Spring 4.x 新特性：泛型依賴注入

 Spring 允許通過<import> 将多個配置檔案引入到一個檔案中，進行配置檔案的內建。這樣在啟動 Spring 容器時，僅需要指定這個合并好的配置檔案就可以。

import 元素的 resource屬性支援 Spring 的标準的路徑資源

Main

package com.spring.beans.generic.di;

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

public class Main {

	public static void main(String[] args) {
		ApplicationContext ac = new ClassPathXmlApplicationContext("beans-generic-di.xml");
		UserService ur = (UserService) ac.getBean("userService");
		ur.add();
	}

}
/*
add
[email protected]
*/
           

beans-generic-di.xml

<?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-4.3.xsd">
	
	<context:component-scan base-package="com.spring.beans.generic.di">
	</context:component-scan>
	
</beans>
           

BaseService<T>

package com.spring.beans.generic.di;

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

public class BaseService<T> {
	@Autowired
	 private BaseRepository<T> repository;
	 public void add() {
		 System.out.println("add");
		 System.out.println(repository);
	 }
}
           

UserService

package com.spring.beans.generic.di;

import org.springframework.stereotype.Service;

@Service
public class UserService extends BaseService<User>{
	
}
           

BaseRepository<T>

package com.spring.beans.generic.di;

public class BaseRepository<T> {

}
           

UserRepository

package com.spring.beans.generic.di;

import org.springframework.stereotype.Repository;

@Repository
public class UserRepository extends BaseRepository<User>{
	
}
           

User

package com.spring.beans.generic.di;

public class User {

}