DecryptUsing7z.java

package ca.ontario.moh.stix.loadfile;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 * Decrypt file using 7zip
 *
 */
public class App {

    public static void main(String[] args) throws IOException, InterruptedException {
        if (args.length != 2) throw new IllegalArgumentException("usage: program file password");
        
        Runtime r = Runtime.getRuntime();
        Process p = r.exec("\"c:\\Program Files\\7-Zip\\7z.exe\" x -so " + args[0] + " -p" + args[1]);
        BufferedReader b = new BufferedReader(new InputStreamReader(p.getInputStream()));
        BufferedReader e = new BufferedReader(new InputStreamReader(p.getErrorStream()));
        String line;
        System.out.println("\n\nFile Contents:\n");
        while ((line = b.readLine()) != null) {
            System.out.println(line);
        }
        System.out.println("\n\nErrors:\n");
        while ((line = e.readLine()) != null) {
            System.out.println(line);
        }
        p.waitFor();
    }
}

Not pretty but simple and it works. Reading the crypto docs was giving me a major headache!

OK, checked out winzipaes and ran the tests successfully. Going with that as superior solution. This is still decent example for executing runtime and capturing sysout, syserr in a java program should I ever feel the need.