Java JarEntry.setCrc方法代码示例

import java.util.jar.JarEntry; //导入方法依赖的package包/类
private static void writeJarEntry(JarOutputStream jos, String path, File f) throws IOException, FileNotFoundException {
    JarEntry je = new JarEntry(path);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    InputStream is = new FileInputStream(f);
    try {
        copyStreams(is, baos);
    } finally {
        is.close();
    }
    byte[] data = baos.toByteArray();
    je.setSize(data.length);
    CRC32 crc = new CRC32();
    crc.update(data);
    je.setCrc(crc.getValue());
    jos.putNextEntry(je);
    jos.write(data);
}
 

import java.util.jar.JarEntry; //导入方法依赖的package包/类
/**
 * Create a fresh JAR file.
 * @param jar the file to create
 * @param contents keys are JAR entry paths, values are text contents (will be written in UTF-8)
 * @param manifest a manifest to store (or null for none)
 * @deprecated use {@link JarBuilder} instead
 */
@Deprecated
public static void createJar(File jar, Map<String,String> contents, Manifest manifest) throws IOException {
    if (manifest != null) {
        manifest.getMainAttributes().putValue("Manifest-Version", "1.0"); // workaround for JDK bug
    }
    jar.getParentFile().mkdirs();
    OutputStream os = new FileOutputStream(jar);
    try {
        JarOutputStream jos = manifest != null ? new JarOutputStream(os, manifest) : new JarOutputStream(os);
        for (Map.Entry<String,String> entry : contents.entrySet()) {
            String path = entry.getKey();
            byte[] data = entry.getValue().getBytes("UTF-8");
            JarEntry je = new JarEntry(path);
            je.setSize(data.length);
            CRC32 crc = new CRC32();
            crc.update(data);
            je.setCrc(crc.getValue());
            jos.putNextEntry(je);
            jos.write(data);
        }
        jos.close();
    } finally {
        os.close();
    }
}
 

import java.util.jar.JarEntry; //导入方法依赖的package包/类
/**
 * Create a fresh JAR file.
 * @param jar the file to create
 * @param contents keys are JAR entry paths, values are text contents (will be written in UTF-8)
 * @param manifest a manifest to store (key/value pairs for main section)
 */
public static void createJar(File jar, Map<String,String> contents, Map<String,String> manifest) throws IOException {
    // XXX use TestFileUtils.writeZipFile
    Manifest m = new Manifest();
    m.getMainAttributes().putValue("Manifest-Version", "1.0"); // workaround for JDK bug
    for (Map.Entry<String,String> line : manifest.entrySet()) {
        m.getMainAttributes().putValue(line.getKey(), line.getValue());
    }
    jar.getParentFile().mkdirs();
    OutputStream os = new FileOutputStream(jar);
    try {
        JarOutputStream jos = new JarOutputStream(os, m);
        Iterator it = contents.entrySet().iterator();
        while (it.hasNext()) {
            Map.Entry entry = (Map.Entry) it.next();
            String path = (String) entry.getKey();
            byte[] data = ((String) entry.getValue()).getBytes("UTF-8");
            JarEntry je = new JarEntry(path);
            je.setSize(data.length);
            CRC32 crc = new CRC32();
            crc.update(data);
            je.setCrc(crc.getValue());
            jos.putNextEntry(je);
            jos.write(data);
        }
        jos.close();
    } finally {
        os.close();
    }
}
 

import java.util.jar.JarEntry; //导入方法依赖的package包/类
/**
 * Check that jar: URLs are correctly mapped back into JarFileSystem resources.
 * @see "#39190"
 */
public void testJarMapping() throws Exception {
    clearWorkDir();
    File workdir = getWorkDir();
    File jar = new File(workdir, "test.jar");
    String textPath = "x.txt";
    OutputStream os = new FileOutputStream(jar);
    try {
        JarOutputStream jos = new JarOutputStream(os);
        jos.setMethod(ZipEntry.STORED);
        JarEntry entry = new JarEntry(textPath);
        entry.setSize(0L);
        entry.setTime(System.currentTimeMillis());
        entry.setCrc(new CRC32().getValue());
        jos.putNextEntry(entry);
        jos.flush();
        jos.close();
    } finally {
        os.close();
    }
    assertTrue("JAR was created", jar.isFile());
    assertTrue("JAR is not empty", jar.length() > 0L);
    JarFileSystem jfs = new JarFileSystem();
    jfs.setJarFile(jar);
    Repository.getDefault().addFileSystem(jfs);
    FileObject rootFO = jfs.getRoot();
    FileObject textFO = jfs.findResource(textPath);
    assertNotNull("JAR contains a/b.txt", textFO);
    String rootS = "jar:" + BaseUtilities.toURI(jar) + "!/";
    URL rootU = new URL(rootS);
    URL textU = new URL(rootS + textPath);
    assertEquals("correct FO -> URL for root", rootU, URLMapper.findURL(rootFO, URLMapper.EXTERNAL));
    assertEquals("correct FO -> URL for " + textPath, textU, URLMapper.findURL(textFO, URLMapper.EXTERNAL));
    assertTrue("correct URL -> FO for root", Arrays.asList(URLMapper.findFileObjects(rootU)).contains(rootFO));
    assertTrue("correct URL -> FO for " + textPath, Arrays.asList(URLMapper.findFileObjects(textU)).contains(textFO));
}
 

import java.util.jar.JarEntry; //导入方法依赖的package包/类
private void unpackSegment(InputStream in, JarOutputStream out) throws IOException {
    props.setProperty(java.util.jar.Pack200.Unpacker.PROGRESS,"0");
    // Process the output directory or jar output.
    new PackageReader(pkg, in).read();

    if (props.getBoolean("unpack.strip.debug"))    pkg.stripAttributeKind("Debug");
    if (props.getBoolean("unpack.strip.compile"))  pkg.stripAttributeKind("Compile");
    props.setProperty(java.util.jar.Pack200.Unpacker.PROGRESS,"50");
    pkg.ensureAllClassFiles();
    // Now write out the files.
    Set<Package.Class> classesToWrite = new HashSet<>(pkg.getClasses());
    for (Package.File file : pkg.getFiles()) {
        String name = file.nameString;
        JarEntry je = new JarEntry(Utils.getJarEntryName(name));
        boolean deflate;

        deflate = (keepDeflateHint)
                  ? (((file.options & Constants.FO_DEFLATE_HINT) != 0) ||
                    ((pkg.default_options & Constants.AO_DEFLATE_HINT) != 0))
                  : deflateHint;

        boolean needCRC = !deflate;  // STORE mode requires CRC

        if (needCRC)  crc.reset();
        bufOut.reset();
        if (file.isClassStub()) {
            Package.Class cls = file.getStubClass();
            assert(cls != null);
            new ClassWriter(cls, needCRC ? crcOut : bufOut).write();
            classesToWrite.remove(cls);  // for an error check
        } else {
            // collect data & maybe CRC
            file.writeTo(needCRC ? crcOut : bufOut);
        }
        je.setMethod(deflate ? JarEntry.DEFLATED : JarEntry.STORED);
        if (needCRC) {
            if (verbose > 0)
                Utils.log.info("stored size="+bufOut.size()+" and crc="+crc.getValue());

            je.setMethod(JarEntry.STORED);
            je.setSize(bufOut.size());
            je.setCrc(crc.getValue());
        }
        if (keepModtime) {
            je.setTime(file.modtime);
            // Convert back to milliseconds
            je.setTime((long)file.modtime * 1000);
        } else {
            je.setTime((long)modtime * 1000);
        }
        out.putNextEntry(je);
        bufOut.writeTo(out);
        out.closeEntry();
        if (verbose > 0)
            Utils.log.info("Writing "+Utils.zeString((ZipEntry)je));
    }
    assert(classesToWrite.isEmpty());
    props.setProperty(java.util.jar.Pack200.Unpacker.PROGRESS,"100");
    pkg.reset();  // reset for the next segment, if any
}
 

import java.util.jar.JarEntry; //导入方法依赖的package包/类
public static void main(String[] args) throws Exception {

        String srcDir = System.getProperty("test.src", ".");
        String keystore = srcDir + "/JarSigning.keystore";
        String jarName = "largeJarEntry.jar";

        // Set java.io.tmpdir to the current working dir (see 6474350)
        System.setProperty("java.io.tmpdir", System.getProperty("user.dir"));

        // first, create jar file with 8M uncompressed entry
        // note, we set the max heap size to 8M in @run tag above
        byte[] bytes = new byte[1000000];
        CRC32 crc = new CRC32();
        for (int i=0; i<8; i++) {
            crc.update(bytes);
        }
        JarEntry je = new JarEntry("large");
        je.setSize(8000000l);
        je.setMethod(JarEntry.STORED);
        je.setCrc(crc.getValue());
        File file = new File(jarName);
        FileOutputStream os = new FileOutputStream(file);
        JarOutputStream jos = new JarOutputStream(os);
        jos.setMethod(JarEntry.STORED);
        jos.putNextEntry(je);
        for (int i=0; i<8; i++) {
            jos.write(bytes, 0, bytes.length);
        }
        jos.close();

        String[] jsArgs = { "-keystore", keystore, "-storepass", "bbbbbb",
                jarName, "b" };
        // now, try to sign it
        try {
            sun.security.tools.jarsigner.Main.main(jsArgs);
        } catch (OutOfMemoryError err) {
            throw new Exception("Test failed with OutOfMemoryError", err);
        } finally {
            // remove jar file
            file.delete();
        }
    }
 

import java.util.jar.JarEntry; //导入方法依赖的package包/类
private void unpackSegment(InputStream in, JarOutputStream out) throws IOException {
    props.setProperty(java.util.jar.Pack200.Unpacker.PROGRESS,"0");
    // Process the output directory or jar output.
    new PackageReader(pkg, in).read();

    if (props.getBoolean("unpack.strip.debug"))    pkg.stripAttributeKind("Debug");
    if (props.getBoolean("unpack.strip.compile"))  pkg.stripAttributeKind("Compile");
    props.setProperty(java.util.jar.Pack200.Unpacker.PROGRESS,"50");
    pkg.ensureAllClassFiles();
    // Now write out the files.
    Set<Package.Class> classesToWrite = new HashSet<>(pkg.getClasses());
    for (Package.File file : pkg.getFiles()) {
        String name = file.nameString;
        JarEntry je = new JarEntry(Utils.getJarEntryName(name));
        boolean deflate;

        deflate = (keepDeflateHint)
                  ? (((file.options & Constants.FO_DEFLATE_HINT) != 0) ||
                    ((pkg.default_options & Constants.AO_DEFLATE_HINT) != 0))
                  : deflateHint;

        boolean needCRC = !deflate;  // STORE mode requires CRC

        if (needCRC)  crc.reset();
        bufOut.reset();
        if (file.isClassStub()) {
            Package.Class cls = file.getStubClass();
            assert(cls != null);
            new ClassWriter(cls, needCRC ? crcOut : bufOut).write();
            classesToWrite.remove(cls);  // for an error check
        } else {
            // collect data & maybe CRC
            file.writeTo(needCRC ? crcOut : bufOut);
        }
        je.setMethod(deflate ? JarEntry.DEFLATED : JarEntry.STORED);
        if (needCRC) {
            if (verbose > 0)
                Utils.log.info("stored size="+bufOut.size()+" and crc="+crc.getValue());

            je.setMethod(JarEntry.STORED);
            je.setSize(bufOut.size());
            je.setCrc(crc.getValue());
        }
        if (keepModtime) {
            LocalDateTime ldt = LocalDateTime
                    .ofEpochSecond(file.modtime, 0, ZoneOffset.UTC);
            je.setTimeLocal(ldt);
        } else {
            je.setTime((long)modtime * 1000);
        }
        out.putNextEntry(je);
        bufOut.writeTo(out);
        out.closeEntry();
        if (verbose > 0)
            Utils.log.info("Writing "+Utils.zeString((ZipEntry)je));
    }
    assert(classesToWrite.isEmpty());
    props.setProperty(java.util.jar.Pack200.Unpacker.PROGRESS,"100");
    pkg.reset();  // reset for the next segment, if any
}