spring boot 定义全局异常

定义一个全局异常类
@ControllerAdvice
public class GlobalExceptionHandler{
  @ExceptionHandler(Exception.class) //处理所有异常
  @RequestBody  //指定返回的类型
  public Map<String,Object> handler(Exception e){
    Map<String,Object> result = new HashMap<String,Object>();
    result.put("errcode",500);
    result.put("errmsg", e.getMessage());
    return result;
  }
}