Java Spring使用EventSource进行服务端推送

Java代码:

    @ResponseBody
    @RequestMapping(value = "/getDate", produces="text/event-stream;charset=UTF-8")
    public void getDate(HttpServletResponse response) throws Exception {
    	log.info("getDate event start");
    	response.setContentType("text/event-stream");
    	response.setCharacterEncoding("UTF-8");
    	response.setStatus(200);
    	while(!response.getWriter().checkError()){
    		response.getWriter().write("data:"+new Date()+"\n\n");
    		response.getWriter().flush();
			Thread.sleep(1000);
    	}
        response.getWriter().close();
    	log.info("getDate event end");
    }

前端代码(jsp):

<%@ page language="java" contentType="text/html;charset=utf-8" pageEncoding="utf-8" %>

<!DOCTYPE html>
<html>
<head>
    <title>日期</title>
</head>
<body>
<div id='date'>
</div>
<script>
		if (typeof(EventSource) !== "undefined") {
			var eventSource = new EventSource("/Output/getDate");
			
	        eventSource.onmessage = function (event) {
	        	document.getElementById("date").innerHTML = event.data;
			   	  
	        }	        
	        eventSource.addEventListener('error', function (event) {
	            console.log("错误:" + event);
	        });
	        eventSource.addEventListener('open', function (event) {
	            console.log("建立连接:" + event);
	        });
	    }
	    else {
	        document.getElementById("date").innerHTML = "抱歉,您的浏览器不支持 server-sent 事件 ...";
	    }   
	
</script>

</body>
</html>

效果图:

Java Spring使用EventSource进行服务端推送

Java Spring使用EventSource进行服务端推送Java Spring使用EventSource进行服务端推送