Spring Boot全局异常处理

import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 *  全局异常处理
 */
@ControllerAdvice
public class MyExceptionHandler {

    /**
     *  异常处理
     * @param request
     * @param e
     * @param response
     * @return
     */
    @ExceptionHandler(value = {Exception.class})    //要拦截的异常
    @ResponseBody
    public String MyException(HttpServletRequest request,Exception e, HttpServletResponse response) {
        //错误信息
        e.getMessage();

        //可以在这里设置返回的错误格式
        return null;
    }
}

自定义异常实体类

import lombok.Getter;
import org.springframework.http.HttpStatus;

import static org.springframework.http.HttpStatus.BAD_REQUEST;

/**
 * @ClassName 自定义异常
 **/
@Getter
public class MyException extends RuntimeException{

   private Integer status = BAD_REQUEST.value();

    public MyException(String msg){
        super(msg);
    }

    public MyException(HttpStatus status,String msg){
        super(msg);
        this.status = status.value();
    }
}