自定义异常类

　　成品

public class WebsiteException extends RuntimeException{

    private String resultCode;

    private String resultMsg;

    public WebsiteException(String resultCode, String resultMsg) {
        super(resultCode);
        this.resultCode = resultCode;
        this.resultMsg = resultMsg;
    }

    public WebsiteException(WebsiteCodeEnum codeEnum) {
        super(codeEnum.getCode());
        this.resultCode = codeEnum.getCode();
        this.resultMsg = codeEnum.getDesc();
    }

    public String getResultCode() {
        return resultCode;
    }

    public void setResultCode(String resultCode) {
        this.resultCode = resultCode;
    }

    public String getResultMsg() {
        return resultMsg;
    }

    public void setResultMsg(String resultMsg) {
        this.resultMsg = resultMsg;
    }
}

　　步骤：

1. 新建异常类，继承Exception 或 RuntimeException

   public class WebsiteException extends RuntimeException{
   
       private String resultCode;
   
       private String resultMsg;
   
   }

2. 根据需要新增构造（建议)

       public WebsiteException(String resultCode, String resultMsg) {
           super(resultCode);//调用父类构造，用于打印自定义错误信息
           this.resultCode = resultCode;
           this.resultMsg = resultMsg;
       }
   
       public WebsiteException(WebsiteCodeEnum codeEnum) {
           super(codeEnum.getCode());//调用父类构造，用于打印自定义错误信息
           this.resultCode = codeEnum.getCode();
           this.resultMsg = codeEnum.getDesc();
       }

3. 自定义Enum（养成好习惯）

   public enum WebsiteCodeEnum {
   
       SYSTEM_ERROR("SYSTEM_ERROR", "系统异常");
   
       private String code;
   
       private String desc;
   
       WebsiteCodeEnum() {
       }
   
       WebsiteCodeEnum(String code, String desc) {
           this.code = code;
           this.desc = desc;
       }
   
       public String getCode() {
           return code;
       }
   
       public void setCode(String code) {
           this.code = code;
       }
   
       public String getDesc() {
           return desc;
       }
   
       public void setDesc(String desc) {
           this.desc = desc;
       }
   }