制作数据字典工具类

た入场券 2022-03-15 01:07 398阅读 0赞

制作简单的数据字典工具类，以下代码提供简单思路，请自行优化。

1。设计数据字典表。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl8zOTg1NzU1Ng_size_16_color_FFFFFF_t_70][]

2。制作工具类：数据字典最常用的两个方法是获取下拉列表所有的选项，和获取字典码对应的值。

/**
     * @作者: LYB
     * @创建日期: 2018/8/6
     * @描述:数据字典工具
     */
    public final class DictUtils {
    
        /**
         * 存储字典
         */
        private static Map<String, List<Map<String, Object>>> dictMaps = new ConcurrentHashMap<>();//可换redis存储
    
        static {
            DictService dictService = new DictServiceImpl();
            final List<Dict> dicts = dictService.selectAllEnabled();//获取所有已启用的数据字典
            //先对字典进行排序，根据排序字段排序
            Collections.sort(dicts, new Comparator<Dict>() {
                public int compare(Dict dict1, Dict dict2) {
                    return dict1.getSort().compareTo(dict2.getSort());
                }
            });
            for (Dict dict : dicts) {
                String code = dict.getCode();
                Long type = dict.getType();
                String content = dict.getContent();
                if (dictMaps.get(code) == null) {//查看字典集合是否已经有该数据,如果没有就创建
                    List<Map<String, Object>> dictList = new LinkedList<>();
                    Map<String, Object> dictMap = new HashMap<>();
                    dictMap.put(dict.getType().toString(), dict.getContent());
                    dictList.add(dictMap);
                    dictMaps.put(code,dictList);
                }else{//如果有就直接加进去
                    List<Map<String, Object>> dictList = dictMaps.get(code);
                    Map<String, Object> dictMap = new HashMap<>();
                    dictMap.put(dict.getType().toString(), dict.getContent());
                    dictList.add(dictMap);
                    dictMaps.put(code,dictList);
                }
            }
        }
    
        //获取下拉列表
        public List<Map<String, Object>> getMapList(String code){
            return dictMaps.get(code);
        }
    
        //获取字典值
        public static String getValue(String code,String type){
            List<Map<String, Object>> maps = dictMaps.get(code);
            for (Map<String, Object>  map: maps) {
                if(map.get(type) != null){
                    return map.get(type).toString();
                }
            }
            return null;
        }
    }

`3。其它`

@Getter@Setter //此处用的lombok
    public class Dict implements Serializable{
    
        public static final Boolean NOT_ENABLED = false;
        public static final Boolean IS_ENABLED = true;
    
        private Long dictId;
    
        private String code;//字典码
    
        private Long type;//类型
    
        private String content;//内容
    
        private Long sort;//排序
    
        private Boolean isEnabled;//启用状态:0未启用,1启用
    }

@Service
    public interface DictService {
    
       public List<Dict> selectAllEnabled();
    }

@Service
    public class DictServiceImpl implements DictService {
    
        @Autowired
        private DictMapper dictMapper;
    
        /**
         * 查看所有启用的字典
         */
        public List<Dict> selectAllEnabled(){
            return dictMapper.selectAllEnabled();
        }
    }
    
    @Component
    public interface DictMapper {
    
        List<Dict> selectAllEnabled();
    }

<?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
    <mapper namespace="com.alialiso.MyDemo.order.mapper.DictMapper">
    
        <resultMap id="BaseResultMap" type="com.alialiso.MyDemo.order.domain.Dict">
            <id column="dict_id" property="dictId"/>
            <result column="code" property="code"/>
            <result column="type" property="type"/>
            <result column="content" property="content"/>
            <result column="sort" property="sort"/>
            <result column="is_enabled" property="isEnabled"/>
        </resultMap>
    
        <select id="selectAllEnabled" resultMap="BaseResultMap">
            SELECT
               `dict_id`,
               `code`,
               `type`,
               `content`,
               `sort`,
               `is_enabled`
            from
               `bas_dict`
            where
            is_enabled = true
        </select>
    </mapper>

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