如题，明天来跟新……，怕自己忘了做做笔记，感觉这个在开发中比较有价值和实际应用

在父类或者是接口中定义好以有的关系，各自的子类继承这种关系，以一个简单的例子来说明：

首先建立目录如下：

可以比较清楚看建立的层次目录建立的各个文件及之间的关系，下面我们来看看类的内容：

User.java

package com.tianjun.h.entity;

public class User {

}

package com.tianjun.h.repository;

public class BaseRespository<T> {

	
}

package com.tianjun.h.repository.impl;

import org.springframework.stereotype.Repository;

import com.tianjun.h.entity.User;
import com.tianjun.h.repository.BaseRespository;

@Repository
public class UserRepositoryImpl extends BaseRespository<User>{

}

package com.tianjun.h.service;

import org.springframework.beans.factory.annotation.Autowired;


import com.tianjun.h.repository.BaseRespository;


public class BaseService<T> {

	@Autowired
	private BaseRespository<T> baseRespositroy;
	
	public void add(){
		System.out.println("nihao,wohao !dajiahao!");
		System.out.println(baseRespositroy);
	}
}

package com.tianjun.h.service.Impl;

import org.springframework.stereotype.Service;

import com.tianjun.h.entity.User;
import com.tianjun.h.service.BaseService;

@Service("userService")
public class UserServieImpl extends BaseService<User> {

	
	
}

package com.tianjun.h;

import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.tianjun.h.service.BaseService;

public class test{
	@Test
	public static void main(String[] args){
		String path = "D:\\tianWorkPlace\\h\\beans.xml";
		ApplicationContext atx = new ClassPathXmlApplicationContext("beans.xml");
		BaseService userServie = (BaseService) atx.getBean("userService");
		userServie.add();
		
	}
}

<context:component-scan base-package="com.tianjun.h"></context:component-scan>