Spring实战之@Autowire注解用法详解

2023-08-03 21:27:04 73

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

二dao接口

BaseDao

packageorg.crazyit.app.dao;
publicinterfaceBaseDao
{
voidsave(Te);
}

ItemDao

packageorg.crazyit.app.dao;
importorg.crazyit.app.domain.*;
publicinterfaceItemDaoextendsBaseDao
{
}

UserDao

packageorg.crazyit.app.dao;
importorg.crazyit.app.domain.*;
publicinterfaceUserDaoextendsBaseDao
{
}

三dao实现类

BaseDaoImpl

packageorg.crazyit.app.dao.impl;
importorg.crazyit.app.dao.*;
publicclassBaseDaoImplimplementsBaseDao
{
publicvoidsave(Te)
{
System.out.println("程序保存对象："+e);
}
}

ItemDaoImpl

packageorg.crazyit.app.dao.impl;
importorg.springframework.stereotype.*;
importorg.crazyit.app.dao.*;
importorg.crazyit.app.domain.*;
@Component("itemDao")
publicclassItemDaoImplextendsBaseDaoImpl
implementsItemDao
{
}

UserDaoImpl

packageorg.crazyit.app.dao.impl;
importorg.springframework.stereotype.*;
importorg.crazyit.app.dao.*;
importorg.crazyit.app.domain.*;
@Component("userDao")
publicclassUserDaoImplextendsBaseDaoImpl
implementsUserDao
{
}

四Bean

Item

packageorg.crazyit.app.domain;
publicclassItem
{
}

User

packageorg.crazyit.app.domain;
publicclassUser
{
}

五service接口

BaseService

packageorg.crazyit.app.service;
importorg.springframework.stereotype.*;
importorg.springframework.beans.factory.annotation.*;
importorg.crazyit.app.service.*;
publicinterfaceBaseService
{
voidaddEntity(Tentity);
}

ItemService

packageorg.crazyit.app.service;
importorg.springframework.stereotype.*;
importorg.springframework.beans.factory.annotation.*;
importorg.crazyit.app.service.*;
importorg.crazyit.app.domain.*;
@Component
publicinterfaceItemServiceextendsBaseService
{
}

UserService

packageorg.crazyit.app.service;
importorg.springframework.stereotype.*;
importorg.springframework.beans.factory.annotation.*;
importorg.crazyit.app.service.*;
importorg.crazyit.app.domain.*;
@Component
publicinterfaceUserServiceextendsBaseService
{
}

六Service实现类

BaseServiceImpl

packageorg.crazyit.app.service.impl;
importorg.springframework.stereotype.*;
importorg.springframework.beans.factory.annotation.*;
importorg.crazyit.app.dao.*;
importorg.crazyit.app.service.*;
publicclassBaseServiceImplimplementsBaseService
{
@Autowired
privateBaseDaodao;
publicvoidaddEntity(Tentity)
{
System.out.println("调用"+dao
+"保存实体："+entity);
}
}

ItemServiceImpl

packageorg.crazyit.app.service.impl;
importorg.springframework.stereotype.*;
importorg.springframework.beans.factory.annotation.*;
importorg.crazyit.app.service.*;
importorg.crazyit.app.domain.*;
@Component("itemService")
publicclassItemServiceImplextendsBaseServiceImpl
implementsItemService
{
}

UserServiceImpl

packageorg.crazyit.app.service.impl;
importorg.springframework.stereotype.*;
importorg.springframework.beans.factory.annotation.*;
importorg.crazyit.app.service.*;
importorg.crazyit.app.domain.*;
@Component("userService")
publicclassUserServiceImplextendsBaseServiceImpl
implementsUserService
{
}

七测试类

packagelee;
importorg.springframework.context.ApplicationContext;
importorg.springframework.context.support.ClassPathXmlApplicationContext;
importorg.crazyit.app.service.*;
importorg.crazyit.app.domain.*;
publicclassBeanTest
{
publicstaticvoidmain(String[]args)throwsException
{
//创建Spring容器
ApplicationContextctx=new
ClassPathXmlApplicationContext("beans.xml");
UserServiceus=ctx.getBean("userService",UserService.class);
us.addEntity(newUser());
ItemServiceis=ctx.getBean("itemService",ItemService.class);
is.addEntity(newItem());
}
}

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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Spring实战之@Autowire注解用法详解

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