Java SSE 服務器推送WEB頁面接收數據

//服務器代碼
package com.xy.inuyasha.web.controller;

import javax.servlet.AsyncContext;
import javax.servlet.AsyncEvent;
import javax.servlet.AsyncListener;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Date;

/**
 * Created by Administrator on 2017/3/15.
 */
@WebServlet(urlPatterns = { "/role_echo" }, asyncSupported = true)
public class SseTest extends HttpServlet {

    private static final long serialVersionUID = 1L;
    private final static int DEFAULT_TIME_OUT = 10 * 60 * 1000;

    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        // TODO Auto-generated method stub
        resp.setContentType("text/event-stream");
        resp.setCharacterEncoding("UTF-8");
        req.setAttribute("org.apache.catalina.ASYNC_SUPPORTED", true);//注意這里

        AsyncContext actx = req.startAsync(req, resp);
        actx.setTimeout(DEFAULT_TIME_OUT);
        actx.addListener(new AsyncListener() {
            @Override
            public void onComplete(AsyncEvent arg0) throws IOException {
                // TODO Auto-generated method stub
                System.out.println("[echo]event complete:" + arg0.getSuppliedRequest().getRemoteAddr());
            }

            @Override
            public void onError(AsyncEvent arg0) throws IOException {
                // TODO Auto-generated method stub
                System.out.println("[echo]event has error");
            }

            @Override
            public void onStartAsync(AsyncEvent arg0) throws IOException {
                // TODO Auto-generated method stub
                System.out.println("[echo]event start:" + arg0.getSuppliedRequest().getRemoteAddr());
            }

            @Override
            public void onTimeout(AsyncEvent arg0) throws IOException {
                // TODO Auto-generated method stub
                System.out.println("[echo]event time lost");
            }
        });
        new Thread(new AsyncWebService(actx)).start();
    }
}

class AsyncWebService implements Runnable {
    AsyncContext ctx;

    public AsyncWebService(AsyncContext ctx) {
        this.ctx = ctx;
    }

    public void run() {
        try {
            //等待十秒鍾，以模擬業務方法的執行
            Thread.sleep(10000);
            PrintWriter out = ctx.getResponse().getWriter();
            out.println("data:中文" + new Date() + "\r\n");  //js頁面EventSource接收數據格式：data：數據 + "\r\n"

            out.flush();

            ctx.complete();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

}
//jsp頁面js腳本

if (!!window.EventSource) { //EventSource是SSE的客戶端.此時說明瀏覽器支持EventSource對象
    var source = new EventSource('/role_echo');//發送消息

    s = '';

    source.addEventListener('message', function(e) {

      
          s += e.data + "<br/>";
        $("#msgFromPush").html(s);
    },false);//添加客戶端的監聽

    source.addEventListener('open', function(e) {
        console.log("連接打開");
    }, false);

    source.addEventListener('error',function(e){
        if(e.currentTarget.readyState==EventSource.CLOSED){
            console.log("連接關閉");
        }else{
            console.log(e.currentTarget.readyState);
        }
    });
}else{
    console.log("您的瀏覽器不支持SSE");
}

測試能跑通！！