Java tutorial
package ca.uhn.fhir.jpa.dao; /* * #%L * HAPI FHIR JPA Server * %% * Copyright (C) 2014 - 2016 University Health Network * %% * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * #L% */ import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.util.zip.GZIPInputStream; import java.util.zip.GZIPOutputStream; import org.apache.commons.io.IOUtils; import ca.uhn.fhir.parser.DataFormatException; public class GZipUtil { public static String decompress(byte[] theResource) { GZIPInputStream is; try { is = new GZIPInputStream(new ByteArrayInputStream(theResource)); return IOUtils.toString(is, "UTF-8"); } catch (IOException e) { throw new DataFormatException("Failed to decompress contents", e); } } public static byte[] compress(String theEncoded) { try { ByteArrayOutputStream os = new ByteArrayOutputStream(); GZIPOutputStream gos = new GZIPOutputStream(os); IOUtils.write(theEncoded, gos, "UTF-8"); gos.close(); os.close(); byte[] retVal = os.toByteArray(); return retVal; } catch (IOException e) { throw new DataFormatException("Compress contents", e); } } }