Spring课程 Spring入门篇 3-5 Spring bean装配（上）之Resource

课程链接:

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