Create a Dynamic Web Project in Eclipse. Let's say the name of the project is downloadFile.
In the left panel of Eclipse, at the name of your project (downloadFile in this example) > Java Resources > src, create a new package. For the sake of this tutorial, let's name the package com.download.file.
In the package, create a class called download.
In download.java, add the following markup.
package com.download.file;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URL;
import java.nio.channels.Channels;
import java.nio.channels.ReadableByteChannel;
public class download{
public String downloadFile() {
String result = "";
try {
String urlString = "http://www.example.com/foo.txt";
// Linux target
String destination = "/tmp/foo.txt";
// Windows target
String destination = "C:\\Users\\JohnDoe\\Documents\\foo.txt";
URL website = new URL(urlString);
ReadableByteChannel rbc;
rbc = Channels.newChannel(website.openStream());
FileOutputStream fos = new FileOutputStream(destination);
fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
fos.close();
rbc.close();
response = "Success"
} catch (IOException e) {
e.printStackTrace();
response = "Failed"
} finally {
if (fos != null) {
result = "Successfully downloaded foo.txt from http://www.example.com";
}
else {
result = "Failed to download foo.txt from http://www.example.com";
}
}
System.out.println(result);
return result;
}
}
In the left panel of Eclipse, right click on the name of your project (downloadFile in this example) and select New > JSP File. Select the WebContent folder, give the file a name such as index.jsp, and select Finish.
Add the following to line 1 of the JSP file. This is the combination of the package (com.download.file) and the class (download.java).
<%@page import="com.download.file.download"%>
Add the following inside the <body> tags.
- In this example, "download" must be used because the name of the class in download.java is connect.
- In this example, "downloadFile" must be cause because the name of the method in download.java is downloadFile.
<body>
<%
download foo = new download();
out.println(foo.downloadFile());
%>
</body>
Select the green play button in Eclipse, and the file should be downloaded.
Did you find this article helpful?
If so, consider buying me a coffee over at 