Spring课程 Spring入门篇 3-5 Spring bean装配(上)之Resource
2024-08-27 04:40:51
1 resource简析
2 resource代码演练
1 resource简析
urlsource:url对应的资源
classpath:获取类路径下的资源文件
filesystemresource:获取文件系统里面的资源
servletContextResource:servlet封装的资源
inputStreamResource:输入流封装的资源
ByteArrayResource:字节数组封装的资源
2 resource代码演练(可以配置在右键项目==》build path==》source==》add folder==》将加载文件config.txt加载进去即可)
2.1 classpath:
实体类:
package com.imooc.resource; import java.io.IOException; import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.core.io.Resource; public class MoocResource implements ApplicationContextAware{ private ApplicationContext applicationContext; @Override
public void setApplicationContext(ApplicationContext aContext)
throws BeansException {
// TODO Auto-generated method stub
this.applicationContext = aContext;
} public void resource(){
try {
Resource resource = applicationContext.getResource("classpath:config.txt");
System.out.println("fileName is "+resource.getFilename());
System.out.println("resource's length is "+resource.contentLength());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} }
配置文件:
<?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.xsd"> <bean id="moocResource" class="com.imooc.resource.MoocResource"></bean> </beans>
测试类:
package com.imooc.resource; import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.BlockJUnit4ClassRunner; import com.imooc.test.base.UnitTestBase; @RunWith(BlockJUnit4ClassRunner.class)
public class TestResource extends UnitTestBase{ public TestResource() {
super("classpath:spring-resource.xml");
} @Test
public void testMoocResource(){
try {
MoocResource mResource = super.getbean("moocResource");
mResource.resource();
} catch (Exception e) {
// TODO: handle exception
}
} }
打印结果:
三月 04, 2019 9:36:41 下午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@6e038230: startup date [Mon Mar 04 21:36:41 CST 2019]; root of context hierarchy
三月 04, 2019 9:36:41 下午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [spring-resource.xml]
fileName is config.txt
resource's length is 9
三月 04, 2019 9:36:41 下午 org.springframework.context.support.ClassPathXmlApplicationContext doClose
信息: Closing org.springframework.context.support.ClassPathXmlApplicationContext@6e038230: startup date [Mon Mar 04 21:36:41 CST 2019]; root of context hierarchy
config.txt:
123456789
2.2 file的形式(除实体类不一样之外,其他的完全一致)
实体类:
package com.imooc.resource; import java.io.IOException; import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.core.io.Resource; public class MoocResource implements ApplicationContextAware{ private ApplicationContext applicationContext; @Override
public void setApplicationContext(ApplicationContext aContext)
throws BeansException {
// TODO Auto-generated method stub
this.applicationContext = aContext;
} public void resource(){
try {
// Resource resource = applicationContext.getResource("classpath:config.txt");
Resource resource = applicationContext.getResource("file:F:\\xiangmu3\\Xin\\FuQiang\\Spring\\ddwei-dao\\src\\main\\java\\config.txt");
System.out.println("fileName is "+resource.getFilename());
System.out.println("resource's length is "+resource.contentLength());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} }
打印结果:
三月 05, 2019 6:36:15 上午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@14bb39a3: startup date [Tue Mar 05 06:36:15 CST 2019]; root of context hierarchy
三月 05, 2019 6:36:15 上午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [spring-resource.xml]
fileName is config.txt
三月 05, 2019 6:36:15 上午 org.springframework.context.support.ClassPathXmlApplicationContext doClose
信息: Closing org.springframework.context.support.ClassPathXmlApplicationContext@14bb39a3: startup date [Tue Mar 05 06:36:15 CST 2019]; root of context hierarchy
resource's length is 9
2.3 url的形式
实体类:
package com.imooc.resource; import java.io.IOException; import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.core.io.Resource; public class MoocResource implements ApplicationContextAware{ private ApplicationContext applicationContext; @Override
public void setApplicationContext(ApplicationContext aContext)
throws BeansException {
// TODO Auto-generated method stub
this.applicationContext = aContext;
} public void resource(){
try {
// Resource resource = applicationContext.getResource("classpath:config.txt");
// Resource resource = applicationContext.getResource("file:F:\\xiangmu3\\Xin\\FuQiang\\Spring\\ddwei-dao\\src\\main\\java\\config.txt");
Resource resource = applicationContext.getResource("url:https://www.kanzhun.com/gsr856943.html");
System.out.println("fileName is "+resource.getFilename());
System.out.println("resource's length is "+resource.contentLength());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} }
打印结果:
三月 05, 2019 6:45:23 上午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@fc506f7: startup date [Tue Mar 05 06:45:23 CST 2019]; root of context hierarchy
三月 05, 2019 6:45:23 上午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [spring-resource.xml]
fileName is gsr856943.html
resource's length is 9863
三月 05, 2019 6:45:25 上午 org.springframework.context.support.ClassPathXmlApplicationContext doClose
信息: Closing org.springframework.context.support.ClassPathXmlApplicationContext@fc506f7: startup date [Tue Mar 05 06:45:23 CST 2019]; root of context hierarchy
2.4 no的形式(除实体类不一样之外,其他的完全一致)
实体类:
package com.imooc.resource; import java.io.IOException; import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.core.io.Resource; public class MoocResource implements ApplicationContextAware{ private ApplicationContext applicationContext; @Override
public void setApplicationContext(ApplicationContext aContext)
throws BeansException {
// TODO Auto-generated method stub
this.applicationContext = aContext;
} public void resource(){
try {
// Resource resource = applicationContext.getResource("classpath:config.txt");
// Resource resource = applicationContext.getResource("file:F:\\xiangmu3\\Xin\\FuQiang\\Spring\\ddwei-dao\\src\\main\\java\\config.txt");
// Resource resource = applicationContext.getResource("url:https://www.kanzhun.com/gsr856943.html");
//当没有前缀的时候,依赖于applicationContext,而applicationContext依赖于classPath:*.xml创建(在UnitTestBase java类中创建,前方有概述,
//aware创建的applicationContext和UnitTestBase创建出来的applicationContext是同一个)
Resource resource = applicationContext.getResource("config.txt");
System.out.println("fileName is "+resource.getFilename());
System.out.println("resource's length is "+resource.contentLength());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} }
打印结果:
三月 05, 2019 6:49:10 上午 org.springframework.context.support.ClassPathXmlApplicationContext prepareRefresh
信息: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@14bb39a3: startup date [Tue Mar 05 06:49:10 CST 2019]; root of context hierarchy
三月 05, 2019 6:49:10 上午 org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [spring-resource.xml]
fileName is config.txt
三月 05, 2019 6:49:11 上午 org.springframework.context.support.ClassPathXmlApplicationContext doClose
信息: Closing org.springframework.context.support.ClassPathXmlApplicationContext@14bb39a3: startup date [Tue Mar 05 06:49:10 CST 2019]; root of context hierarchy
resource's length is 9
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