Struts+Spring+Ajax整合方法学习...

Spring2.5
Struts1.3
JQuery1.3.2
1. 业务层服务

package com.chencytttl.service;

/**
 * 用户管理接口.
 * User: 陈瑞军
 * Date: 2009-8-12
 * Time: 17:50:41
 */
public interface UserManage {
    /**
     * 判断用户是否存在。
     * @param userName 用户名
     * @return 用户是否存在
     */
    public abstract boolean userExists(String userName);
}

import com.chencytttl.service.UserManage;

import java.util.List;
import java.util.ArrayList;

import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;

/**
 * 用户管理服务.
 * User: 陈瑞军
 * Date: 2009-8-12
 * Time: 17:50:59
 */
@Service("userMessageBean")
public class UserMessageBean implements UserManage {
    /* 用来存放用户名 */
    private List<String> userNames = new ArrayList<String>();

    @PostConstruct
    public void initUserList() {
        userNames.add("chencytttl");
        userNames.add("zhangsan");
    }

    public boolean userExists(String userName) {
        if (userNames.contains(userName)) {
            return true;
        }
        return false;
    }
}

2. Action类

package com.chencytttl.servlet;

import com.chencytttl.service.UserManage;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
import javax.annotation.Resource;

import org.springframework.stereotype.Controller;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForm;

/**
 * 校验用户是否存在Struts Action.
 * User: 陈瑞军
 * Date: 2009-8-12
 * Time: 17:57:37
 */
@Controller("/validUserExists")
public class ValidUserExistsAction extends Action {
    @Resource(name = "userMessageBean")
    private UserManage userManage;

    @Override
    public ActionForward execute(ActionMapping actionMapping, ActionForm actionForm, HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception {
        ValidFrom vf = (ValidFrom) actionForm;
        boolean isExists = userManage.userExists(vf.getUserName());
        PrintWriter out = httpServletResponse.getWriter();
        if (!isExists) {
            out.append("User not Exists!");
        } else {
            out.println("Hello" + vf.getUserName());
        }
        return null;
    }
}

3.Spring配置文件，Struts配置文件以及Web.xml文件，以及Spring和Struts整合的关键
Spring配置文件(applicationContext.xml)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd">
       <context:component-scan base-package="com.chencytttl"></context:component-scan>
</beans>

Struts配置文件(struts-config.xml)

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

<!DOCTYPE struts-config PUBLIC
        "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
        "http://struts.apache.org/dtds/struts-config_1_3.dtd">

<struts-config>
    <form-beans>
        <form-bean name="validForm" type="com.chencytttl.servlet.ValidFrom"></form-bean>
    </form-beans>
    <global-exceptions></global-exceptions>
    <global-forwards></global-forwards>
    <action-mappings>
        <action path="/validUserExists" name="validForm" scope="request" [color=red]type="org.springframework.web.struts.DelegatingActionProxy"[/color] validate="true" input="/index.jsp">
        </action>
    </action-mappings>

</struts-config>

其中，红色部分是Spring和Struts整合的关键（当然只是整合的一种方式）
web配置文件(web.xml)

<?xml version="1.0" encoding="UTF-8"?>
<web-app 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"
           version="2.5">
    <!-- 加载spring的BeanFactory -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!-- 加载Struts的调度核心 -->
    <servlet>
        <servlet-name>action</servlet-name>
        <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
        <init-param>
            <param-name>config</param-name>
            <param-value>/WEB-INF/struts-config.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>action</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
</web-app>

4.Jsp页面(index.jsp)

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
      <title>Ajax学习</title>
      <script type="text/javascript" src="jquery-1.3.2.js"></script>
      <script type="text/javascript" src="ajaxstudy.js"></script>
  </head>
  <body>
    <h4>请输入你的姓名:</h4>
    <input type="text" id="userNameText" /><span id="result"></span><br/>
    <input type="button" value="提交" onclick="valid()">
  </body>
</html>

5. JS脚本(ajaxstudy.js)

function valid() {
    $.ajax({
        url:'validUserExists.do',
        type:'get',
        data:'userName=' + $("#userNameText").val(),
        error: function() {
            alert("error");
        },
        success: function(data) {
            $("#result").text(data).css("color", "blue");
        }
    });
}