enum固定级联

https://www.jianshu.com/p/d136c3d30c91

// 从RENSHISONENUM中获取parent为RENSHIENUM的code的数据
public static Map<String, String> getSonByParent(String parent) {
Map<String, String> map = new HashMap<>();
for (RENSHISONENUM picklistenum : RENSHISONENUM.values()) {
if (picklistenum.getParent().equals(parent)) {
map.put(picklistenum.getCode(), picklistenum.getName());
}
}
return map;
}