使用枚举enum分类存放常量

àì夳堔傛蜴生んèń 2021-10-19 10:54 415阅读 0赞

## 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;
        }

![在这里插入图片描述][20190820204549399.png]

[20190820204549399.png]: /images/20211018/c34ea4a00e57472ea3334e09b4c01902.png