publicclass ReadZip { privatestaticvoid unreached (Object o) throws Exception
{ // Should never get here thrownew Exception ("Expected exception was not thrown");
}
publicstaticvoid main(String args[]) throws Exception { try (ZipFile zf = new ZipFile(new File(System.getProperty("test.src", "."), "input.zip"))) { // Make sure we throw NPE on null objects try { unreached (zf.getEntry(null)); } catch (NullPointerException e) {}
ZipEntry ze = zf.getEntry("ReadZip.java"); if (ze == null) { thrownew Exception("cannot read from zip file");
}
}
// Make sure we can read the zip file that has some garbage // bytes padded at the end.
File newZip = new File(System.getProperty("test.dir", "."), "input2.zip");
Files.copy(Paths.get(System.getProperty("test.src", ""), "input.zip"),
newZip.toPath(), StandardCopyOption.REPLACE_EXISTING);
newZip.setWritable(true);
// pad some bytes try (OutputStream os = Files.newOutputStream(newZip.toPath(),
StandardOpenOption.APPEND)) {
os.write(1); os.write(3); os.write(5); os.write(7);
}
try (ZipFile zf = new ZipFile(newZip)) {
ZipEntry ze = zf.getEntry("ReadZip.java"); if (ze == null) { thrownew Exception("cannot read from zip file");
}
} finally {
newZip.delete();
}
// Read zip file comment try { try (FileOutputStream fos = new FileOutputStream(newZip);
ZipOutputStream zos = new ZipOutputStream(fos))
{
ZipEntry ze = new ZipEntry("ZipEntry");
zos.putNextEntry(ze);
zos.write(1); zos.write(2); zos.write(3); zos.write(4);
zos.closeEntry();
zos.setComment("This is the comment for testing");
}
try (ZipFile zf = new ZipFile(newZip)) {
ZipEntry ze = zf.getEntry("ZipEntry"); if (ze == null) thrownew Exception("cannot read entry from zip file"); if (!"This is the comment for testing".equals(zf.getComment())) thrownew Exception("cannot read comment from zip file");
}
} finally {
newZip.delete();
}
// Read directory entry try { try (FileOutputStream fos = new FileOutputStream(newZip);
ZipOutputStream zos = new ZipOutputStream(fos))
{
ZipEntry ze = new ZipEntry("directory/");
zos.putNextEntry(ze);
zos.closeEntry();
} try (ZipFile zf = new ZipFile(newZip)) {
ZipEntry ze = zf.getEntry("directory/"); if (ze == null || !ze.isDirectory()) thrownew RuntimeException("read entry \"directory/\" failed"); try (InputStream is = zf.getInputStream(ze)) {
is.available();
} catch (Exception x) {
x.printStackTrace();
}
// Throw a FNF exception when read a non-existing zip file try { unreached (new ZipFile( new File(System.getProperty("test.src", "."), "input"
+ String.valueOf(new java.util.Random().nextInt())
+ ".zip")));
} catch (NoSuchFileException nsfe) {}
// read a zip file with ZIP64 end
Path path = Paths.get(System.getProperty("test.dir", ""), "end64.zip"); try {
URI uri = URI.create("jar:" + path.toUri());
Map<String, Object> env = Map.of("create", "true", "forceZIP64End", "true"); try (FileSystem fs = FileSystems.newFileSystem(uri, env)) {
Files.write(fs.getPath("hello"), "hello".getBytes());
} try (ZipFile zf = new ZipFile(path.toFile())) { if (!"hello".equals(new String(zf.getInputStream(new ZipEntry("hello"))
.readAllBytes(),
US_ASCII))) thrownew RuntimeException("zipfile: read entry failed");
} catch (IOException x) { thrownew RuntimeException("zipfile: zip64 end failed");
} try (FileSystem fs = FileSystems.newFileSystem(uri, Map.of())) { if (!"hello".equals(new String(Files.readAllBytes(fs.getPath("hello"))))) thrownew RuntimeException("zipfs: read entry failed");
} catch (IOException x) { thrownew RuntimeException("zipfile: zip64 end failed");
}
} finally {
Files.deleteIfExists(path);
}
// read a zip file created via "echo hello | zip dst.zip -", which uses // ZIP64 end record if (Files.notExists(Paths.get("/usr/bin/zip"))) return; try {
Process zip = new ProcessBuilder("zip", path.toString().toString(), "-").start();
OutputStream os = zip.getOutputStream();
os.write("hello".getBytes(US_ASCII));
os.close();
zip.waitFor(); if (zip.exitValue() == 0 && Files.exists(path)) { try (ZipFile zf = new ZipFile(path.toFile())) { if (!"hello".equals(new String(zf.getInputStream(new ZipEntry("-"))
.readAllBytes()))) thrownew RuntimeException("zipfile: read entry failed");
} catch (IOException x) { thrownew RuntimeException("zipfile: zip64 end failed");
}
}
} finally {
Files.deleteIfExists(path);
}
}
}
Messung V0.5 in Prozent
¤ Dauer der Verarbeitung: 0.15 Sekunden
(vorverarbeitet am 2026-06-10)
¤
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