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.*;
@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
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