fix: msg不允许为空

wl

2022-12-23 b680856aa7a5c7225fae1ea81f2706f10437f373

 src/main/java/com/example/jz/JzApplication.java

@@ -1,11 +1,9 @@
package com.example.jz;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("com.example.jz.dao")
public class JzApplication {

    public static void main(String[] args) {