dwr跨域访问

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DWR JSP XML Web Servlet

web.xml配置信息

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="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">
<welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
</welcome-file-list>

<servlet>
<servlet-name>dwr-invoker</servlet-name>
<servlet-class>org.directwebremoting.servlet.DwrServlet</servlet-class>


<init-param>
<param-name>debug</param-name>
<param-value>true</param-value>
</init-param>

<init-param>
<param-name>allowGetForSafariButMakeForgeryEasier</param-name>
<param-value>true</param-value>
</init-param>

<init-param>
<param-name>crossDomainSessionSecurity</param-name>
<param-value>false</param-value>
</init-param>

<init-param>
<param-name>allowScriptTagRemoting</param-name>
<param-value>true</param-value>
</init-param>

</servlet>

<servlet-mapping>
<servlet-name>dwr-invoker</servlet-name>
<url-pattern>/dwr/*</url-pattern>
</servlet-mapping>
</web-app>

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------
dwr.xml的配置信息

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE dwr PUBLIC "-//GetAhead Limited//DTD Direct Web Remoting 2.0//EN" "http://www.getahead.ltd.uk/dwr/dwr20.dtd">
<dwr>
<allow>
<create javascript="TestCross" creator="new">
<param name="class" value="com.topking.test.Operator"/>
</create>
</allow>
</dwr>

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------

java类代码

package com.topking.test;
import org.directwebremoting.WebContext;
import org.directwebremoting.WebContextFactory;
public class Operator {
public String greeting(String src){
WebContext context = WebContextFactory.get();
String ip = context.getHttpServletRequest().getRemoteAddr().toString();//获取客户端IP
return "hello "+src+" Your IP : "+ip;
}
}

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------

页面代码
<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
    <base href="<%=basePath%>">

    <title>My JSP 'TestDWRCross.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

<script type='text/javascript' src='/Ajax_chat/dwr/engine.js'></script>
<script type='text/javascript' src='/Ajax_chat/dwr/util.js'></script>
<script type="text/javascript" src='http://www.myspace.com:8080/DWR_cross/dwr/interface/TestCross.js'></script>

<script type="text/javascript">
function sendMsg(){
DWREngine.setMethod(DWREngine.ScriptTag);
TestCross.greeting(DWRUtil.getValue("userName"),function(data){alert(data);});
}
</script>
</head>

<body>
    Input Your Name:<input type="text" id="userName"/> <input type="button" value="Submit" onclick="sendMsg();"/> <br>
</body>
</html>