[Java知识库]java 枚举 根据code或desc 获取枚举对象

1，代码

public enum ResponseEnum {

    /**
     *  成功返回
     * */
    SUCCEED(0, "成功"),
    UNKNOWN(1001, "未知错误"),
  




    ;

    private static Map<String, ResponseEnum> messageMap;



    private final Integer code;

    private final String description;


    public static ResponseEnum messageOf(String message) {
        if (messageMap == null) {
            messageMap = Arrays.stream(ResponseEnum.values()).collect(Collectors.toMap(ResponseEnum::getDescription, e -> e));
        }
        return messageMap.getOrDefault(message, UNKNOWN);
    }

    ResponseEnum(Integer code, String description) {
        this.code = code;
        this.description = description;
    }

    public static ResponseEnum findByCode(Integer code){
       for (ResponseEnum responseEnum : values()){
         if(responseEnum.getCode().equals(code)){
            return responseEnum;
         }
       }
       return null;
    }

    public Integer getCode() {
        return code;
    }

    public String getDescription() {
        return description;
    }


//根据desc获取枚举对象
    public static <T extends ResponseEnum> T getEnumByDesc(Class<T> clazz, String desc) {
        for(T inner : clazz.getEnumConstants())
            if(inner.getDescription().equals(desc))
                return inner;
        return null;
    }

//根据code获取枚举对象
    public static <T extends ResponseEnum> T getEnumByCode(Class<T> clazz, Integer code) {
        for(T inner : clazz.getEnumConstants())
            if(inner.getCode().equals(code))
                return inner;
        return null;
    }

}

2，使用

		 //此处对后端抛出的异常做国际化处理
		 } catch (Exception e) {
                ImportTemplateDTO importDTO = cacheDto.get(dto.getRowIndex());
                //某个异常的枚举对象，如传入“成功”，则responseEnum为SUCCEED
                ResponseEnum responseEnum = ResponseEnum.getEnumByDesc(ResponseEnum.class,e.getLocalizedMessage());
                importDTO.setFailReason(messageConfig.storageStr(responseEnum.name()));
                ResponseEnum.getEnumByDesc(ResponseEnum.class,e.getLocalizedMessage());
                errorList.add(importDTO);
                iterator.remove();
                log.error(e.getLocalizedMessage());
            }