使用枚举enum分类存放常量

定义一个java类，在类中定义多个枚举

/**
 * 常量类（枚举）
 *
 * @author GaoJinShan
 */
public class Constants {

    /**
     * 接口状态码
     *
     * @author GaoJinShan
     */
    public enum ResultCode {
        UNKNOWN_ERROR("-1", "未知错误"),
        SUCCESS("200", "成功"),
        PARAM_ERROR("201", "参数不合法"),
        DATABASE_ERROR("202", "数据库异常"),
        EXIST("403", "已存在");

        private String code;
        private String message;

        ResultCode(String code, String message) {
            this.code = code;
            this.message = message;
        }
        public String getCode() {
            return code;
        }
        public String getMessage() {
            return message;
        }
    }

    /**
     * 网络类型
     *
     * @author GaoJinShan
     */
    public enum NetworkType {
        WIRED(1, "有线网"), WIRELESS(2, "无线网");

        private final Integer value;
        private final String name;

        NetworkType(Integer value, String name) {
            this.value = value;
            this.name = name;
        }
        public Integer getValue() {
            return value;
        }
        public String getName() {
            return name;
        }
    }

}

注： 这样做解决了常量多且无序的痛点

调用

/**
     * @param @param  object
     * @param @return 设定文件
     * @return Result 返回类型
     * @Title: success
     * @Description: 成功有返回
     */
    public static Result success(Object object) {
        Result result = new Result(Constants.ResultCode.SUCCESS.getCode(), Constants.ResultCode.SUCCESS.getMessage());
        result.setData(object);
        return result;
    }

来源：https://blog.csdn.net/weixin_43995403/article/details/99882451