spring 泛型依赖注入

泛型依赖注入不是很懂，参考链接
http://www.tuicool.com/articles/bIRfUv
1.

package com.hxzy.generic.di;

public class BaseRepository<T> {

}

2.

package com.hxzy.generic.di;

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

public class BaseService<T> {

//此处加注解,使得T中注入User类的bean?不懂

@Autowired

protected BaseRepository<T> repository;

public void add() {

System.out.println("add");

System.out.println(repository);

}

}

3.

package com.hxzy.generic.di;

import org.springframework.stereotype.Repository;

@Repository

public class UserRepository extends BaseRepository<User>{

}

4.

package com.hxzy.generic.di;

import org.springframework.stereotype.Service;

@Service

public class UserService extends BaseService<User>{

}

5.

package com.hxzy.generic.di;

public class User {

}

6.配置文件

<?xml version="1.0" encoding="UTF-8"?>

<beans xmlns="http://www.springframework.org/schema/beans"

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:context="http://www.springframework.org/schema/context"

xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">

<context:component-scan base-package="com.hxzy.generic.di"></context:component-scan>

</beans>

7.测试文件

package com.hxzy.generic.di;

import org.springframework.context.support.ClassPathXmlApplicationContext;

public class TestMain {

public static void main(String[] args) {

ClassPathXmlApplicationContext ctx = new ClassPathXmlApplicationContext("generic.xml");

UserService userService = (UserService) ctx.getBean("userService");

System.out.println(userService);

userService.add();

}

}