SpringBoot全局异常捕获

@ControllerAdvice  //定义为切面拦截所有
public class GlobalExceptionHandler {
    @ExceptionHandler(RuntimeException.class)
    @ResponseBody // 拦截返回是 json返回结果
    public Map<String, Object> exceptionHandler() {
        Map<String, Object> result=new HashMap<String, Object>();
        result.put("code","500");
        result.put("msg","系统错误");
        //这里可以处理
        return result;
    }

}