Spring实战中@Autowire注解具体应用方法详细解析是怎样的？

本文共计802个文字，预计阅读时间需要4分钟。

本例讲解Spring实战中@Autowire注解的使用方法。以下为配置示例：

xml

本文实例讲述了Spring实战之@Autowire注解用法。分享给大家供大家参考，具体如下：

一 配置

<?xml version="1.0" encoding="GBK"?> <beans xmlns="www.springframework.org/schema/beans" xmlns:xsi="www.w3.org/2001/XMLSchema-instance" xmlns:context="www.springframework.org/schema/context" xsi:schemaLocation="www.springframework.org/schema/beans www.springframework.org/schema/beans/spring-beans-4.0.xsd www.springframework.org/schema/context www.springframework.org/schema/context/spring-context-4.0.xsd"> <context:component-scan base-package="org.crazyit.app.service,org.crazyit.app.dao"/> </beans>

二 dao接口

BaseDao

package org.crazyit.app.dao; public interface BaseDao<T> { void save(T e); }

ItemDao

package org.crazyit.app.dao; import org.crazyit.app.domain.*; public interface ItemDao extends BaseDao<Item> { }

UserDao

package org.crazyit.app.dao; import org.crazyit.app.domain.*; public interface UserDao extends BaseDao<User> { }

三 dao实现类

BaseDaoImpl

package org.crazyit.app.dao.impl; import org.crazyit.app.dao.*; public class BaseDaoImpl<T> implements BaseDao<T> { public void save(T e) { System.out.println("程序保存对象：" + e); } }

ItemDaoImpl

package org.crazyit.app.dao.impl; import org.springframework.stereotype.*; import org.crazyit.app.dao.*; import org.crazyit.app.domain.*; @Component("itemDao") public class ItemDaoImpl extends BaseDaoImpl<Item> implements ItemDao { }

UserDaoImpl

package org.crazyit.app.dao.impl; import org.springframework.stereotype.*; import org.crazyit.app.dao.*; import org.crazyit.app.domain.*; @Component("userDao") public class UserDaoImpl extends BaseDaoImpl<User> implements UserDao { }

四 Bean

Item

package org.crazyit.app.domain; public class Item { }

User

package org.crazyit.app.domain; public class User { }

五 service接口

BaseService

package org.crazyit.app.service; import org.springframework.stereotype.*; import org.springframework.beans.factory.annotation.*; import org.crazyit.app.service.*; public interface BaseService<T> { void addEntity(T entity); }

ItemService

package org.crazyit.app.service; import org.springframework.stereotype.*; import org.springframework.beans.factory.annotation.*; import org.crazyit.app.service.*; import org.crazyit.app.domain.*; @Component public interface ItemService extends BaseService<Item> { }

UserService

package org.crazyit.app.service; import org.springframework.stereotype.*; import org.springframework.beans.factory.annotation.*; import org.crazyit.app.service.*; import org.crazyit.app.domain.*; @Component public interface UserService extends BaseService<User> { }

六 Service实现类

BaseServiceImpl

package org.crazyit.app.service.impl; import org.springframework.stereotype.*; import org.springframework.beans.factory.annotation.*; import org.crazyit.app.dao.*; import org.crazyit.app.service.*; public class BaseServiceImpl<T> implements BaseService<T> { @Autowired private BaseDao<T> dao; public void addEntity(T entity) { System.out.println("调用" + dao + "保存实体：" + entity); } }

ItemServiceImpl

package org.crazyit.app.service.impl; import org.springframework.stereotype.*; import org.springframework.beans.factory.annotation.*; import org.crazyit.app.service.*; import org.crazyit.app.domain.*; @Component("itemService") public class ItemServiceImpl extends BaseServiceImpl<Item> implements ItemService { }

UserServiceImpl

package org.crazyit.app.service.impl; import org.springframework.stereotype.*; import org.springframework.beans.factory.annotation.*; import org.crazyit.app.service.*; import org.crazyit.app.domain.*; @Component("userService") public class UserServiceImpl extends BaseServiceImpl<User> implements UserService { }

七 测试类

package lee; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import org.crazyit.app.service.*; import org.crazyit.app.domain.*; public class BeanTest { public static void main(String[] args)throws Exception { // 创建Spring容器 ApplicationContext ctx = new ClassPathXmlApplicationContext("beans.xml"); UserService us = ctx.getBean("userService", UserService.class); us.addEntity(new User()); ItemService is = ctx.getBean("itemService", ItemService.class); is.addEntity(new Item()); } }

八 测试

调用org.crazyit.app.dao.impl.UserDaoImpl@b7dd107保存实体：org.crazyit.app.domain.User@42eca56e调用org.crazyit.app.dao.impl.ItemDaoImpl@52f759d7保存实体：org.crazyit.app.domain.Item@7cbd213e

更多关于java相关内容感兴趣的读者可查看本站专题：《Spring框架入门与进阶教程》、《Java数据结构与算法教程》、《Java操作DOM节点技巧总结》、《Java文件与目录操作技巧汇总》和《Java缓存操作技巧汇总》

希望本文所述对大家java程序设计有所帮助。