【Spring】13 泛型依赖注入

泛型依赖注入

泛型依赖注入

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BaseRepository.java(com.test.sping.beans.generic.di.BaseRepository）

package com.test.sping.beans.generic.di;

public class BaseRepository<T> {
}

BaseService.java(com.test.sping.beans.generic.di.BaseService)

package com.test.sping.beans.generic.di;

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

public class BaseService<T> {

    @Autowired
    protected BaseRepository<T> repository;

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

User.java(com.test.sping.beans.generic.di.User)

package com.test.sping.beans.generic.di;

public class User  {
}

UserRepository.java(com.test.sping.beans.generic.di.UserRepository)

package com.test.sping.beans.generic.di;

import org.springframework.stereotype.Repository;

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

UserService.java(com.test.sping.beans.generic.di.UserService)

package com.test.sping.beans.generic.di;

import org.springframework.stereotype.Service;

@Service
public class UserService extends BaseService<User> {

}

beans-generic-di.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans>
    <context:component-scan base-package="com.test.sping.beans.generic.di"></context:component-scan>
</beans>

Main.java(com.test.sping.beans.generic.di.Main)

package com.test.sping.beans.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("beans-generic-di.xml");

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

运行结果

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posted @ 2019-03-20 14:21  ZMemory  阅读(57)  评论(0)    收藏  举报