spring 自定义 ExcePtion

1. 自定义定义一个异常处理类 继承RuntimeException

public class BusinessExcePtion extends RuntimeException {

    //业务异常
    public static final String DEFAULT_ERR_MSG = "服务器异常";

    private String code;

    public BusinessExcePtion() {
        super(DEFAULT_ERR_MSG);
        this.code = BusinessExcePtionEnums.DEFAULT_ERR_CODE.code;
    }

    public BusinessExcePtion(String message) {

        super(message);
        this.code = BusinessExcePtionEnums.RECORD_NOT_EXISTS.code;
    }

    public String getCode() {
        return code;
    }

    public void setCode(String code) {
        this.code = code;
    }


}

2. 定义你得code错误码

public enum BusinessExcePtionEnums {

    /**
     * 服务器异常
     */
    DEFAULT_ERR_CODE("-99999"),

    /**
     * 请求参数不合法
     **/
    ILLEGAL_PARAMETER("-88888"),

    /**
     * 非法状态
     **/
    ILLEGAL_STATUS("-99997"),

    /**
     * 查询记录不存在
     **/
    RECORD_NOT_EXISTS("-99999"),

    SUCCESS("200");

    public static final String ERROR_PREFIX = "error.msg.";

    public final String code;

    BusinessExcePtionEnums(String s) {
        code = s;
    }
}

3. spring aop特性拦截系统返回

@ControllerAdvice
@ResponseBody
public class ExceptionHandle {

    @ExceptionHandler(value = BusinessExcePtion.class)
    public ExceptionResponse defaultErrorHandler(HttpServletRequest req, BusinessExcePtion e) {
        return new ExceptionResponse(e.getCode(), e.getMessage());
    }
}

4. 自定义返回bean

@Data
public class ExceptionResponse {
    private String code ;
    private String msg = "";

    public ExceptionResponse() {
    }

    public ExceptionResponse(String code, String msg) {
        this.code = code;
        this.msg = msg;
    }
}

5. OK 现在可以试着用一下了

throw new BusinessExcePtion("XXXXXX");