Spring 学习（十四）——泛型依赖注入

•Spring 4.x 中可以为子类注入子类对应的泛型类型的成员变量的引用

整合多个配置文件

•Spring 允许通过 <import> 将多个配置文件引入到一个文件中，进行配置文件的集成。这样在启动 Spring 容器时，仅需要指定这个合并好的配置文件就可以。

•import 元素的 resource 属性支持 Spring 的标准的路径资源

代码：

BaseRepository.java

package com.hzyc.spring.bean.generic.di;

/**
 * @author xuehj2016
 * @Title: BaseRepository
 * @ProjectName Spring
 * @Description: TODO
 * @date 2018/12/19 0:23
 */
public class BaseRepository <T> {
}

BaseService.java

package com.hzyc.spring.bean.generic.di;

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

/**
 * @author xuehj2016
 * @Title: BaseService
 * @ProjectName Spring
 * @Description: TODO
 * @date 2018/12/19 0:24
 */
public class BaseService<T> {
    @Autowired
    protected BaseRepository<T> repository;

    public void add() {
        System.out.println("add...");
        System.out.println("repository");
    }
}

UserRepository.java

package com.hzyc.spring.bean.generic.di;

import org.springframework.stereotype.Repository;

/**
 * @author xuehj2016
 * @Title: UserRepository
 * @ProjectName Spring
 * @Description: TODO
 * @date 2018/12/19 0:27
 */
@Repository
public class UserRepository extends BaseRepository<User> {
}

UserService .java

package com.hzyc.spring.bean.generic.di;

import org.springframework.stereotype.Service;

/**
 * @author xuehj2016
 * @Title: UserService
 * @ProjectName Spring
 * @Description: TODO
 * @date 2018/12/19 0:26
 */
@Service
public class UserService extends BaseService<User> {
}

user.java

package com.hzyc.spring.bean.generic.di;

/**
 * @author xuehj2016
 * @Title: User
 * @ProjectName Spring
 * @Description: TODO
 * @date 2018/12/19 0:27
 */
public class User {
}

Main.java

package com.hzyc.spring.bean.generic.di;

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

/**
 * @author xuehj2016
 * @Title: Main
 * @ProjectName Spring
 * @Description: TODO
 * @date 2018/12/19 0:30
 */
public class Main {
    public static void main(String[] args) {
        ApplicationContext applicationContext = new ClassPathXmlApplicationContext("bean-generic-di.xml");

        UserService userService= (UserService) applicationContext.getBean("userService");
        System.out.println(userService);
        userService.add();
    }
}

bean-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.xsd">

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

</beans>

Spring 学习（十四）——泛型依赖注入

猜你喜欢