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.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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