枚举 k-v 根据 k 获取 v

枚举 k-v 根据 k 获取 v

示例代码

public enum UploadType {
   未知(1,"未知"),
   类型2(2,"类型2"),
   类型1(3,"类型1");
   
   private int code;
   private String desc;
   private static Map<Integer, UploadType> map = new HashMap<>();
   static {
      for (UploadType value : UploadType.values()) {
         map.put(value.code, value);
      }
   }

   UploadType(int code, String desc) {
      this.code = code;
      this.desc = desc;
   }

   public int getCode() {
      return code;
   }

   public String getDesc() {
      return desc;
   }

   public static UploadType getByCode(Integer code) {
       // 注意 NPE 异常
      return map.get(code);
   }
}
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---

import lombok.Getter;

import java.util.Arrays;



/**
 * @description:
 * @author: shaoming
 * @date: 2022-09-08 15:47
 */
@Getter
public enum RequestReturnCodeEnum {
    /**
     * http 状态码其它状态 使用  0000 标识
     */
    CODE_0000(0000, "其它"),


    CODE_1011(1011, "网站连接错误"),

    CODE_200(200, "请求成功"),

    ;
    private Integer returnCode;
    private String codeDescription;

    RequestReturnCodeEnum(Integer returnCode, String codeDescription) {
        this.returnCode = returnCode;
        this.codeDescription = codeDescription;
    }

    public static RequestReturnCodeEnum get(Integer returnCode) {
        return Arrays.stream(RequestReturnCodeEnum.values())
                .filter(t -> t.returnCode.equals(returnCode))
                .findFirst()
                .orElse(null);
    }
}

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