减少Dao代码的实现方式一

/* * 父类 */public class parent(){private String str;public void setStr(String str){str = str;}public String getStr(){return str;}}/* * 子类A */public class subA extends parent{private String str1;public void setStr1(String str1){str1 = str1;}public String getStr1(){return str1;}}/* * 子类B */public class subB extends parent{private String str2;public void setStr2(String str2){str2 = str2;}public String getStr2(){return str2;}}/** * 无论是保存对象subA、还是subB * 实现构造 * List<subA>/List<subB>对象传入就可以了 */Public void bulkSave(List<? extends BaseEntity> saveEntities){dao.bulkSave(saveEntities);}