package>
</struts>

 

posted @ 2016-07-27 09:59  smilelily126  阅读(389)  评论(0)  编辑  收藏  举报