How do I connect to an https URL to download a file?

So is the error happening on line 2 then?

Firstly install Openssl to support HTTPS communication. Download OpenSSL exe from web and install, then can use below code.

import java.io.*;
import java.net.*;
 
class Test{
    
    public void getZip(String link, String file) throws Exception{
        URL url = new URL(link);
        URLConnection urlConnection = url.openConnection();
        DataInputStream dis = new DataInputStream(urlConnection.getInputStream());
        DataOutputStream out = new DataOutputStream(new FileOutputStream( file  ) );
        
        int i;
        while ((i = dis.read()) != -1) {
            out.write( i );
        }
        out.flush();
        dis.close();
    }
    
    public static void main(String []argv) throws Exception{
        new Test().getZip("https://code.bandit-project.org/trac/export/3/trunk/RoleEngine/doc/rejavadoc.zip", "out.zip");
    }
}

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CEHJ -

I attempted to your solution, but am having a problem.  I created a new package to hold the MyAuthenticator class and imported that package into my main java program.  

The first line in my code (as per the example) is this:

java.net.Authenticator.setDefault( new com.dva.Authenticator.MyAuthenticator() );

However, I am getting a "class com.dva.Authenticator.MyAuthenticator() cannot be resolved".
It seems it doesn't like "MyAuthenticator()" when attempted to create the object.

Below is the java file that I put into a package called com.dva.Authenticator:

package com.dva.Authenticator;
 
import java.net.*;
 
    public class MyAuthenticator extends Authenticator {
        // This method is called when a password-protected URL is accessed
        protected PasswordAuthentication getPasswordAuthentication() {
            // Get information about the request
            String promptString = getRequestingPrompt();
            String hostname = getRequestingHost();
            InetAddress ipaddr = getRequestingSite();
            int port = getRequestingPort();
 
            // Get the username from the user...
            String username = "myusername";
 
            // Get the password from the user...
            String password = "mypassword";
 
            // Return the information
            return new PasswordAuthentication(username, password.toCharArray());
        }
    }

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ok, just an update.  I got the classes to work correctly per CEHJ's example.  

However, I am getting a different error:

Access denied (java.net.NetPermission setDefaultAuthenticator)|#]

You've got a SecurityManager in place? Are you doing this inside a servlet container?

I'm writing the code inside Sun's JCAPS application.

I'm not sure if there is a SecurityMangager in place or not.

I'm also not sure if the java collaboration inside of JCAPS is considered a servlet container.

Thanks CEHJ for your continued help.

I do have a java.policy file (pasted below)  in one of the application server directories.  Do I need to add a permission entry into this file?

If so, can you give me an example of what it would look like?

Or maybe I'm not on the right track at all.

I'm not explicitly enabling the security manager, but it might be something the App server is enabling by default somehow.  Otherwise, how would I go about disabling it?

//
// @(#)src/security/sov/config/java.policy, security, asdev, 20050521 1.4
// ===========================================================================
// Licensed Materials - Property of IBM
// "Restricted Materials of IBM"
//
// IBM SDK, Java(tm) 2 Technology Edition, v1.4.2
// (C) Copyright IBM Corp. 1998, 2002. All Rights Reserved
// ===========================================================================
//
 
 
// Standard extensions get all permissions by default
 
grant codeBase "file:${java.home}/lib/ext/*" {
        permission java.security.AllPermission;
};
 
// default permissions granted to all domains
 
grant { 
        // Allows any thread to stop itself using the java.lang.Thread.stop()
        // method that takes no argument.
        // Note that this permission is granted by default only to remain
        // backwards compatible.
        // It is strongly recommended that you either remove this permission
        // from this policy file or further restrict it to code sources
        // that you specify, because Thread.stop() is potentially unsafe.
        // See "http://java.sun.com/notes" for more information.
        permission java.lang.RuntimePermission "stopThread";
 
        // allows anyone to listen on un-privileged ports
        permission java.net.SocketPermission "localhost:1024-", "listen";
 
        // "standard" properies that can be read by anyone
 
        permission java.util.PropertyPermission "java.version", "read";
        permission java.util.PropertyPermission "java.vendor", "read";
        permission java.util.PropertyPermission "java.vendor.url", "read";
        permission java.util.PropertyPermission "java.class.version", "read";
        permission java.util.PropertyPermission "os.name", "read";
        permission java.util.PropertyPermission "os.version", "read";
        permission java.util.PropertyPermission "os.arch", "read";
        permission java.util.PropertyPermission "file.separator", "read";
        permission java.util.PropertyPermission "path.separator", "read";
        permission java.util.PropertyPermission "line.separator", "read";
 
        permission java.util.PropertyPermission "java.specification.version", "read";
        permission java.util.PropertyPermission "java.specification.vendor", "read";
        permission java.util.PropertyPermission "java.specification.name", "read";
 
        permission java.util.PropertyPermission "java.vm.specification.version", "read";
        permission java.util.PropertyPermission "java.vm.specification.vendor", "read";
        permission java.util.PropertyPermission "java.vm.specification.name", "read";
        permission java.util.PropertyPermission "java.vm.version", "read";
        permission java.util.PropertyPermission "java.vm.vendor", "read";
        permission java.util.PropertyPermission "java.vm.name", "read";
 
};

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Just an update, I was able to get it working.  Here is what I needed to add to my server.policy file:

Replace the following line:
   permission java.util.PropertyPermission "*", "read"; with
   permission java.util.PropertyPermission "*", "read,write";

And then within the same grant clause as the above add the following line:

permission java.net.NetPermission "setDefaultAuthenticator"

Thanks CEHJ for your help!

Good - glad it's working :-)