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);
	}