在java应用程序中使用spring

1、创建bean

package Test201307;

public class MessageBean {
private String message;

public String getMessage() {
return message;
}

public void setMessage(String message) {
this.message = message;
}
}

2、创建spring配置文件

Spring framework application test!

3、测试类

package Test201307;

import java.net.URL;

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.ClassPathResource;

public class SpringTest {

/**
 * @param args
 */
public static void main(String[] args) {
//String path = System.getProperty("user.dir");
//System.out.println("path:"+path);
//System.out.println("path:"+SpringTest.class.getClassLoader().getResource(""));
//System.out.println("path:"+SpringTest.class.getResource(""));
//System.out.println("path:"+SpringTest.class.getResource("/"));
//System.out.println("path:"+ClassLoader.getSystemResource(""));
//System.out.println("path:"+Thread.currentThread().getContextClassLoader().getResource(""));
URL urlAb = SpringTest.class.getResource("");
URL urlSt = SpringTest.class.getResource("/");
String path = urlAb.toString().replace(urlSt.toString(), "");

System.out.println("path->"+path);
// 创建ClassPathResource对象，类加载器将在classpath中查找beans-config.xml文件.
ClassPathResource resource = new ClassPathResource(path+"beans-config.xml");

/*spring 根据beans-config.xml文件中的配置信息创建BeanFactory的实例，
     同时完成bean的创建和属性值得注入。*/
BeanFactory beanFactory = new XmlBeanFactory(resource);

// getBean() 取得bean实例
MessageBean bean = (MessageBean)beanFactory.getBean("messageBean");//从配置文件中
System.out.println(bean.getMessage());

/* sping 容器有两个接口：BeanFactory和ApplicatoinContext,都被称为：spring上下文
 ,它们都是bean的工厂。但是，ApplicatoinContext是BeanFactory的子接口，提供了更多
 的功能。
 */
//方式2
ApplicationContext ac = new ClassPathXmlApplicationContext(path+"beans-config.xml");
MessageBean messageBean_2 = (MessageBean)ac.getBean("messageBean");
System.out.println(messageBean_2.getMessage());
}

}