Java

Unzip Files Matching a Pattern (such as *.xml)

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Example code to unzip Files Matching a Pattern (such as *.xml) Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Http;
import com.chilkatsoft.chilkat2.Zip;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example works with the .zip located at http://www.example-code.com/data/test.zip

        // This example assumes the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        // First, let's download the .zip
        Http http = new Http();
        try {
            http.download("http://www.example-code.com/data/test.zip", "qa_test/test.zip");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        Zip zip = new Zip();

        String zipContentsXml;
        try {
            zip.openZip("qa_test/test.zip");

            // Show what's in the .zip by getting the directory as XML.
            zipContentsXml = zip.getDirectoryAsXML();
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        System.out.println(zipContentsXml);

        // In this case, the contents of our .zip look like this:
        // <?xml version="1.0" encoding="utf-8" ?>
        // <zip_contents>
        //     <dir name="test">
        //         <dir name="abc">
        //             <dir name="123">
        //                 <file>ecc_public.pem</file>
        //                 <file>starfish.jpg</file>
        //             </dir>
        //             <file>comodo-certificates.pem</file>
        //             <file>pigs.xml</file>
        //         </dir>
        //         <file>COMODORSACertificationAuthority.crt</file>
        //         <file>hamlet.xml</file>
        //     </dir>
        // </zip_contents>

        // ------------------------------------------------------------------------
        // If we wish to unzip only .xml files, use "*.xml" for the pattern\
        // Unzip to the "qa_output" directory relative to our current working directory.
        // (You may unzip to an absolute path by passing an absolute path, such as "/someDir" or
        // "C:/someDir", etc.)
        // This will unzip only the .xml files.  The relative directory structure within
        // the .zip will be created in the local filesystem under the unzip directory
        // path passed in the first argument, which in this case is "qa_output".
        int count = zip.unzipMatching("qa_output", "*.xml", true);
        if (count < 0) {
            System.out.println(zip.getLastErrorText());
            return;
        }

        System.out.println("unzipped " + count + " matching file(s).");

        // ------------------------------------------------------------------------
        // If we wish to unzip only files under the "123" directory, we can do this:
        count = zip.unzipMatching("qa_output2", "*/123/*", true);
        if (count < 0) {
            System.out.println(zip.getLastErrorText());
            return;
        }

        System.out.println("unzipped " + count + " matching file(s).");

        // ------------------------------------------------------------------------
        // If no asterisk character is used, then the match must be exact.
        // For example, to unzip "test/hamlet.xml" we must pass the exact path
        // as it is in the .zip.  We cannot just pass "hamlet.xml".
        count = zip.unzipMatching("qa_output3", "test/hamlet.xml", true);
        if (count < 0) {
            System.out.println(zip.getLastErrorText());
            return;
        }

        System.out.println("unzipped " + count + " matching file(s).");

        // ------------------------------------------------------------------------
        // If we want to unzip any file named "hamlet.xml" found in any sub-directory...
        count = zip.unzipMatching("qa_output4", "*/hamlet.xml", true);
        if (count < 0) {
            System.out.println(zip.getLastErrorText());
            return;
        }

        System.out.println("unzipped " + count + " matching file(s).");
    }
}