Java如何将文件转换为URL

在这篇文章中，将演示如何将java.io.File转换为java.net.URL，反之亦然。

以下示例演示了将File转换为URL。文件：FileToUrlExample.java –

package com.yiibai.tutorial.io;  import java.io.File; import java.net.MalformedURLException; import java.net.URI; import java.net.URL;  /**  * @author yiibai  */ public class FileToUrlExample {     public static void main(String[] args) {         File file = new File("C:/Program Files/Java/jdk1.8.0_71/COPYRIGHT");         if (file.exists()) {             System.out.println("PATH: " + file.getPath());              // Convert file to URI             URI uri = file.toURI();             System.out.println("URI: " + uri.toString());              // Convert URI to URL             URL url;             try {                 url = uri.toURL();                 System.out.println("URL: " + url.toString());             } catch (MalformedURLException e) {                 e.printStackTrace();             }          }     } } 

执行上面代码，得到以下结果：

PATH: C:/Program Files/Java/jdk1.8.0_71/COPYRIGHT URI: file:/C:/Program%20Files/Java/jdk1.8.0_71/COPYRIGHT URL: file:/C:/Program%20Files/Java/jdk1.8.0_71/COPYRIGHT 

以下示例演示了将URL转换为File。

文件：UrlToFileExample.java –

package com.yiibai.tutorial.io;  import java.io.File; import java.net.MalformedURLException; import java.net.URI; import java.net.URISyntaxException; import java.net.URL;  /**  * @author yiibai  */ public class UrlToFileExample {     public static void main(String[] args) {         try {             URL url=new URL("file:/C:/Program%20Files/Java/jdk1.8.0_71/COPYRIGHT");             System.out.println("URL: "+url.toString());              //Convert URL to URI             URI uri=url.toURI();             System.out.println("URI: "+uri.toString());              //Convert URI to File             File file=new File(uri.getPath());             System.out.println("PATH: "+file.getAbsolutePath());          } catch (MalformedURLException | URISyntaxException e) {             e.printStackTrace();         }     } } 

执行上面示例代码，得到以下结果：

URL: file:/C:/Program%20Files/Java/jdk1.8.0_71/COPYRIGHT URI: file:/C:/Program%20Files/Java/jdk1.8.0_71/COPYRIGHT PATH: C:/Program Files/Java/jdk1.8.0_71/COPYRIGHT `