关于spring操作websocket的API

Question

package hello;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.messaging.simp.annotation.SendToUser;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.util.HtmlUtils;

@Controller
public class GreetingController {

    @MessageMapping("/hello")
    @SendTo("/topic/greetings")
    public Greeting greeting(HelloMessage message) throws Exception {
        Thread.sleep(1000); // simulated delay
        return new Greeting("Hello, " + HtmlUtils.htmlEscape(message.getName()) + "!");
    }


}

上面这个是官网的示例，但是这样还是客户端发送消息到@MessageMapping("/hello")触发的，没有体现主动发送消息啊

package hello;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.messaging.simp.annotation.SendToUser;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.util.HtmlUtils;

@Controller
public class GreetingController {


    Logger logger = LoggerFactory.getLogger(getClass());

    @MessageMapping("/hello")
    @SendTo("/topic/greetings")
    public Greeting greeting(HelloMessage message) throws Exception {
        Thread.sleep(1000); // simulated delay
        return new Greeting("Hello, " + HtmlUtils.htmlEscape(message.getName()) + "!");
    }


    @SendTo("/topic/greetings")
    private Greeting sayhello() {
        logger.info("hello已经发布");
        return new Greeting("Hello");
    }

    @ResponseBody
    @GetMapping("/httptouch")
    public boolean touchsocket() {
        logger.info("http已接收");
        sayhello();
        logger.info("方法执行");
        return true;
    }
}

上面这个是写的，我想通过另外发一个http请求去触发，不可以。
所以我想问下怎么主动发消息呢，蟹蟹大佬们。

Answer 1

https://www.cnblogs.com/jmcui/p/8992042.html