springboot+websocket实现担任聊天 代码
时间: 2023-08-31 08:24:42 浏览: 257
Springboot基于websocket实现简单在线聊天功能
### 回答1:
Spring Boot的WebSocket实现支持简单的即时聊天应用程序的构建,可以在服务器和客户端之间双向传输消息。主要步骤如下:1. 添加WebSocket依赖
2. 实现WebSocketConfigurer接口,并重写registerWebSocketHandlers()方法
3. 编写WebSocket消息处理器
4. 测试WebSocket应用程序
### 回答2:
实现Spring Boot中的WebSocket聊天功能代码可以按照以下步骤进行:
1. 首先,确保你的项目中已添加了相关的依赖,包括`spring-boot-starter-websocket`和`spring-boot-starter-thymeleaf`。可以在`pom.xml`中添加如下依赖:
```xml
<dependencies>
<!-- Spring Boot WebSocket -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
<!-- Spring Boot Thymeleaf -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
</dependencies>
```
2. 创建一个`WebSocketConfig`类,用于配置WebSocket:
```java
import org.springframework.context.annotation.Configuration;
import org.springframework.web.socket.config.annotation.EnableWebSocket;
import org.springframework.web.socket.config.annotation.WebSocketConfigurer;
import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
private final WebSocketHandler webSocketHandler;
public WebSocketConfig(WebSocketHandler webSocketHandler) {
this.webSocketHandler = webSocketHandler;
}
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry.addHandler(webSocketHandler, "/chat").setAllowedOrigins("*");
}
}
```
3. 创建一个`WebSocketHandler`类,实现WebSocket的处理逻辑:
```java
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 java.io.IOException;
import java.util.ArrayList;
import java.util.List;
@Component
public class ChatWebSocketHandler implements WebSocketHandler {
private List<WebSocketSession> sessions = new ArrayList<>();
@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
sessions.add(session);
}
@Override
public void handleMessage(WebSocketSession session, WebSocketMessage<?> message) throws Exception {
for (WebSocketSession s : sessions) {
s.sendMessage(new TextMessage(message.getPayload().toString()));
}
}
@Override
public void afterConnectionClosed(WebSocketSession session, CloseStatus closeStatus) throws Exception {
sessions.remove(session);
}
@Override
public void handleTransportError(WebSocketSession session, Throwable exception) throws Exception {
session.close();
}
@Override
public boolean supportsPartialMessages() {
return false;
}
}
```
4. 创建一个`ChatController`类,用于处理聊天页面的请求:
```java
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
@Controller
public class ChatController {
@GetMapping("/chat")
public String chat() {
return "chat";
}
}
```
5. 创建一个`chat.html`文件,作为聊天页面的视图:
```html
<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
<title>Chat</title>
</head>
<body>
<div id="messageContainer"></div>
<script>
var socket = new WebSocket("ws://" + location.host + "/chat");
socket.onmessage = function (event) {
var messageContainer = document.getElementById('messageContainer');
var message = document.createElement('p');
message.innerHTML = event.data;
messageContainer.appendChild(message);
};
document.onkeydown = function (event) {
if (event.keyCode === 13) {
var input = document.querySelector('input[name="message"]');
socket.send(input.value);
input.value = '';
}
};
</script>
</body>
</html>
```
6. 启动应用,并在浏览器中访问`http://localhost:8080/chat`,即可看到聊天页面。在多个浏览器窗口中打开该页面,它们之间可以实时互相发送消息并显示在页面上。
这是一个简单的Spring Boot中实现WebSocket聊天功能的代码示例,你可以根据实际需求进行调整和扩展。
### 回答3:
Spring Boot通过Spring WebSocket提供了实现WebSocket的功能。下面是实现基本聊天功能的Spring Boot WebSocket的代码。
1. 创建一个Spring Boot项目,并添加以下Maven依赖到pom.xml文件中:
```xml
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-websocket</artifactId>
</dependency>
</dependencies>
```
2. 创建一个WebSocket配置类,用于配置WebSocket相关的Bean。
```java
@Configuration
@EnableWebSocket
public class WebSocketConfig implements WebSocketConfigurer {
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
registry.addHandler(new ChatHandler(), "/chat").setAllowedOrigins("*");
}
}
```
3. 创建一个WebSocket处理程序,用于处理来自客户端的WebSocket消息。
```java
public class ChatHandler extends TextWebSocketHandler {
private List<WebSocketSession> sessions = new ArrayList<>();
@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
sessions.add(session);
}
@Override
protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
for (WebSocketSession s : sessions) {
s.sendMessage(message);
}
}
@Override
public void afterConnectionClosed(WebSocketSession session, CloseStatus status) throws Exception {
sessions.remove(session);
}
}
```
4. 创建一个Controller类,用于处理聊天页面的请求。
```java
@Controller
public class ChatController {
@GetMapping("/chat")
public String chat() {
return "chat";
}
}
```
5. 在templates目录下创建一个chat.html文件,用于展示聊天页面。
```html
<!DOCTYPE html>
<html>
<head>
<title>Chat</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script>
var socket = new WebSocket("ws://localhost:8080/chat");
socket.onmessage = function(event) {
var message = event.data;
$("#chat").append('<p>' + message + '</p>');
}
function sendMessage() {
var message = $("#message").val();
socket.send(message);
$("#message").val("");
}
</script>
</head>
<body>
<input type="text" id="message"><button onclick="sendMessage()">Send</button>
<div id="chat"></div>
</body>
</html>
```
以上代码实现了一个简单的聊天功能,客户端向服务端发送消息并显示在页面中,同时服务端将消息广播给所有客户端。通过访问http://localhost:8080/chat可以打开聊天页面。
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