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="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-4.0.xsd http://www.springframework.org/schema/context http://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.*;@Componentpublic 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.*;@Componentpublic 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
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本文标题: Spring实战之@Autowire注解用法详解
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