如何使用JarOutputStream创建JAR文件？

事实证明，这JarOutputStream有三个未记录的怪癖：

1. 目录名称必须以“ /”斜杠结尾。
2. 路径必须使用“ /”斜杠，而不是“ ”
3. 条目不能以“ /”斜杠开头。

这是创建Jar文件的正确方法：

public void run() throws IOException{  Manifest manifest = new Manifest();  manifest.getMainAttributes().put(Attributes.Name.MANIFEST_VERSION, "1.0");  JarOutputStream target = new JarOutputStream(new FileOutputStream("output.jar"), manifest);  add(new File("inputDirectory"), target);  target.close();}private void add(File source, JarOutputStream target) throws IOException{  BufferedInputStream in = null;  try  {    if (source.isDirectory())    {      String name = source.getPath().replace("\", "/");      if (!name.isEmpty())      {        if (!name.endsWith("/"))          name += "/";        JarEntry entry = new JarEntry(name);        entry.setTime(source.lastModified());        target.putNextEntry(entry);        target.closeEntry();      }      for (File nestedFile: source.listFiles())        add(nestedFile, target);      return;    }    JarEntry entry = new JarEntry(source.getPath().replace("\", "/"));    entry.setTime(source.lastModified());    target.putNextEntry(entry);    in = new BufferedInputStream(new FileInputStream(source));    byte[] buffer = new byte[1024];    while (true)    {      int count = in.read(buffer);      if (count == -1)        break;      target.write(buffer, 0, count);    }    target.closeEntry();  }  finally  {    if (in != null)      in.close();  }}