随笔（三）『SpringBoot自定义异常类』

1、定义异常类，继承RuntimeException

package com.baihua.common.exception;

import lombok.Data;

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

    private Integer code; // 异常码

    private String msg; // 异常信息

    public MyException(Integer code, String msg) {
        super(msg);
        this.code = code;
        this.msg = msg;
    }
}

2、全局接口异常处理类

package com.baihua.common.exception;

import com.baihua.common.utils.Result;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RestControllerAdvice;

@RestControllerAdvice // 全局接口异常处理,与@ExceptionHandler注解一起使用，全局可以捕获指定的异常
public class MyExceptionHandler {

    @ExceptionHandler(MyException.class) // 拦截捕捉指定的自定义异常 MyException
    public Result handleMyException(MyException e) {
        return new Result(e.getCode(), e.getMsg(), null);
    }
}