在考試前匆匆看了一遍Spring in Action 也沒有記錄什么,考試結束了,要抓緊時間整理一下.要不然就忘了.^_^:
整理一下我目前可能會用到的模塊, 對于那些現在根本用不到的冬冬還是等有時間再研究吧!
第一個當然是最經典的HelloWorld 了 , 呵呵,簡單,但是說明了原理.
定義一個服務接口
package?
test.helloworld;
public?interface?
GreetingService?{
??
public?void?
sayGreeting();
}
下面是其實現:
package?
test.helloworld;
public?class?
GreetingServiceImpl?
implements?
GreetingService?{
??
private?
String?greeting;
??
public?
GreetingServiceImpl()?{}
??
public?
GreetingServiceImpl(String?greeting)?{
????
this
.greeting?=?greeting;
??
}
??
public?void?
sayGreeting()?{
????
//??Auto-generated?method?stub
????
System.out.println(greeting);
??
}
??
??
public?void?
setGreeting(String?greeting)?{
????
this
.greeting?=?greeting;
??
}
}
然后就是測試 IoC 的測試代碼:
package?
test.helloworld;
import?
org.springframework.beans.factory.BeanFactory;
import?
org.springframework.beans.factory.xml.XmlBeanFactory;
import?
org.springframework.context.ApplicationContext;
import?
org.springframework.context.support.ClassPathXmlApplicationContext;
import?
org.springframework.core.io.FileSystemResource;
public?class?
HelloApp?{
??
/**
???
*?
@param?
args
???
*/
??
public?static?void?
main(String[]?args)?{
????
//?TODO?Auto-generated?method?stub
//????BeanFactory?factory;
//????factory?=?new?XmlBeanFactory(new?FileSystemResource("src/test/helloworld/hello.xml"));
????
//?使用不同的方法得到bean.?(BeanFactory?or?ApplicationContext)
????
ApplicationContext?context?=?
new?
ClassPathXmlApplicationContext(
"test/helloworld/hello.xml"
);
????
????
????
GreetingService?greetingService?=?(GreetingService)?context.getBean(
"greetingService"
);
//????GreetingService?greetingService?=?(GreetingService)?factory.getBean("greetingService");
????
greetingService.sayGreeting();
??
}
}
還有重要的配置文件如下:hello.xml
<?
xml
version
=
"1.0"
encoding
=
"UTF-8"
?><!
DOCTYPE
beans
PUBLIC
"-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd"
>
<
beans
>
<
bean
id
=
"greetingService"
class
=
"test.helloworld.GreetingServiceImpl"
>
<
property
name
=
"greeting"
>
<
value
>
ice rain !
</
value
>
</
property
>
</
bean
></
beans
>
呵呵就這么簡單,實現了 greeting 屬性的 Ioc.
這是Spring 兩大基本支柱其一的工作原理, 關于AoP的內容,在這里不作討論,因為現在我使用AoP的地方不是很多,簡單的應用是很簡單的啦.^_^.
下面一篇我們來看看 在spring包裝下的jdbc訪問. 詳細情況也可以參考這里