spring IoC编程实例

配置文件

/SpringHelloWorld/src/applicationContext.xml

代码  
 
<?xml version="1.0" encoding="UTF-8"?> 
<beans 
    xmlns="http://www.springframework.org/schema/beans" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd"> 
      
    <bean id="greetingService" class="com.qdu.sun.spring.HelloWorld"> 
        <constructor-arg> 
            <value type="java.lang.String">Welcome!</value> 
        </constructor-arg> 
    </bean></beans> 

SpringTest.java

代码  
 
package com.qdu.sun.spring;  
 
import org.springframework.beans.factory.BeanFactory;  
import org.springframework.beans.factory.xml.XmlBeanFactory;  
import org.springframework.core.io.ClassPathResource;  
 
public class SpringTest {  
     public static void main( String[] args ){  
            BeanFactory factory = new XmlBeanFactory( new ClassPathResource("applicationContext.xml") );  
            HelloWorld gc = (HelloWorld)factory.getBean("greetingService");  
            gc.sayGreeting();  
        }  
} 

HelloWorld.java

代码  
 
package com.qdu.sun.spring;  
 
public class HelloWorld {  
private String greeting;  
      
    public HelloWorld(){  
          
    }  
      
    public HelloWorld( String greeting ){  
        this.greeting = greeting;  
    }  
      
    public void sayGreeting(){  
        System.out.println( greeting );  
    }  
      
    public void setGreeting( String greeting ){  
        this.greeting = greeting;  
    }  
 
}