Spring学习笔记十二---泛型依赖注入

package generic_di;

import org.springframework.stereotype.Repository;

@Repository
public class BaseRepository<T> {
    public void save() {
        System.out.println("Repository save ...");
    }
}

package generic_di;

import org.springframework.stereotype.Repository;

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

package generic_di;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.stereotype.Service;

@Service
public class BaseService<T> {

    @Autowired
    protected BaseRepository<T> baseRepository;

    public void add() {
        System.out.println("Service add ...");
        System.out.println(baseRepository);

    }
}

package generic_di;

import org.springframework.stereotype.Service;

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

<?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.xsd">

    <context:component-scan base-package="generic_di"></context:component-scan>
</beans>

package generic_di;


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

public class Main {
    public static void main(String[] args) {
        ApplicationContext ctx = new ClassPathXmlApplicationContext("generic_di//application.xml");
        UserService userService = (UserService) ctx.getBean("userService");
        userService.add();
    }
}