DWR3+spring mvc实现

「爱情、让人受尽委屈。」 2023-10-16 22:48 46阅读 0赞

前篇介绍了dwr3的用法，需要的童学请移步到这里：[http://blog.csdn.net/tiantang\_1986/article/details/50427971][http_blog.csdn.net_tiantang_1986_article_details_50427971]

这里在前篇的基础上介绍下dwr3与spring mvc的结合使用

修改一下dwr.xml的配置，把creator="new" 换成creator="spring"，name="class"换成name="beanName"

<?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE dwr PUBLIC
        "-//GetAhead Limited//DTD Direct Web Remoting 1.0//EN"
        "http://www.getahead.ltd.uk/dwr/dwr30.dtd">
    <dwr>
    	<allow>
    		<create creator="spring" javascript="MessagePush">
    			<param name="beanName" value="MessagePush" />
    		</create>
    	</allow>
    </dwr>

在applicationContext.xml配置里面把主类加载一次，添加下面的配置即可

MessagePush做少少的改动，只要是添加一些注解 @Controller、 @RemoteProxy、 @RemoteMethod

package com.mysite.dwr;
    
    import java.util.Collection;
    import java.util.HashMap;
    import java.util.Map;
    
    import org.directwebremoting.Browser;
    import org.directwebremoting.ScriptBuffer;
    import org.directwebremoting.ScriptSession;
    import org.directwebremoting.ScriptSessionFilter;
    import org.directwebremoting.WebContextFactory;
    import org.directwebremoting.annotations.RemoteMethod;
    import org.directwebremoting.annotations.RemoteProxy;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    
    @Controller
    @RemoteProxy
    public class MessagePush {
    	private String userName;
    
    	public void onPageLoad(final String tag) {
    		System.out.println("onPageLoad...");
    		// 获取当前的ScriptSession
    		ScriptSession scriptSession = WebContextFactory.get().getScriptSession();
    		scriptSession.setAttribute("tag", tag);
    		userName=tag;
    		System.out.println("userName="+userName);
    	}
    	
    	@RemoteMethod
    	public void send(String content）{	
    		System.out.println("content="+content);
    		// 过滤器
    		ScriptSessionFilter filter = new ScriptSessionFilter() {
    			public boolean match(ScriptSession scriptSession) {
    				String tag = (String) scriptSession.getAttribute("tag");
    				System.out.println("tag="+tag);
    				return userName.equals(tag);
    			}
    		};
    
    		Runnable run = new Runnable() {
    			private ScriptBuffer script = new ScriptBuffer();
    			public void run() {
    				System.out.println("run....");
    				// 设置要调用的 js及参数
    				script.appendCall("show", content);
    				// 得到所有ScriptSession
    				Collection<ScriptSession> sessions = DWRScriptSessionListener.getScriptSessions();
    				// 遍历每一个ScriptSession
    				for (ScriptSession scriptSession : sessions) {
    					scriptSession.addScript(script);
    				}
    			}
    		};
    		// 执行推送
    		Browser.withAllSessionsFiltered(filter, run); //注意这里调用了有filter功能的方法
    	}
    }

这样即可实现

[http_blog.csdn.net_tiantang_1986_article_details_50427971]: http://blog.csdn.net/tiantang_1986/article/details/50427971