socket实现java聊天室，公告等功能，前后端分离（附源码）
pom文件
org.springframework.boot
spring-boot-starter-websocket
application.yml中端口设置
server:
port: 11112
下面是代码
package com.websocket.demo.websocket;
import org.junit.jupiter.api.Test;
import org.springframework.web.socket.CloseStatus;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketSession;
import org.springframework.web.socket.handler.TextWebSocketHandler;
import java.io.IOException;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
/**
* @author lzy
* @Date 2019/8/14 9:44
* @Version 1.0
* @name 创建处理器
*/
public class WebSocketPushHandler extends TextWebSocketHandler {
private static final List USER_LIST = new ArrayList<>();
/**
* 用户进入系统监听
*/
@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
System.out.println("3.用户进入系统。。。");
System.out.println("用户信息:" + session.getAttributes());
Map map = session.getAttributes();
for (String key : map.keySet()) {
System.out.println("key:" + key + " and value:" + map.get(key));
}
USER_LIST.add(session);
}
/**
* 处理用户请求
*/
@Override
protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
System.out.println("系统处理xxx用户的请求信息。。。");
System.out.println("===>>> 当前系统用户数为:"+USER_LIST.size());
System.out.println("用户所发送消息为："+message.getPayload() );
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.append("----------------"+ LocalTime.now() +"----------------");
stringBuilder.append("当前系统在线用户数为:"+USER_LIST.size()+"
");
stringBuilder.append("用户"+session.getAttributes().get("userId")+"：
");
stringBuilder.append(""+message.getPayload()+"
");
TextMessage textMessage = new TextMessage(stringBuilder.toString());
//向所有用户广播消息
sendMessagesToUsers(textMessage);
}
/**
* 用户退出后的处理
*/
@Override
public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
if (session.isOpen()) {
session.close();
}
System.out.println("===>>> 退出系统时用户数为:"+USER_LIST.size());
USER_LIST.remove(session);
System.out.println(session.getAttributes().get("userId")+"xxx用户退出系统。。。");
}
/**
* 自定义函数
* 给所有的在线用户发送消息
*/
public static void sendMessagesToUsers(TextMessage message) {
for (WebSocketSession user : USER_LIST) {
try {
// isOpen()在线就发送
if (user.isOpen()) {
StringBuilder stringBuilder = new StringBuilder();
stringBuilder
.append("########################################
")
.append(" ").append(LocalDateTime.now()).append("
")
.append("[用户]
")
.append(message.getPayload()).append("
")
.append("########################################
");
TextMessage textMessage = new TextMessage(stringBuilder);
user.sendMessage(textMessage);
}
} catch (IOException e) {
e.printStackTrace();
System.out.println(e.getLocalizedMessage());
}
}
}
/**
* 自定义函数
* 发送消息给指定的在线用户
*/
public static void sendMessageToUser(String userId, TextMessage message) {
for (WebSocketSession user : USER_LIST) {
if (user.getAttributes().get("userId").equals(userId)) {
try {
// isOpen()在线就发送
if (user.isOpen()) {
StringBuilder stringBuilder = new StringBuilder();
stringBuilder
.append("########################################
")
.append(" ").append(LocalDateTime.now()).append("
")
.append("[用户]
")
.append(message.getPayload()).append("
")
.append("########################################
");
TextMessage textMessage = new TextMessage(stringBuilder);
user.sendMessage(textMessage);
}
} catch (IOException e) {
e.printStackTrace();
System.out.println(e.getLocalizedMessage());
}
}
}
}
@Test
public void Test(List USER_LIST){
for (WebSocketSession user : USER_LIST) {
System.out.println(user);
}
}
}
package com.websocket.demo.websocket;
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;
import java.util.Map;
/**
* @author lzy
* @Date 2019/8/14 9:41
* @Version 1.0
* @name 创建握手 此类用来获取登录用户信息并交由websocket管理
* @Description HandshakeInterceptor WebSocket握手请求的拦截器. 检查握手请求和响应, 对WebSocketHandler传递属性
*/
public class MyWebSocketInterceptor implements HandshakeInterceptor {
/**
* 在握手之前执行该方法, 继续握手返回true, 中断握手返回false. 通过attributes参数设置WebSocketSession的属性
*/
@Override
public boolean beforeHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler, Map attributes) throws Exception {
System.out.println("1.用户建立连接。。。");
if (request instanceof ServletServerHttpRequest) {
String userId = ((ServletServerHttpRequest) request).getServletRequest().getParameter("userId");
attributes.put("userId", userId);
System.out.println("用户唯一标识:" + userId);
}
return true;
}
/**
* 在握手之后执行该方法. 无论是否握手成功都指明了响应状态码和相应头.
*/
@Override
public void afterHandshake(ServerHttpRequest request, ServerHttpResponse response, WebSocketHandler wsHandler,Exception exception) {
System.out.println("2.在握手之后执行该方法. 无论是否握手成功都指明了响应状态码和相应头");
}
}
package com.websocket.demo.config;
import com.websocket.demo.websocket.MyWebSocketInterceptor;
import com.websocket.demo.websocket.WebSocketPushHandler;
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;
import org.springframework.web.socket.server.HandshakeInterceptor;
/**
* @author lzy
* @Date 2019/8/14 9:47
* @Version 1.0
* @name websocket配置类
*/
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
/**
* 注册WebSocket处理类
*/
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
System.out.println("注册WebSocket处理类");
registry.addHandler(createWebSocketPushHandler(), "/webSocketServer")
.addInterceptors(createHhandshakeInterceptor()).setAllowedOrigins("*");
registry.addHandler(createWebSocketPushHandler(), "/sockjs/webSocketServer")
.addInterceptors(createHhandshakeInterceptor()).withSockJS();
}
/**
*
* @Title: createHhandshakeInterceptor
* @Description: 握手拦截器
* @return
*/
@Bean
public HandshakeInterceptor createHhandshakeInterceptor() {
System.out.println("握手拦截器");
return new MyWebSocketInterceptor();
}
/**
*
* @Title: createWebSocketPushHandler
* @Description: 处理类
* @return
*/
@Bean
public WebSocketHandler createWebSocketPushHandler() {
System.out.println("处理类");
return new WebSocketPushHandler();
}
}
package com.websocket.demo.controller;
import com.websocket.demo.websocket.WebSocketPushHandler;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.socket.TextMessage;
import org.springframework.web.socket.WebSocketSession;
/**
* @author lzy
* @Date 2019/8/14 14:51
* @Version 1.0
* @name
*/
@RestController
@RequestMapping("/msg")
public class MsgController {
/**
* 功能描述:向全体广播消息
* @param: [msg] 消息内容
* @return: boolean
* @auther: lzy
* @date: 2019/8/14 16:10
*/
@PostMapping("/sendMsg")
public boolean sendMsg(String msg){
System.out.println("全体广播消息 ["+msg+"]");
TextMessage textMessage = new TextMessage(msg);
try{
WebSocketPushHandler.sendMessagesToUsers(textMessage);
}catch (Exception e){
return false;
}
return true;
}
/**
* 功能描述:向指定用户发送消息
* @param msg 消息内容
* @param userId 用户编号
* @return: boolean
* @auther: lzy
* @date: 2019/8/14 16:13
*/
@PostMapping("/sendMsgByUser")
public boolean sendMsgByUser(String msg,String userId){
System.out.println("向 "+userId+" 发送消息，消息内容为:"+msg);
TextMessage textMessage = new TextMessage(msg);
try{
WebSocketPushHandler.sendMessageToUser(userId,textMessage);
}catch (Exception e){
return false;
}
return true;
}
}
页面代码
Java后端WebSocket的Tomcat实现
Welcome
源码下载链接：https://download.csdn.net/download/qq_39187822/11546600