SpringMVC整合websocket實現消息推送及觸發

時間 2019-11-13

標籤 springmvc 整合 websocket 實現消息推送觸發欄目 Spring 简体版

原文原文鏈接

1.建立websocket握手協議的後臺

（1）HandShake的實現類

[java] view plain copyjavascript

/**
*Project Name: price
*File Name: HandShake.java
*Package Name: com.yun.websocket
*Date: 2016年9月3日下午4:44:27
*Copyright (c) 2016,578888218@qq.com All Rights Reserved.
*/
package com.yun.websocket;
import java.util.Map;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.http.server.ServletServerHttpRequest;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.server.HandshakeInterceptor;
/**
*Title: HandShake
*Description:
*@Company: 青島勵圖高科
*@author: 劉雲生
*@version: v1.0
*@since: JDK 1.7.0_80
*@Date: 2016年9月3日下午4:44:27
*/
public class HandShake implements HandshakeInterceptor{
@Override
public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler,
Map<String, Object> attributes) throws Exception {
// TODO Auto-generated method stub
String jspCode = ((ServletServerHttpRequest) request).getServletRequest().getParameter("jspCode");
// 標記用戶
//String userId = (String) session.getAttribute("userId");
if(jspCode!=null){
attributes.put("jspCode", jspCode);
}else{
return false;
}
return true;
}
@Override
public void afterHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler,
Exception exception) {
// TODO Auto-generated method stub
}
}

（2）MyWebSocketConfig的實現類

[java] view plain copyhtml

/**
*Project Name: price
*File Name: MyWebSocketConfig.java
*Package Name: com.yun.websocket
*Date: 2016年9月3日下午4:52:29
*Copyright (c) 2016,578888218@qq.com All Rights Reserved.
*/
package com.yun.websocket;
import javax.annotation.Resource;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;
/**
*Title: MyWebSocketConfig
*Description:
*@Company: 青島勵圖高科
*@author: 劉雲生
*@version: v1.0
*@since: JDK 1.7.0_80
*@Date: 2016年9月3日下午4:52:29
*/
@Component
@EnableWebMvc
@EnableWebSocket
public class MyWebSocketConfig extends WebMvcConfigurerAdapter implements WebSocketConfigurer{
@Resource
MyWebSocketHandler handler;
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
// TODO Auto-generated method stub
registry.addHandler(handler, "/wsMy").addInterceptors(new HandShake());
registry.addHandler(handler, "/wsMy/sockjs").addInterceptors(new HandShake()).withSockJS();
}
}

（3）MyWebSocketHandler的實現類

[java] view plain copyjava

/**
*Project Name: price
*File Name: MyWebSocketHandler.java
*Package Name: com.yun.websocket
*Date: 2016年9月3日下午4:55:12
*Copyright (c) 2016,578888218@qq.com All Rights Reserved.
*/
package com.yun.websocket;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import org.springframework.stereotype.Component;
import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketHandler;
import org.springframework.web.socket.WebSocketMessage;
import org.springframework.web.socket.WebSocketSession;
import com.google.gson.GsonBuilder;
/**
*Title: MyWebSocketHandler
*Description:
*@Company: 青島勵圖高科
*@author: 劉雲生
*@version: v1.0
*@since: JDK 1.7.0_80
*@Date: 2016年9月3日下午4:55:12
*/
@Component
public class MyWebSocketHandler implements WebSocketHandler{
public static final Map<String, WebSocketSession> userSocketSessionMap;
static {
userSocketSessionMap = new HashMap<String, WebSocketSession>();
}
@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
// TODO Auto-generated method stub
String jspCode = (String) session.getHandshakeAttributes().get("jspCode");
if (userSocketSessionMap.get(jspCode) == null) {
userSocketSessionMap.put(jspCode, session);
}
for(int i=0;i<10;i++){
//broadcast(new TextMessage(new GsonBuilder().create().toJson("\"number\":\""+i+"\"")));
session.sendMessage(new TextMessage(new GsonBuilder().create().toJson("\"number\":\""+i+"\"")));
}
}
@Override
public void handleMessage(WebSocketSession session, WebSocketMessage<?> message) throws Exception {
// TODO Auto-generated method stub
//Message msg=new Gson().fromJson(message.getPayload().toString(),Message.class);
//msg.setDate(new Date());
// sendMessageToUser(msg.getTo(), new TextMessage(new GsonBuilder().setDateFormat("yyyy-MM-dd HH:mm:ss").create().toJson(msg)));
session.sendMessage(message);
}
@Override
public void handleTransportError(WebSocketSession session, Throwable exception) throws Exception {
// TODO Auto-generated method stub
if (session.isOpen()) {
session.close();
}
Iterator<Entry<String, WebSocketSession>> it = userSocketSessionMap
.entrySet().iterator();
// 移除Socket會話
while (it.hasNext()) {
Entry<String, WebSocketSession> entry = it.next();
if (entry.getValue().getId().equals(session.getId())) {
userSocketSessionMap.remove(entry.getKey());
System.out.println("Socket會話已經移除:用戶ID" + entry.getKey());
break;
}
}
}
@Override
public void afterConnectionClosed(WebSocketSession session, CloseStatus closeStatus) throws Exception {
// TODO Auto-generated method stub
System.out.println("Websocket:" + session.getId() + "已經關閉");
Iterator<Entry<String, WebSocketSession>> it = userSocketSessionMap
.entrySet().iterator();
// 移除Socket會話
while (it.hasNext()) {
Entry<String, WebSocketSession> entry = it.next();
if (entry.getValue().getId().equals(session.getId())) {
userSocketSessionMap.remove(entry.getKey());
System.out.println("Socket會話已經移除:用戶ID" + entry.getKey());
break;
}
}
}
@Override
public boolean supportsPartialMessages() {
// TODO Auto-generated method stub
return false;
}
/**
* 羣發
* @Title: broadcast
* @Description: TODO
* @param: @param message
* @param: @throws IOException
* @return: void
* @author: 劉雲生
* @Date: 2016年9月10日下午4:23:30
* @throws
*/
public void broadcast(final TextMessage message) throws IOException {
Iterator<Entry<String, WebSocketSession>> it = userSocketSessionMap
.entrySet().iterator();
// 多線程羣發
while (it.hasNext()) {
final Entry<String, WebSocketSession> entry = it.next();
if (entry.getValue().isOpen()) {
new Thread(new Runnable() {
public void run() {
try {
if (entry.getValue().isOpen()) {
entry.getValue().sendMessage(message);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}
}
}
/**
* 給全部在線用戶的實時工程檢測頁面發送消息
*
* @param message
* @throws IOException
*/
public void sendMessageToJsp(final TextMessage message,String type) throws IOException {
Iterator<Entry<String, WebSocketSession>> it = userSocketSessionMap
.entrySet().iterator();
// 多線程羣發
while (it.hasNext()) {
final Entry<String, WebSocketSession> entry = it.next();
if (entry.getValue().isOpen() && entry.getKey().contains(type)) {
new Thread(new Runnable() {
public void run() {
try {
if (entry.getValue().isOpen()) {
entry.getValue().sendMessage(message);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}
}
}
}

2.建立websocket握手處理的前臺

[javascript] view plain copyweb

<script>
var path = '<%=basePath%>';
var userId = 'lys';
if(userId==-1){
window.location.href="<%=basePath2%>";
}
var jspCode = userId+"_AAA";
var websocket;
if ('WebSocket' in window) {
websocket = new WebSocket("ws://" + path + "wsMy?jspCode=" + jspCode);
} else if ('MozWebSocket' in window) {
websocket = new MozWebSocket("ws://" + path + "wsMy?jspCode=" + jspCode);
} else {
websocket = new SockJS("http://" + path + "wsMy/sockjs?jspCode=" + jspCode);
}
websocket.onopen = function(event) {
console.log("WebSocket:已鏈接");
console.log(event);
};
websocket.onmessage = function(event) {
var data = JSON.parse(event.data);
console.log("WebSocket:收到一條消息-norm", data);
alert("WebSocket:收到一條消息");
};
websocket.onerror = function(event) {
console.log("WebSocket:發生錯誤 ");
console.log(event);
};
websocket.onclose = function(event) {
console.log("WebSocket:已關閉");
console.log(event);
}
</script>

3.經過Controller調用進行websocket的後臺推送

[java] view plain copyspring

/**
*Project Name: price
*File Name: GarlicPriceController.java
*Package Name: com.yun.price.garlic.controller
*Date: 2016年6月23日下午3:23:46
*Copyright (c) 2016,578888218@qq.com All Rights Reserved.
*/
package com.yun.price.garlic.controller;
import java.io.IOException;
import java.util.Date;
import java.util.List;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.socket.TextMessage;
import com.google.gson.GsonBuilder;
import com.yun.common.entity.DataGrid;
import com.yun.price.garlic.dao.entity.GarlicPrice;
import com.yun.price.garlic.model.GarlicPriceModel;
import com.yun.price.garlic.service.GarlicPriceService;
import com.yun.websocket.MyWebSocketHandler;
/**
* Title: GarlicPriceController
* Description:
*
* @Company: 青島勵圖高科
* @author: 劉雲生
* @version: v1.0
* @since: JDK 1.7.0_80
* @Date: 2016年6月23日下午3:23:46
*/
@Controller
public class GarlicPriceController {
@Resource
MyWebSocketHandler myWebSocketHandler;
@RequestMapping(value = "GarlicPriceController/testWebSocket", method ={RequestMethod.POST,RequestMethod.GET}, produces = "application/json; charset=utf-8")
@ResponseBody
public String testWebSocket() throws IOException{
myWebSocketHandler.sendMessageToJsp(new TextMessage(new GsonBuilder().create().toJson("\"number\":\""+"GarlicPriceController/testWebSocket"+"\"")), "AAA");
return "1";
}
}