Struts2+JSON+JQuery实现简单验证

刚学的东东，搞了很久的一个小成果，在此与大家分享。。。

 

1.创建struts_JSON项目，加入struts2所需的六个包，分别为：commons-fileupload-1.2.1.jar， commons-io-1.3.2.jar， freemarker-2.3.15.jar ， ognl-2.7.3.jar，  struts2-core-2.1.8.1.jar ， xwork-core-2.1.6.jar 。

 

2.创建web.xml 和 struts.xml 代码分别如下：

   web.xml

   

"1.0" encoding="UTF-8"?>
"2.5"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    Struts JSON


        struts2
        class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilterclass>



        struts2
        /*



      index.jsp

	
    Struts JSON

    
        struts2
        org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
    

    
        struts2
        /*
    

	
	  index.jsp
	

 

 

    struts.xml

   

"1.0" encoding="UTF-8" ?>

    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">




    "struts.enable.DynamicMethodInvocation" value="true" />
    "struts.devMode" value="true" />
    "struts.i18n.encoding" value="UTF-8">

    <package name="json test" namespace="/" extends="json-default">
        <default-action-ref name="login">default-action-ref>
        "login" class="com.action.LoginAction">
            "json">
                "root">tip


    package>

	
    
    
    
    
    
    	
    	
    		
    			tip
    		
    	
    
    

 

 

3.加入JSON 所需的包共七个包,都是可以在struts-2.1.8.1/lib 目录下可以找得到的，他们分别为：json-lib-2.1.jar， struts2-json-plugin-2.1.8.1.jar，（这两个是JSON所必须的包） ezmorph-1.0.3.jar， commons-collections-3.2.jar， commons-beanutils-1.7.0.jar， commons-logging-1.0.4.jar， commons-lang-2.3.jar 。（因为json大量引用了Apache commons的包，所以需要引入commons的四个包。）

 

4.创建model ：User.java

  

package com.model;

public class User {

    private String username="";
    private String password="";

    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;
    }
}

package com.model;

public class User {

	private String username="";
	private String password="";
	
	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;
	}
}

 

 

5.创建action： LoginAction.java:

  

package com.action;

import java.net.URLDecoder;
import java.util.HashMap;
import java.util.Map;

import net.sf.json.JSONObject;

import com.model.User;
import com.opensymphony.xwork2.ActionSupport;

@SuppressWarnings("serial")
public class LoginAction extends ActionSupport {

    User user;
    private String tip="";

    public String execute() throws Exception {
        String username=user.getUsername();
        String password=user.getPassword();
        username=URLDecoder.decode(username, "utf-8");    //中文传参处理
        System.out.println("Username:"+username+" , Password:"+password);  //测试运行进度

        Map map=new HashMap();
        map.put("username", username);
        JSONObject jo=JSONObject.fromObject(map);
        tip=jo.toString();
        System.out.println("Get Tips:"+tip);

        return SUCCESS;
    }

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public String getTip() {
        return tip;
    }
    public void setTip(String tip) {
        this.tip = tip;
    }

}

package com.action;

import java.net.URLDecoder;
import java.util.HashMap;
import java.util.Map;

import net.sf.json.JSONObject;

import com.model.User;
import com.opensymphony.xwork2.ActionSupport;

@SuppressWarnings("serial")
public class LoginAction extends ActionSupport {

	User user;
	private String tip="";
	
	public String execute() throws Exception {
		String username=user.getUsername();
		String password=user.getPassword();
		username=URLDecoder.decode(username, "utf-8");    //中文传参处理
		System.out.println("Username:"+username+" , Password:"+password);  //测试运行进度		
			
		Map map=new HashMap();
		map.put("username", username);
		JSONObject jo=JSONObject.fromObject(map);
		tip=jo.toString();
		System.out.println("Get Tips:"+tip);

		return SUCCESS;
	} 
	
	public User getUser() {
		return user;
	}

	public void setUser(User user) {
		this.user = user;
	}

	public String getTip() {
		return tip;
	}
	public void setTip(String tip) {
		this.tip = tip;
	}
	
}

 

6.创建View login.jsp:

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

"-//W3C//DTD HTML 4.01 Transitional//EN">


    "<%=basePath%>">

    Struts2+jQuery+JSON 登陆验证
    "pragma" content="no-cache">
    "cache-control" content="no-cache">
    "expires" content="0">
    "keywords" content="keyword1,keyword2,keyword3">
    "description" content="This is my page">

    "text/css">
        .decorate{               /*控制文本框样式*/
            border:1px solid #F00;
            background:url(images/text_bg.gif) repeat-x;;
            background-position:bottom;
        }

    "text/javascript" src="js/jquery-1.4.2.min.js">
    "text/javascript">
        $(function(){
            //var username=$("#username"); //抓取对象
            //var password=$("#password");
            $("#validate").click(function(){
                var username=$("#username").val();  //只能使用在jQuery 函数的里面
                var password=$("#password").val();
                if(username==""||password==""){
                    alert("用户名或密码不能为空！");
                }else{
                    var url="login?user.username="+encodeURI(encodeURI(username))+"&user.password="+encodeURI(encodeURI(password));
                    $.getJSON(url,null,function(data){
                         // convert to json object
                        //alert(data);
                        var message=eval("("+data+")");
                        $("#tip").html("欢迎您！"+message.username);
                    });
                }
            });

            $("#username").keyup(function(){
                var username=$("#username").val();
                if(username==""){
                    $("#username").addClass("decorate");
                }else{
                    $("#username").removeClass("decorate");
                }
            });
            $("#password").keyup(function(){
                var password=$("#password").val();
                if(password==""){
                    $("#password").addClass("decorate");
                }else{
                    $("#password").removeClass("decorate");
                }
            });
        });




    "tip" style="color:#F00; font-weight:bold; ">

  

        "width:600px; ">   

            

用户登录

  

            "center">账号："text" name="user.username" id="username" class="decorate" />

  

            "center">密码："password" name="user.password" id="password" class="decorate" />

  

            "center">"submit" id="validate" name="validate" value="确定" />

  

           

     

  

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>



  
    
    
    
	
	
	    
	
	
	
	
	
	
  
  
  
	

		

			
用户登录
			
账号：
			
密码：
			

		
  

  （注：这里引入了jquery-1.4.2.min.js 的JS插件，同时在body中，不可以在加上 form的标签，否则，在“tip”中不能正常显示，而且也返回不了数据疑问中？？？是不是jQuery的作用？？？？？。。。也希望各位多多指教..非常感谢..小弟在此露脸了......）