这会将提取.exe到本地磁盘上的本地文件。当Java程序存在时，该文件将被删除。
import java.io.Closeable;import java.io.File;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.URI;import java.net.URISyntaxException;import java.net.URL;import java.security.CodeSource;import java.security.ProtectionDomain;import java.util.zip.ZipEntry;import java.util.zip.ZipException;import java.util.zip.ZipFile;public class Main{ public static void main(final String[] args) throws URISyntaxException, ZipException, IOException { final URI uri; final URI exe; uri = getJarURI(); exe = getFile(uri, "Main.class"); System.out.println(exe); } private static URI getJarURI() throws URISyntaxException { final ProtectionDomain domain; final CodeSource source; final URL url; final URI uri; domain = Main.class.getProtectionDomain(); source = domain.getCodeSource(); url = source.getLocation(); uri = url.toURI(); return (uri); } private static URI getFile(final URI where, final String fileName) throws ZipException, IOException { final File location; final URI fileURI; location = new File(where); // not in a JAR, just return the path on disk if(location.isDirectory()) { fileURI = URI.create(where.toString() + fileName); } else { final ZipFile zipFile; zipFile = new ZipFile(location); try { fileURI = extract(zipFile, fileName); } finally { zipFile.close(); } } return (fileURI); } private static URI extract(final ZipFile zipFile, final String fileName) throws IOException { final File tempFile; final ZipEntry entry; final InputStream zipStream; OutputStream fileStream; tempFile = File.createTempFile(fileName, Long.toString(System.currentTimeMillis())); tempFile.deleteonExit(); entry = zipFile.getEntry(fileName); if(entry == null) { throw new FileNotFoundException("cannot find file: " + fileName + " in archive: " + zipFile.getName()); } zipStream = zipFile.getInputStream(entry); fileStream = null; try { final byte[] buf; int i; fileStream = new FileOutputStream(tempFile); buf = new byte[1024]; i = 0; while((i = zipStream.read(buf)) != -1) { fileStream.write(buf, 0, i); } } finally { close(zipStream); close(fileStream); } return (tempFile.toURI()); } private static void close(final Closeable stream) { if(stream != null) { try { stream.close(); } catch(final IOException ex) { ex.printStackTrace(); } } }}
