# 添加架包
在 pom 文件中添加一下坐标
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| <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-websocket</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-messaging</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.9.5</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.9.5</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.9.5</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-jaxb-annotations</artifactId>
<version>2.9.5</version>
</dependency>
|
编写 config 类
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| package com.yuyun.elevator.controller.websocket;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
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.handler.TextWebSocketHandler;
import org.springframework.web.socket.server.support.HttpSessionHandshakeInterceptor;
@Configuration
@EnableWebMvc
@EnableWebSocket
public class WebSocketConfig extends WebMvcConfigurationSupport implements WebSocketConfigurer {
@Override
public void registerWebSocketHandlers(WebSocketHandlerRegistry webSocketHandlerRegistry) {
webSocketHandlerRegistry.addHandler(webSocketHandler(), "/websocket").addInterceptors(new HttpSessionHandshakeInterceptor()).setAllowedOrigins("*");
webSocketHandlerRegistry.addHandler(webSocketHandler(), "/sockjs").addInterceptors(new HttpSessionHandshakeInterceptor()).withSockJS();
}
@Bean
public TextWebSocketHandler webSocketHandler(){
SpringWebSocketHandler springWebSocketHandler = new SpringWebSocketHandler();
return springWebSocketHandler;
}
}
编写SpringWebSocketHandler
package com.yuyun.elevator.controller.websocket;
import org.springframework.web.socket.*;
import org.springframework.web.socket.handler.TextWebSocketHandler;
public class SpringWebSocketHandler extends TextWebSocketHandler {
@Override
public void afterConnectionEstablished(WebSocketSession session) throws Exception {
System.out.println("连接成功!");
super.afterConnectionEstablished(session);
}
@Override
public void handleMessage(WebSocketSession session, WebSocketMessage<?> message) throws Exception {
session.sendMessage(message);
super.handleMessage(session, message);
}
@Override
protected void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {
super.handleTextMessage(session, message);
}
}
|
注意:spring 默认会给一个 OriginHandshakeInterceptor 的拦截器
解决办法
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| （setAllowedOrigins(“*”)）
webSocketHandlerRegistry.addHandler(webSocketHandler(), “/websocket”).addInterceptors(new HttpSessionHandshakeInterceptor()).setAllowedOrigins(“*”);
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