基于spring实现websocket实时推送实例

基于spring框架来写的，websocket实时推送例子，具体内容如下

专业领域包括网站设计制作、网站设计、商城网站建设、微信营销、系统平台开发，与其他网站设计及系统开发公司不同，创新互联的整合解决方案结合了帮做网络品牌建设经验和互联网整合营销的理念，并将策略和执行紧密结合，为客户提供全网互联网整合方案。

第一步：自己搭建一个springmvc项目，很简单，网上百度都有；pom文件添加以下：

 
  
 org.springframework 
 spring-websocket 
 4.2.4.RELEASE 
  
 
 
  
 org.springframework 
 spring-messaging 
 4.2.4.RELEASE

我的spring版本是4.2.4的，所以websocket也是4.2.4的；websocket最好和spring版本保持一致

第二步：编写消息处理器

/** 
 * Project Name:springRabbitMQ 
 * File Name:MyMessageHandler.java 
 * Package Name:com.zsy.websocket 
 * Date:2018年1月31日上午11:10:03 
 * Copyright (c) 2018, zhaoshouyun All Rights Reserved. 
 * 
 */ 
 
package com.zsy.websocket; 
 
import java.io.IOException; 
import java.util.Map; 
import java.util.Set; 
import java.util.concurrent.ConcurrentHashMap; 
 
import org.apache.commons.lang3.StringUtils; 
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; 
 
/** 
 * ClassName: MyMessageHandler 
 * Function: 实现webscoket接口 
 * date: 2018年1月31日 上午11:10:03 
 * @author zhaoshouyun 
 * @version 
 * @since JDK 1.7 
 */ 
public class MyMessageHandler implements WebSocketHandler { 
 //用户key 
 public static final String USER_KEY = "current_user"; 
 
 /** 
 * userMap:存储用户连接webscoket信息 
 * @since JDK 1.7 
 */ 
 private final static Map userMap; 
 static { 
 userMap = new ConcurrentHashMap(30); 
 } 
 /** 
 * 关闭websocket时调用该方法 
 * @see org.springframework.web.socket.WebSocketHandler#afterConnectionClosed(org.springframework.web.socket.WebSocketSession, org.springframework.web.socket.CloseStatus) 
 */ 
 @Override 
 public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception { 
  String userId = this.getUserId(session); 
  if(StringUtils.isNoneBlank(userId)){ 
  userMap.remove(userId); 
  System.err.println("该" + userId +"用户已成功关闭"); 
  }else{ 
  System.err.println("关闭时，获取用户id为空"); 
  } 
 
 } 
 
 /** 
 * 建立websocket连接时调用该方法 
 * @see org.springframework.web.socket.WebSocketHandler#afterConnectionEstablished(org.springframework.web.socket.WebSocketSession) 
 */ 
 @Override 
 public void afterConnectionEstablished(WebSocketSession session) throws Exception { 
 String userId = this.getUserId(session); 
 if(StringUtils.isNoneBlank(userId)){ 
  userMap.put(userId, session); 
  session.sendMessage(new TextMessage("建立WebSocket连接成功！")); 
 } 
 
 } 
 
 /** 
 * 客户端调用websocket.send时候，会调用该方法,进行数据通信 
 * @see org.springframework.web.socket.WebSocketHandler#handleMessage(org.springframework.web.socket.WebSocketSession, org.springframework.web.socket.WebSocketMessage) 
 */ 
 @Override 
 public void handleMessage(WebSocketSession session, WebSocketMessage<?> message) throws Exception { 
  String msg = message.toString(); 
  String userId = this.getUserId(session); 
  System.err.println("该"+userId+"用户发送的消息是："+msg); 
  message = new TextMessage("服务端已经接收到消息，msg="+msg); 
  session.sendMessage(message); 
 
 } 
 
 /** 
 * 传输过程出现异常时，调用该方法 
 * @see org.springframework.web.socket.WebSocketHandler#handleTransportError(org.springframework.web.socket.WebSocketSession, java.lang.Throwable) 
 */ 
 @Override 
 public void handleTransportError(WebSocketSession session, Throwable e) throws Exception { 
 WebSocketMessage message = new TextMessage("异常信息："+e.getMessage()); 
 session.sendMessage(message); 
 } 
 
 /** 
 * 
 * @see org.springframework.web.socket.WebSocketHandler#supportsPartialMessages() 
 */ 
 @Override 
 public boolean supportsPartialMessages() { 
 
 return false; 
 } 
 
 /** 
 * sendMessageToUser:发给指定用户 
 * @author zhaoshouyun 
 * @param userId 
 * @param contents 
 * @since JDK 1.7 
 */ 
 public void sendMessageToUser(String userId,String contents) { 
 WebSocketSession session = userMap.get(userId); 
 if(session !=null && session.isOpen()) { 
  try { 
    TextMessage message = new TextMessage(contents); 
  session.sendMessage(message); 
  } catch (IOException e) { 
  e.printStackTrace(); 
  } 
 } 
 } 
 
 /** 
 * sendMessageToAllUsers:发给所有的用户 
 * @author zhaoshouyun 
 * @param contents 
 * @since JDK 1.7 
 */ 
 public void sendMessageToAllUsers(String contents) { 
  Set userIds = userMap.keySet(); 
  for(String userId: userIds) { 
  this.sendMessageToUser(userId, contents); 
  } 
 } 
 
 /** 
 * getUserId:获取用户id 
 * @author zhaoshouyun 
 * @param session 
 * @return 
 * @since JDK 1.7 
 */ 
 private String getUserId(WebSocketSession session){ 
 try { 
  String userId = (String)session.getAttributes().get(USER_KEY); 
  return userId; 
 } catch (Exception e) { 
  e.printStackTrace(); 
 } 
 return null; 
 } 
 
}

第三步：编写websocket相关配置，当然可以在xml配置；我现在没有使用xml配置，使用代码配置，需要在xml里添加扫描包

/** 
 * Project Name:springRabbitMQ 
 * File Name:WebSocketConfig.java 
 * Package Name:com.zsy.websocket 
 * Date:2018年1月31日下午1:10:33 
 * Copyright (c) 2018, zhaoshouyun All Rights Reserved. 
 * 
*/ 
/** 
 * Project Name:springRabbitMQ 
 * File Name:WebSocketConfig.java 
 * Package Name:com.zsy.websocket 
 * Date:2018年1月31日下午1:10:33 
 * Copyright (c) 2018, zhaoshouyun All Rights Reserved. 
 * 
 */ 
 
package com.zsy.websocket; 
 
import org.springframework.context.annotation.Bean; 
import org.springframework.context.annotation.Configuration; 
import org.springframework.web.socket.WebSocketHandler; 
import org.springframework.web.socket.config.annotation.EnableWebSocket; 
import org.springframework.web.socket.config.annotation.WebSocketConfigurer; 
import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry; 
 
/** 
 * ClassName: WebSocketConfig 
 * Function: TODO ADD FUNCTION. 
 * date: 2018年1月31日 下午1:10:33 
 * @author zhaoshouyun 
 * @version 
 * @since JDK 1.7 
 */ 
@Configuration 
@EnableWebSocket 
public class WebSocketConfig implements WebSocketConfigurer { 
 
 /** 
 * 注册handle 
 * @see org.springframework.web.socket.config.annotation.WebSocketConfigurer#registerWebSocketHandlers(org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry) 
 */ 
 @Override 
 public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) { 
  registry.addHandler(myHandler(), "/testHandler").addInterceptors(new WebSocketInterceptor()); 
  registry.addHandler(myHandler(), "/socketJs/testHandler").addInterceptors(new WebSocketInterceptor()).withSockJS(); 
 
 } 
 
 @Bean 
 public WebSocketHandler myHandler(){ 
 return new MyMessageHandler(); 
 } 
 
}

第四步：编写websocket适配器

package com.zsy.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.support.HttpSessionHandshakeInterceptor; 
 
/** 
 * ClassName: WebSocketInterceptor 
 * Function: TODO ADD FUNCTION. 
 * date: 2018年1月31日 上午11:42:34 
 * @author zhaoshouyun 
 * @version 
 * @since JDK 1.7 
 */ 
public class WebSocketInterceptor extends HttpSessionHandshakeInterceptor { 
 /** 
 * TODO 简单描述该方法的实现功能（可选）. 
 * @see org.springframework.web.socket.server.support.HttpSessionHandshakeInterceptor#beforeHandshake(org.springframework.http.server.ServerHttpRequest, org.springframework.http.server.ServerHttpResponse, org.springframework.web.socket.WebSocketHandler, java.util.Map) 
 */ 
 @Override 
 public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, 
  Map attributes) throws Exception { 
 if(request instanceof ServletServerHttpRequest){ 
  ServletServerHttpRequest serverHttpRequest = (ServletServerHttpRequest)request; 
  //获取参数 
  String userId = serverHttpRequest .getServletRequest().getParameter("userId"); 
  attributes.put(MyMessageHandler.USER_KEY, userId); 
 } 
  
 return true; 
 } 
}

第五步对应的js：

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" 
 pageEncoding="ISO-8859-1"%> 
 
 
 
 
Insert title here

第六步测试：

package com.zsy.test.controller; 
 
import java.util.HashMap; 
import java.util.Map; 
 
import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.beans.factory.annotation.Value; 
import org.springframework.stereotype.Controller; 
import org.springframework.web.bind.annotation.RequestBody; 
import org.springframework.web.bind.annotation.RequestMapping; 
import org.springframework.web.bind.annotation.ResponseBody; 
 
import com.zsy.websocket.MyMessageHandler; 
 
/** 
 * ClassName: TestController 
 * Function: TODO ADD FUNCTION. 
 * date: 2017年12月14日 上午11:11:23 
 * @author zhaoshouyun 
 * @version 
 * @since JDK 1.7 
 */ 
@Controller 
public class TestController { 
 
 
 
 @Autowired 
 MyMessageHandler handler; 
  
 @RequestMapping("/get") 
 public String get(){ 
 return "index"; 
 } 
 
 @ResponseBody 
 @RequestMapping("/get1") 
 public String send(String name){ 
 handler.sendMessageToUser("zhaoshouyun", "服务端发送的内容:"+name); 
 return "success"; 
 } 
 
 
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持创新互联。

网页名称：基于spring实现websocket实时推送实例
URL链接：http://cdweb.net/article/pjchjp.html

NEWS

网站建设资讯

基于spring实现websocket实时推送实例

其他资讯