museum_changshu/zhoushan-system-api/src/main/java/com/fdage/controller/SseController.java

//package com.fdage.controller;
//
//import io.swagger.annotations.ApiOperation;
//import org.springframework.stereotype.Controller;
//import org.springframework.web.bind.annotation.GetMapping;
//import org.springframework.web.bind.annotation.PostMapping;
//import org.springframework.web.bind.annotation.ResponseBody;
//import springfox.documentation.annotations.ApiIgnore;
//
//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.ArrayList;
//import java.util.Date;
//import java.util.List;
//
///**
// * Created by Hb_zzZ on 2019/9/16.
// */
//@ApiIgnore
//@WebServlet(urlPatterns = { "/sendMessage" }, asyncSupported = true)
//@Controller
//public class SseController extends HttpServlet {
//
//    private static final long serialVersionUID = 1L;
//    private final static int DEFAULT_TIME_OUT = 10 * 60 * 1000;
//    public static List<AsyncContext> actxList =new ArrayList<AsyncContext>();
//
//    @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);//注意这里
//
//        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");
//            }
//        });
//
//        actxList.add(actx);
//
////        PrintWriter out = actx.getResponse().getWriter();
////        out.println("data:" + new Date().getTime());  //js页面EventSource接收数据格式：data：数据 + "\r\n"
////        out.flush();
////        new Thread(new AsyncWebService(actx)).start();
//    }
//
//    @GetMapping("send")
//    @ResponseBody
//    public static String send(String msg){
//        //打印当前AsyncContext
//        System.out.println(actxList.size());
//        if(actxList.size()>0){
//            for(int i = 0;i<actxList.size();i++){
//                AsyncContext obj = actxList.get(i);
//                PrintWriter out;
//
//                try {
//                    if (obj.getTimeout()>0){
//                        out = obj.getResponse().getWriter();
//                        out.println(msg);  //js页面EventSource接收数据格式：data：数据 + "\r\n"
//                        out.flush();
//                    }
//                } catch (Exception e) {
//                    // TODO Auto-generated catch block
//                    e.printStackTrace();
//                }
//            }
//        }
//        return "发送消息";
//    }
//
////    class AsyncWebService implements Runnable {
////        AsyncContext ctx;
////
////        public AsyncWebService(AsyncContext ctx) {
////            this.ctx = ctx;
////        }
////
////        public void run() {
////            try {
////                //等待十秒钟，以模拟业务方法的执行
////                Thread.sleep(10000);
////                PrintWriter out = ctx.getResponse().getWriter();
////                out.println("data:中文" + new Date() + "\r\n");  //js页面EventSource接收数据格式：data：数据 + "\r\n"
////
////                out.flush();
////                ctx.complete();
////            } catch (Exception e) {
////                e.printStackTrace();
////            }
////
////        }
////
////    }
//}