javaweb开发中异步ajax请求之DWR框架详解（通过直接访问java类实现异步请求处理）

该框架只需一个jar包 csdn有 下载：dwr(免费)

web.xml

[java]

org.directwebremoting.servlet.DwrListener

dwr-invoker

org.directwebremoting.servlet.DwrServlet

fileUploadMaxBytes

25000000000000

debug

true

accessLogLevel

runtimeexception

activeReverseAjaxEnabled

true

initApplicationScopeCreatorsAtStartup

true

jsonRpcEnabled

true

jsonpEnabled

true

preferDataUrlSchema

false

1

dwr-invoker

/dwr/*

dwr.xml（与web.xml在同一目录）

[java]

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

现在看下上面mytest.java文件的代码(以我项目中的代码为例)

[java]

package org.ITschool.dwr.utilcontroller;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.InputStream;

import java.io.InputStreamReader;

import org.directwebremoting.WebContext;

import org.directwebremoting.WebContextFactory;

import net.sf.json.JSON;

import net.sf.json.JSONObject;

public class mytest {

public JSON getInfo(String info1){

JSONObject json=new JSONObject();

json.put("name", "XXXX");

json.put("name1", info1);

return json;

}}

最后看下前端调用了(引入必要的js)

<script type='text/java script' src='dwr/engine.js'>

<script type='text/java script' src='dwr/util.js'>

<script type='text/java script' src='dwr/interface/mytest.js'>