使用Enum和异常控制器

2022-03-18 642 words 2 minutes

Contents

使用Enum和异常控制器

目的：避免定义各种异常类

基础：已经做了统一返回处理

Enum

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public enum ResultCodeEnum {

    /**
     * 成功
     */
    SUCCESS(200, "操作成功"),

    /**
     * 系统错误
     */
    ERROR(500, "系统错误"),

    /**
     * 操作失败
     */
    FAILED(101, "操作失败"),


    /**
     * 参数错误
     */
    PARAM_ERROR(103, "参数错误"),

    /**
     * 参数错误-已存在
     */
    INVALID_PARAM_EXIST(104, "请求参数已存在"),

    /**
     * 参数错误
     */
    INVALID_PARAM_EMPTY(105, "请求参数为空"),

    /**
     * 参数错误
     */
    PARAM_TYPE_MISMATCH(106, "参数类型不匹配"),

    /**
     * 参数错误
     */
    PARAM_VALID_ERROR(107, "参数校验失败"),

    /**
     * 参数错误
     */
    ILLEGAL_REQUEST(108, "非法请求");


    public int code;

    public String msg;

    ResultCodeEnum(int code, String msg) {
        this.code = code;
        this.msg = msg;
    }

    public int getCode() {
        return code;
    }

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

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }
}

自定义业务异常类

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public class BusinessException extends RuntimeException {

    private int code;

    private String msg;

    public BusinessException() {
        this.code = ResultCodeEnum.FAILED.code;
        this.msg = ResultCodeEnum.FAILED.msg;
    }

    public BusinessException(String message) {
        this.code = ResultCodeEnum.FAILED.code;
        this.msg = message;
    }

    public BusinessException(ResultCodeEnum resultCodeEnum){
        this.code = resultCodeEnum.code;
        this.msg = resultCodeEnum.msg;
    }

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

    public BusinessException(Throwable cause) {
        super(cause);
    }

    public BusinessException(String message, Throwable cause) {
        super(message, cause);
    }

    public String getMsg() {
        return msg;
    }

    public void setMsg(String msg) {
        this.msg = msg;
    }

    public int getCode() {
        return code;
    }

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

异常控制器

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@ControllerAdvice
public class RestResultExceptionHandler {

    @ResponseBody
    @ExceptionHandler(value = RuntimeException.class)
    public RestResult<?> handleRunTimeException(RuntimeException e) {
        return RestResultUtils.failedWithMsg(500, e.getMessage());
    }


    /**
     * 自定义业务异常-BusinessException
     */
    @ResponseBody
    @ExceptionHandler(value = {BusinessException.class})
    public AjaxResult handlerCustomException(BusinessException exception) {
        return AjaxResult.error(exception.getCode(), exception.getMsg());
    }

}