SpringBoot中使用Servlet
在SpringBoot启动类添加@ServletComponentScan注解

问题：tomcat8.5会只返回200，不返回OK
解决办法：response.setStatus(HttpServletResponse.SC_OK,“OK”);

websocket java使用demo。包含客户端与服务端使用
客户端依赖：

org.glassfish.tyrus.bundles tyrus-standalone-client 1.13 客户端的类库，千万不要使用下面这段。 javax.websocket javax.websocket-client-api 1.1

如果使用上面的类库会出现下面异常

Exception in thread “main” java.lang.RuntimeException: Could not find an implementation class.
at javax.websocket.ContainerProvider.getWebSocketContainer(ContainerProvider.java:73)
at connect.(connect.java:21)
at test.main(test.java:11)

客户端代码：

package com.xxg.websocket.client;

import java.io.IOException;
import java.net.URI;

import javax.websocket.ClientEndpoint;
import javax.websocket.ContainerProvider;
import javax.websocket.OnClose;
import javax.websocket.OnError;
import javax.websocket.OnMessage;
import javax.websocket.OnOpen;
import javax.websocket.Session;
import javax.websocket.WebSocketContainer;

@ClientEndpoint
public class WebSocketClient {

private Session session = null;

private int count = 0;

@OnOpen
public void onOpen(Session session){
	sendMessage("onOpen hello benny onOpen");
}

@OnClose
public void onClose(){
	
}

@OnMessage
public void onMessage(String message, Session session){
	System.out.println("server message:"+message);
	if(count <10){
		sendMessage("onMessage hello benny "+(++count));
	}
}

@OnError
public void onError(Throwable thr){
	
}

public WebSocketClient() {
	super();
}

public WebSocketClient(URI endpointURI) {
	super();
	try {
		WebSocketContainer container = ContainerProvider.getWebSocketContainer();	// 获得WebSocketContainer
		this.session = container.connectToServer(WebSocketClient.class, endpointURI);	// 该方法会阻塞
	} catch (Exception e) {
		throw new RuntimeException(e);
	}
}

public Session getSession() {
	return session;
}

public void setSession(Session session) {
	this.session = session;
}


public void sendMessage(String message){
	try {
		this.session.getBasicRemote().sendText(message);
		
	} catch (IOException e) {
		// TODO Auto-generated catch block
		e.printStackTrace();
	}finally {
		try {
			this.session.getBasicRemote().flushBatch();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

}