关于Springboot + hibernate 使用websocket的详细代码

在之前，学习Springboot的时候遇到了许多的问题，希望通过这个博客向爱好学习Springboot的人避免一些误区；

主要是Springboot + hibernate +websocket ，好了废话不多说开始吧：在之前我就不说springboot环境的问题了，网上教程也很多。

一、首先创建一个Springboot工程：

然后选择所需要的包：

然后先创建一个实体类：User类

@Entity@Table(name = "t_user")public class User {@Id@GeneratedValue(strategy = GenerationType.IDENTITY) //这是自增private int id;@Columnprivate String name;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}}

在src/main/resources/application.properties中配置数据库连接：

#这里是设置自定义端口号server.port=8088#连接数据库信息spring.datasource.url = jdbc:mysql://localhost:3306/mytestspring.datasource.username = rootspring.datasource.password = 1234spring.datasource.driverClassName = com.mysql.jdbc.Driverspring.datasource.max-active=20spring.datasource.max-idle=8spring.datasource.min-idle=8spring.datasource.initial-size=10## 实体类自动扫描的包前缀 entitymanager.packagesToScan= com.sanker.Bean######################################################### Specify the DBMSspring.jpa.database = MYSQL# Show or not log for each sql queryspring.jpa.show-sql = true# Hibernate ddl auto (create, create-drop, update)spring.jpa.hibernate.ddl-auto = updatespring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

注意：如果你的实体类属性为userName 中有大写的情况 ，数据库自动建表的字段是：user_name；

在来创建一个websocket类：

主要是websocket的配置类很重要：websocketconfig

import org.springframework.context.annotation.Bean;import org.springframework.web.socket.WebSocketHandler;import org.springframework.web.socket.config.annotation.WebSocketConfigurer;import org.springframework.web.socket.config.annotation.WebSocketHandlerRegistry;@Configuration@EnableWebSocketpublic class WebsocketConfig implements WebSocketConfigurer {@Overridepublic void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {// TODO Auto-generated method stubregistry.addHandler(WebSocketController(), "/websocket")//这里是地址.setAllowedOrigins("*");//设置所有的域名都可以访问，也就是说可以跨域访问}@Bean  //这里就是给websocket.Java类说明他是一个websocket控制器    public WebSocketHandler WebSocketController() {         return new WebSocket();      }  }

这样写websocket类里面就可以注入属性了！！！！！！这个很重要；

import java.io.IOException;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;public class WebSocket extends TextWebSocketHandler {private WebSocketSession session;/** * 连接关闭调用函数 */@Overridepublic void afterConnectionClosed(WebSocketSession session, CloseStatus arg1) throws Exception {// TODO Auto-generated method stubSystem.out.println("afterConnectionClosed");}/** * 建立Websocket连接成功调用函数 */@Overridepublic void afterConnectionEstablished(WebSocketSession session) throws Exception {// TODO Auto-generated method stubthis.session= session;System.out.println("afterConnectionEstablished");}/** * 接受到客服端发送的消息 */@Overridepublic void handleTextMessage(WebSocketSession session, TextMessage message) throws Exception {// TODO Auto-generated method stub}@Overridepublic void handleTransportError(WebSocketSession session, Throwable arg1) throws Exception {// TODO Auto-generated method stubSystem.out.println("handleTransportError");}@Overridepublic boolean supportsPartialMessages() {// TODO Auto-generated method stubSystem.out.println("supportsPartialMessages");return false;}/** * 发送消息 *  * @param msg */public void sendTextMessage(String msg) {TextMessage t = new TextMessage(msg);try {session.sendMessage(t);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}

如果写@ServerEndpoint    是不能注入属性的。大概就这样了