spring07

Posted 2021-03-02 悄悄成长

关于spring的泛型依赖注入主要是继承等方面的知识

具体实现的简单的代码如下：

package bao1;

public class BaseRepository <T>{

}

package bao1;

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

public class BaseService<T> {
    //这样写注解的话会被子类继承
    @Autowired
    protected BaseRepository<T> repository;
    public void add()
    {
        System.out.println("add>>>>>>>>>");
        System.out.println(repository);
    }

}

package bao1;

import org.springframework.stereotype.Service;

@Service
public class UserSrevice  extends BaseService<User> {

}

package bao1;

public class User {

}

package bao1;

import org.springframework.stereotype.Repository;
//交个ioc容器管理
@Repository
public class UserRepository extends BaseRepository<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-4.3.xsd">
<context:component-scan base-package="bao1"></context:component-scan>

</beans>

package bao1;

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

public class Spring {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
ApplicationContext ct=new ClassPathXmlApplicationContext("bean-06.xml");
UserSrevice userSrevice= (UserSrevice) ct.getBean("userSrevice");
userSrevice.add();
    }

}