dwr基于struts2和spring2.5的配置详解

第一步：web.xml配置；

<servlet>
		<servlet-name>dwr-invoker</servlet-name>
		<servlet-class>org.directwebremoting.spring.DwrSpringServlet</servlet-class>
		<init-param>
			<param-name>debug</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>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>dwr-invoker</servlet-name>
		<url-pattern>/dwr/*</url-pattern>
	</servlet-mapping>

因为SSH框架集成了struts2，此处必须配置不让struts2拦截掉/dwr/*的action，需要作第二步配置。
第二步：struts.xml配置

<constant name="struts.action.excludePattern" value="/dwr/.*,/dwr/test/.*"></constant>

用以使struts不拦截/dwr/.*的请求
第三步：spring的applicationContext.xml配置
1）、增加命名空间

	xmlns:dwr="http://www.directwebremoting.org/schema/spring-dwr"
	xmlns:dwra="http://www.directwebremoting.org/schema/spring-dwr-annotations"

2）、

http://www.directwebremoting.org/schema/spring-dwr
    http://www.directwebremoting.org/schema/spring-dwr-3.0.xsd
    http://www.directwebremoting.org/schema/spring-dwr-annotations    
  	http://www.directwebremoting.org/schema/spring-dwr-annotations.xsd 

3）、

<context:annotation-config/>
	<context:component-scan base-package="com.gd.service.impl" />
	<dwr:configuration />
	 
	<dwr:annotation-scan base-package="com.gd.service.impl" scanDataTransferObject="true" scanRemoteProxy="true" />

第四步：接口编写加注解：

@RemoteProxy(creator = SpringCreator.class, name = "DWRService")
public class TmEduExaminationInfoManagerImpl implements
		ITmEduExaminationInfoManager 

@RemoteMethod
	public String queryInfo(String str){
		return "hello " + str;
	}

注：必须有接口及其实现类
第五步：jsp页面调用
1）、引用js

<script type='text/javascript' src='dwr/engine.js'></script> 
<script type='text/javascript' src='dwr/util.js'></script>
<script type='text/javascript' src='dwr/interface/DWRService.js'></script>

2）、JS调用

DWRService.queryInfo("你是谁",function(flag){  
	    if(flag){  
	    	alert(flag);  
	    }else{  
	     	alert(flag);  
	    }  
   	});