java -通过bean中的某个元素信息获得实体全部信息

太过爱你忘了你带给我的痛 2024-02-21 09:54 65阅读 0赞

业务需求：

每一个省份都有`省份编码、省份号、省份名`三个信息，省份的所有信息都是已知并且固定的。通过某一个元素获得整个省份的所有信息。

业务代码：

package com.cyd.context;
    
    /**
     * 省份信息实体类
     */
    public class ProvinceInfo {
        
    
        private String provinceCode; // 省份编码
    
        private Integer provinceNumber; // 省份号
    
        private String provinceName; // 省份名
    
        private static final String EXCEPTION_INFORMATION = "省份信息不存在";
    
        private ProvinceInfo(String provinceCode, Integer provinceNumber, String provinceName) {
        
            this.provinceCode = provinceCode;
            this.provinceNumber = provinceNumber;
            this.provinceName = provinceName;
        }
    
        /**
         * 通过省份编码获得省份所有信息
         */
        public static ProvinceInfo ofProvinceCode(String provinceCode) {
        
    
            switch (provinceCode) {
        
                case "LN":
                    return liaoNing();
                case "ZJ":
                    return zheJiang();
                case "SH":
                    return shangHai();
                default:
                    throw new UnsupportedOperationException(EXCEPTION_INFORMATION);
            }
        }
    
    
        /**
         * 通过省份号获得省份所有信息
         */
        public static ProvinceInfo ofProvinceNumber(String provinceNumber) {
        
    
            switch (provinceNumber) {
        
                case "66":
                    return liaoNing();
                case "22":
                    return zheJiang();
                case "33":
                    return shangHai();
                default:
                    throw new UnsupportedOperationException(EXCEPTION_INFORMATION);
            }
        }
    
    
        /**
         * 通过省份号获得省份所有信息
         */
        public static ProvinceInfo ofProvinceNumber(int provinceNumber) {
        
    
            switch (provinceNumber) {
        
                case 66:
                    return liaoNing();
                case 22:
                    return zheJiang();
                case 33:
                    return shangHai();
                default:
                    throw new UnsupportedOperationException(EXCEPTION_INFORMATION);
            }
        }
    
    
        private static ProvinceInfo liaoNing(){
        
            return new ProvinceInfo("LN",66,"辽宁");
        }
    
        private static ProvinceInfo zheJiang(){
        
            return new ProvinceInfo("ZJ",22,"浙江");
        }
    
        private static ProvinceInfo shangHai(){
        
            return new ProvinceInfo("SH",33,"上海");
        }
    
        @Override
        public String toString() {
        
            return "ProvinceInfo{" +
                    "provinceCode='" + provinceCode + '\'' +
                    ", provinceNumber=" + provinceNumber +
                    ", provinceName='" + provinceName + '\'' +
                    '}';
        }
    }