如何优雅的定义常量（枚举）

分手后的思念是犯贱 2021-12-12 11:53 391阅读 0赞

## 常量的定义 ##

在常量类中定义多个枚举，用于区分各个业务，避免混在一起乱七八糟的

/** * 常量类（枚举） * * @author GaoJinShan */
    public class Constants { 
    
        /** * 规则状态 * * @author GaoJinShan */
        public enum RuleStatus { 
            NORMAL(0, "正常"), NULLITY(1, "无效");
    
            private final Integer value;
            private final String name;
    
            RuleStatus(Integer value, String name) { 
                this.value = value;
                this.name = name;
            }
    
            public Integer getValue() { 
                return value;
            }
    
            public String getName() { 
                return name;
            }
        }
    
        /** * 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;
            }
        }
    
        /** * 接口状态码 * * @author GaoJinShan */
        public enum ResultEnum { 
    
            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");
    
    
            private String code;
            private String message;
    
            ResultEnum(String code, String message) { 
                this.code = code;
                this.message = message;
            }
    
            public String getCode() { 
                return code;
            }
    
            public String getMessage() { 
                return message;
            }
        }
    }

## 调用方法 ##

Constants.ResultEnum.SUCCESS.getCode()

如图：  
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