几种加载Spring的配置文件的模式

几种加载Spring的配置文件的方式

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" encoding="GBK"?><!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans> <bean id="beanFile" encoding="GBK"?><!DOCTYPE beans PUBLIC "-//SPRING/DTD BEAN/EN" "http://www.springframework.org/dtd/spring-beans.dtd"><beans> <bean id="beanFile" 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.BeanFile??beanFile.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

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