How do I copy a URL into a file? - Learn Java by Examples

The code snippet below shows you how to use the FileUtils.copyURLToFile(URL, File) method of the Apache Commons IO library to help you to copy the contents of a URL directly into a file.

package org.kodejava.commons.io;

import org.apache.commons.io.FileUtils;

import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URL;

public class URLToFile {
    public static void main(String[] args) {
        try {
            URL url = URI.create("https://www.google.com").toURL();
            File destination = new File("google.html");

            // Copy bytes from the URL to the destination file.
            FileUtils.copyURLToFile(url, destination);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

Maven Dependencies

<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>2.16.1</version>
</dependency>

Author
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Wayan

Founder at Kode Java

A programmer, runner and recreational diver, lives on the island of Bali, Indonesia. Programming in Java, Spring Framework, Hibernate / JPA, MySQL. To support me working on this project, buy me a cup of coffee, every little bit helps. Thank you.

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6 Comments

I got a question: NetBeans tells me that the String "https://www.google.com" cannot be converted to an URL.

Wayan

April 7, 2016 at 2:14 pm

Can you show the complete error message produced by NetBeans?

Reply

Hi Wayan,

Can I locate my file path like this?

File destination = new File("../demo/google.html");

Hi Brian,

Yes, you can create File object using the relative path. In your example, the file path will be on the parent of your current working directory, under the demo directory.

Thanks for the reply.

I have another issue now. I am trying to implement your tutorial on my JSP but it doesn’t work as compared to the java class. I have the following codes:

<%@ page import="org.w3c.dom.*"%>
<%@ page import="javax.xml.parsers.*"%>
<%@ page import="java.io.File"%>
<%@ page import="java.io.IOException"%>
<%@ page import="java.net.URL"%>
<%@ page import="org.apache.commons.io.*"%>

<%
try {
    URL url = new URL("http://10.12.123.12:1234/jspdemo/xmldata/xml_agency.jsp");
    File destination = new File("agencies.xml");

    // Copy bytes from the URL to the destination file.
    FileUtils.copyURLToFile(url, destination);

} catch (IOException e) {
    e.printStackTrace();
}

%>

and it returns:

Aug 30, 2017 9:25:37 AM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [jsp] in context with path [/jspdemo] threw exception 
[Unable to compile class for JSP: 

An error occurred at line: 15 in the jsp file: /ReadXML.jsp
FileUtils cannot be resolved

What causes the exception?

Appreciate your help.

Hi Brian,

The error said that it cannot resolved the FileUtils class. Make sure you have the Apache Commons IO library in your web application. In should be in the WEB-INF\lib directory of your web application.

6 Comments

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