ERROR 15708 --- [nboundChannel-4] .WebSocketAnnotationMethodMessageHandler : Unhandled exception from message handler method.
org.springframework.messaging.handler.annotation.support.MethodArgumentNotValidException: Could not resolve method parameter at index 0 in public void com.XX.energymanagement.controller.ElectorDevsDataController.getDevsData(java.lang.String,org.springframework.messaging.simp.SimpMessageHeaderAccessor): 1 error(s): [Error in object 'reqValue': codes []; arguments []; default message [Payload value must not be empty]]
前台html代码：
stompClient.send("/app/getDevsData", {}, value);
stompClient.subscribe('/topic/devsData', function (data) {
console.log("name --"+data.body);
后台java代码：
//reqValue-前台传入的参数
//headerAccessor 获取前台的SessionId
@MessageMapping("/getDevsData")
public void getDevsData1(String reqValue, SimpMessageHeaderAccessor headerAccessor){
//省略业务逻辑
messagingTemplate.convertAndSend("/topic/devsData", resultJson.toString());
错误原因：
参数reqValue="" （reqValue=" "不会报错）或者reqValue=null;
检查前台代码中value值
ERROR 15708 --- [nboundChannel-4] .WebSocketAnnotationMethodMessageHandler : Unhandled exception from message handler method.org.springframework.messaging.handler.annotation.support.MethodArgumentNo...
【WebSocket】SpringBoot中，WebSocket客户端连接服务端时，出现SockJsException: Uncaught failure in SockJS...异常信息
