package com.liu.test;public class BeanFile { private String beanFile = "多种方式加载Bean的配置文件"; public void setBeanFile(String beanFile) { this.beanFile = beanFile; } public String getBeanFile() { return beanFile; }}package com.liu.test;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.InputStream;import org.springframework.beans.factory.BeanFactory;import org.springframework.beans.factory.support.BeanDefinitionRegistry;import org.springframework.beans.factory.support.DefaultListableBeanFactory;import org.springframework.beans.factory.support.PropertiesBeanDefinitionReader;import org.springframework.beans.factory.xml.XmlBeanFactory;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;import org.springframework.core.io.ClassPathResource;import org.springframework.core.io.FileSystemResource;import org.springframework.core.io.InputStreamResource;import org.springframework.core.io.Resource;public class MainBeanFile { public static void main(String[] args) { // 直接调用HelloBean BeanFile bf = new BeanFile(); System.out.println(bf.getBeanFile()); /** * 利用XmlBeanFactory(Resource resource) 这里Resource必须是xml格式 * Resource包括：AbstractResource, ClassPathResource, FileSystemResource, * InputStreamResource, ServletContextResource, UrlResource */ /* * 利用 InputStreamResource(InputStream inputStream) 要将bean.xml放在项目根目录下，目录一定要写完整 */ InputStream is = null; try { is = new FileInputStream("c:/workspace/spring/WebRoot/WEB-INF/InputStreamResource.xml"); } catch (FileNotFoundException e) { e.printStackTrace(); } Resource resource = new InputStreamResource(is); sayHello(resource); /* * 利用 ClassPathResource(String path) 要将bean.xml放在源文件夹（src）目录下 */ resource = new ClassPathResource("ClassPathResource.xml"); sayHello(resource); /* * 利用 FileSystemResource(String path) 要将bean.xml放在项目根目录下,目录一定要写完整 * c:/workspace/spring/src/com/liu/test/FileSystemResource.xml */ resource = new FileSystemResource("c:/workspace/spring/src/com/liu/test/FileSystemResource.xml"); sayHello(resource); /* * 利用 Properties 要将bean.properties放在类路径－－源文件夹（src）目录下 */ BeanDefinitionRegistry reg = new DefaultListableBeanFactory(); PropertiesBeanDefinitionReader reader = new PropertiesBeanDefinitionReader(reg); reader.loadBeanDefinitions(new ClassPathResource("bean.properties")); BeanFactory factory = (BeanFactory) reg; bf = (BeanFile) factory.getBean("beanFile"); System.out.println("利用" + bf.getBeanFile() + " 加载 Bean.properties"); /* * 利用 ApplicationContext 要将bean.xml放在类路径－－源文件夹（src）目录下 */ ApplicationContext appContext = new ClassPathXmlApplicationContext( "/ApplicationContext.xml"); bf = (BeanFile) appContext.getBean("beanFile"); System.out.println("利用" + bf.getBeanFile() + " 加载 Bean.xml"); } public static void sayHello(Resource resource) { BeanFactory factory = new XmlBeanFactory(resource); BeanFile bf = (BeanFile) factory.getBean("beanFile"); System.out.println("利用 " + bf.getBeanFile() + " 加载 Bean.xml"); }}
InputStreamResource.xml<?xml version="1.0" encoding="GBK"?><!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans> <bean id="beanFile" class="com.liu.test.BeanFile"> <property name="beanFile"> <value>InputStreamResource(InputStream inputStream)</value> </property> </bean></beans>
ClassPathResource.xml<?xml version="1.0" encoding="GBK"?><!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans> <bean id="beanFile" class="com.liu.test.BeanFile"> <property name="beanFile"> <value>ClassPathResource(String path)</value> </property> </bean></beans>
FileSystemResource.xml
<?xml version="1.0" encoding="GBK"?><!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans> <bean id="beanFile" class="com.liu.test.BeanFile"> <property name="beanFile"> <value>FileSystemResource(String path)</value> </property> </bean></beans>
ApplicationContext.xml<?xml version="1.0" encoding="GBK"?><!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN" "http://www.springframework.org/dtd/spring-beans.dtd">
<beans> <bean id="beanFile" class="com.liu.test.BeanFile"> <property name="beanFile"> <value>ApplicationContext</value> </property> </bean></beans>
bean.properties（Spring也可以使用属性文件来定义配置文件，bean.properties放在源文件夹（src）目录下）beanFile.class=com.liu.test.BeanFilebeanFile.beanFile=properties
输出结果：（也跟log4j的配置文件有关）多种方式加载Bean的配置文件利用 InputStreamResource(InputStream inputStream) 加载 Bean.xml利用 ClassPathResource(String path) 加载 Bean.xml利用 FileSystemResource(String path) 加载 Bean.xml 利用properties 加载 Bean.properties利用ApplicationContext 加载 Bean.xml
