Java 中的 Windows 快捷方式 (.lnk) 解析器？

Windows shortcut (.lnk) parser in Java?

提问by Zarkonnen

I'm currently using Win32ShellFolderManager2and ShellFolder.getLinkLocationto resolve windows shortcuts in Java. Unfortunately, if the Java program is running as a service under Vista, getLinkLocation, this does not work. Specifically, I get an exception stating "Could not get shell folder ID list".

我目前正在使用Win32ShellFolderManager2并ShellFolder.getLinkLocation解决 Java 中的 Windows 快捷方式。不幸的是，如果 Java 程序在 Vista 下作为服务运行getLinkLocation，则这不起作用。具体来说，我收到一个异常，指出“无法获取 shell 文件夹 ID 列表”。

Searching the web does turn up mentions of this error message, but always in connection with JFileChooser. I'm not using JFileChooser, I just need to resolve a .lnkfile to its destination.

搜索网络确实会提到此错误消息，但始终与JFileChooser. 我没有使用JFileChooser，我只需要将.lnk文件解析到其目的地。

Does anyone know of a 3rd-party parser for .lnkfiles written in Java I could use?

有谁知道.lnk我可以使用的用 Java 编写的文件的第 3 方解析器吗？

I've since found unofficial documentation for the .lnk format here, but I'd rather not have to do the work if anyone has done it before, since the format is rather scary.

从那以后，我在这里找到了 .lnk 格式的非官方文档，但如果有人以前做过，我宁愿不必做这项工作，因为这种格式相当可怕。

采纳答案by Codebling

Added comments (some explanation as well as credit to each contributor so far),additional check on the file magic, a quick test to see if a given file might be a valid link (without reading all of the bytes), a fix to throw a ParseException with appropriate message instead of ArrayIndexOutOfBoundsException if the file is too small, did some general clean-up.

添加了评论（到目前为止对每个贡献者的一些解释和功劳），对文件魔法的额外检查，快速测试以查看给定文件是否可能是有效链接（不读取所有字节），修复抛出如果文件太小，带有适当消息的 ParseException 而不是 ArrayIndexOutOfBoundsException，做了一些常规清理。

Source here(if you have any changes, push them right to the GitHub repo/project.

来源在这里（如果您有任何更改，请将它们直接推送到 GitHub repo/ project。

package org.stackoverflowusers.file;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.ParseException;

/**
 * Represents a Windows shortcut (typically visible to Java only as a '.lnk' file).
 *
 * Retrieved 2011-09-23 from http://stackoverflow.com/questions/309495/windows-shortcut-lnk-parser-in-java/672775#672775
 * Originally called LnkParser
 *
 * Written by: (the stack overflow users, obviously!)
 *   Apache Commons VFS dependency removed by crysxd (why were we using that!?) https://github.com/crysxd
 *   Headerified, refactored and commented by Code Bling http://stackoverflow.com/users/675721/code-bling
 *   Network file support added by Stefan Cordes http://stackoverflow.com/users/81330/stefan-cordes
 *   Adapted by Sam Brightman http://stackoverflow.com/users/2492/sam-brightman
 *   Based on information in 'The Windows Shortcut File Format' by Jesse Hager <[email protected]>
 *   And somewhat based on code from the book 'Swing Hacks: Tips and Tools for Killer GUIs'
 *     by Joshua Marinacci and Chris Adamson
 *     ISBN: 0-596-00907-0
 *     http://www.oreilly.com/catalog/swinghks/
 */
public class WindowsShortcut
{
    private boolean isDirectory;
    private boolean isLocal;
    private String real_file;

    /**
     * Provides a quick test to see if this could be a valid link !
     * If you try to instantiate a new WindowShortcut and the link is not valid,
     * Exceptions may be thrown and Exceptions are extremely slow to generate,
     * therefore any code needing to loop through several files should first check this.
     *
     * @param file the potential link
     * @return true if may be a link, false otherwise
     * @throws IOException if an IOException is thrown while reading from the file
     */
    public static boolean isPotentialValidLink(File file) throws IOException {
        final int minimum_length = 0x64;
        InputStream fis = new FileInputStream(file);
        boolean isPotentiallyValid = false;
        try {
            isPotentiallyValid = file.isFile()
                && file.getName().toLowerCase().endsWith(".lnk")
                && fis.available() >= minimum_length
                && isMagicPresent(getBytes(fis, 32));
        } finally {
            fis.close();
        }
        return isPotentiallyValid;
    }

    public WindowsShortcut(File file) throws IOException, ParseException {
        InputStream in = new FileInputStream(file);
        try {
            parseLink(getBytes(in));
        } finally {
            in.close();
        }
    }

    /**
     * @return the name of the filesystem object pointed to by this shortcut
     */
    public String getRealFilename() {
        return real_file;
    }

    /**
     * Tests if the shortcut points to a local resource.
     * @return true if the 'local' bit is set in this shortcut, false otherwise
     */
    public boolean isLocal() {
        return isLocal;
    }

    /**
     * Tests if the shortcut points to a directory.
     * @return true if the 'directory' bit is set in this shortcut, false otherwise
     */
    public boolean isDirectory() {
        return isDirectory;
    }

    /**
     * Gets all the bytes from an InputStream
     * @param in the InputStream from which to read bytes
     * @return array of all the bytes contained in 'in'
     * @throws IOException if an IOException is encountered while reading the data from the InputStream
     */
    private static byte[] getBytes(InputStream in) throws IOException {
        return getBytes(in, null);
    }

    /**
     * Gets up to max bytes from an InputStream
     * @param in the InputStream from which to read bytes
     * @param max maximum number of bytes to read
     * @return array of all the bytes contained in 'in'
     * @throws IOException if an IOException is encountered while reading the data from the InputStream
     */
    private static byte[] getBytes(InputStream in, Integer max) throws IOException {
        // read the entire file into a byte buffer
        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        byte[] buff = new byte[256];
        while (max == null || max > 0) {
            int n = in.read(buff);
            if (n == -1) {
                break;
            }
            bout.write(buff, 0, n);
            if (max != null)
                max -= n;
        }
        in.close();
        return bout.toByteArray();
    }

    private static boolean isMagicPresent(byte[] link) {
        final int magic = 0x0000004C;
        final int magic_offset = 0x00;
        return link.length >= 32 && bytesToDword(link, magic_offset) == magic;
    }

    /**
     * Gobbles up link data by parsing it and storing info in member fields
     * @param link all the bytes from the .lnk file
     */
    private void parseLink(byte[] link) throws ParseException {
        try {
            if (!isMagicPresent(link))
                throw new ParseException("Invalid shortcut; magic is missing", 0);

            // get the flags byte
            byte flags = link[0x14];

            // get the file attributes byte
            final int file_atts_offset = 0x18;
            byte file_atts = link[file_atts_offset];
            byte is_dir_mask = (byte)0x10;
            if ((file_atts & is_dir_mask) > 0) {
                isDirectory = true;
            } else {
                isDirectory = false;
            }

            // if the shell settings are present, skip them
            final int shell_offset = 0x4c;
            final byte has_shell_mask = (byte)0x01;
            int shell_len = 0;
            if ((flags & has_shell_mask) > 0) {
                // the plus 2 accounts for the length marker itself
                shell_len = bytesToWord(link, shell_offset) + 2;
            }

            // get to the file settings
            int file_start = 0x4c + shell_len;

            final int file_location_info_flag_offset_offset = 0x08;
            int file_location_info_flag = link[file_start + file_location_info_flag_offset_offset];
            isLocal = (file_location_info_flag & 2) == 0;
            // get the local volume and local system values
            //final int localVolumeTable_offset_offset = 0x0C;
            final int basename_offset_offset = 0x10;
            final int networkVolumeTable_offset_offset = 0x14;
            final int finalname_offset_offset = 0x18;
            int finalname_offset = link[file_start + finalname_offset_offset] + file_start;
            String finalname = getNullDelimitedString(link, finalname_offset);
            if (isLocal) {
                int basename_offset = link[file_start + basename_offset_offset] + file_start;
                String basename = getNullDelimitedString(link, basename_offset);
                real_file = basename + finalname;
            } else {
                int networkVolumeTable_offset = link[file_start + networkVolumeTable_offset_offset] + file_start;
                int shareName_offset_offset = 0x08;
                int shareName_offset = link[networkVolumeTable_offset + shareName_offset_offset]
                    + networkVolumeTable_offset;
                String shareName = getNullDelimitedString(link, shareName_offset);
                real_file = shareName + "\" + finalname;
            }
        } catch (ArrayIndexOutOfBoundsException e) {
            throw new ParseException("Could not be parsed, probably not a valid WindowsShortcut", 0);
        }
    }

    private static String getNullDelimitedString(byte[] bytes, int off) {
        int len = 0;
        // count bytes until the null character (0)
        while (true) {
            if (bytes[off + len] == 0) {
                break;
            }
            len++;
        }
        return new String(bytes, off, len);
    }

    /*
     * convert two bytes into a short note, this is little endian because it's
     * for an Intel only OS.
     */
    private static int bytesToWord(byte[] bytes, int off) {
        return ((bytes[off + 1] & 0xff) << 8) | (bytes[off] & 0xff);
    }

    private static int bytesToDword(byte[] bytes, int off) {
        return (bytesToWord(bytes, off + 2) << 16) | bytesToWord(bytes, off);
    }

}

回答by Sam Brightman

The code plan9assembler linked to appears to work with minor modification. I think it's just the "& 0xff" to prevent sign extension when bytes are upcast to ints in the bytes2shortfunction that need changing. I've added the functionality described in http://www.i2s-lab.com/Papers/The_Windows_Shortcut_File_Format.pdfto concatenate the "final part of the pathname" even though in practice this doesn't seem to be used in my examples. I've not added any error checking to the header or dealt with network shares. Here's what I'm using now:

链接到的代码 plan9assembler 似乎只需稍作修改即可工作。我认为这只是在需要更改的函数中将s 向上转换为s& 0xff时防止符号扩展的“ ” 。我已经添加了http://www.i2s-lab.com/Papers/The_Windows_Shortcut_File_Format.pdf 中描述的功能来连接“路径名的最后一部分”，即使在实践中这似乎并没有在我的示例中使用. 我没有在标题中添加任何错误检查或处理网络共享。这是我现在正在使用的：byteintbytes2short

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.text.DecimalFormat;
import java.text.NumberFormat;

public class LnkParser {

    public LnkParser(File f) throws Exception {
        parse(f);
    }

    private boolean is_dir;

    public boolean isDirectory() {
        return is_dir;
    }

    private String real_file;

    public String getRealFilename() {
        return real_file;
    }

    private void parse(File f) throws Exception {
        // read the entire file into a byte buffer
        FileInputStream fin = new FileInputStream(f);
        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        byte[] buff = new byte[256];
        while (true) {
            int n = fin.read(buff);
            if (n == -1) {
                break;
            }
            bout.write(buff, 0, n);
        }
        fin.close();
        byte[] link = bout.toByteArray();

        // get the flags byte
        byte flags = link[0x14];

        // get the file attributes byte
        final int file_atts_offset = 0x18;
        byte file_atts = link[file_atts_offset];
        byte is_dir_mask = (byte) 0x10;
        if ((file_atts & is_dir_mask) > 0) {
            is_dir = true;
        } else {
            is_dir = false;
        }

        // if the shell settings are present, skip them
        final int shell_offset = 0x4c;
        final byte has_shell_mask = (byte) 0x01;
        int shell_len = 0;
        if ((flags & has_shell_mask) > 0) {
            // the plus 2 accounts for the length marker itself
            shell_len = bytes2short(link, shell_offset) + 2;
        }

        // get to the file settings
        int file_start = 0x4c + shell_len;

        // get the local volume and local system values
        final int basename_offset_offset = 0x10;
        final int finalname_offset_offset = 0x18;
        int basename_offset = link[file_start + basename_offset_offset]
                                + file_start;
        int finalname_offset = link[file_start + finalname_offset_offset]
                                + file_start;
        String basename = getNullDelimitedString(link, basename_offset);
        String finalname = getNullDelimitedString(link, finalname_offset);
        real_file = basename + finalname;
    }

    private static String getNullDelimitedString(byte[] bytes, int off) {
        int len = 0;
        // count bytes until the null character (0)
        while (true) {
            if (bytes[off + len] == 0) {
                break;
            }
            len++;
        }
        return new String(bytes, off, len);
    }

    /*
     * convert two bytes into a short note, this is little endian because it's
     * for an Intel only OS.
     */
    private static int bytes2short(byte[] bytes, int off) {
        return ((bytes[off + 1] & 0xff) << 8) | (bytes[off] & 0xff);
    }
}

回答by Sam Brightman

Sam Brightman's solutionis for local files only. I added support for Network files:

Sam Brightman 的解决方案仅适用于本地文件。我添加了对网络文件的支持：

• Windows shortcut (.lnk) parser in Java?
• http://code.google.com/p/8bits/downloads/detail?name=The_Windows_Shortcut_File_Format.pdf

• http://www.javafaq.nu/java-example-code-468.html

  public class LnkParser {
  
  public LnkParser(File f) throws IOException {
      parse(f);
  }
  
  private boolean isDirectory;
  private boolean isLocal;
  
  public boolean isDirectory() {
      return isDirectory;
  }
  
  private String real_file;
  
  public String getRealFilename() {
      return real_file;
  }
  
  private void parse(File f) throws IOException {
      // read the entire file into a byte buffer
      FileInputStream fin = new FileInputStream(f);
      ByteArrayOutputStream bout = new ByteArrayOutputStream();
      byte[] buff = new byte[256];
      while (true) {
          int n = fin.read(buff);
          if (n == -1) {
              break;
          }
          bout.write(buff, 0, n);
      }
      fin.close();
      byte[] link = bout.toByteArray();
  
      parseLink(link);
  }
  
  private void parseLink(byte[] link) {
      // get the flags byte
      byte flags = link[0x14];
  
      // get the file attributes byte
      final int file_atts_offset = 0x18;
      byte file_atts = link[file_atts_offset];
      byte is_dir_mask = (byte)0x10;
      if ((file_atts & is_dir_mask) > 0) {
          isDirectory = true;
      } else {
          isDirectory = false;
      }
  
      // if the shell settings are present, skip them
      final int shell_offset = 0x4c;
      final byte has_shell_mask = (byte)0x01;
      int shell_len = 0;
      if ((flags & has_shell_mask) > 0) {
          // the plus 2 accounts for the length marker itself
          shell_len = bytes2short(link, shell_offset) + 2;
      }
  
      // get to the file settings
      int file_start = 0x4c + shell_len;
  
      final int file_location_info_flag_offset_offset = 0x08;
      int file_location_info_flag = link[file_start + file_location_info_flag_offset_offset];
      isLocal = (file_location_info_flag & 2) == 0;
      // get the local volume and local system values
      //final int localVolumeTable_offset_offset = 0x0C;
      final int basename_offset_offset = 0x10;
      final int networkVolumeTable_offset_offset = 0x14;
      final int finalname_offset_offset = 0x18;
      int finalname_offset = link[file_start + finalname_offset_offset] + file_start;
      String finalname = getNullDelimitedString(link, finalname_offset);
      if (isLocal) {
          int basename_offset = link[file_start + basename_offset_offset] + file_start;
          String basename = getNullDelimitedString(link, basename_offset);
          real_file = basename + finalname;
      } else {
          int networkVolumeTable_offset = link[file_start + networkVolumeTable_offset_offset] + file_start;
          int shareName_offset_offset = 0x08;
          int shareName_offset = link[networkVolumeTable_offset + shareName_offset_offset]
                  + networkVolumeTable_offset;
          String shareName = getNullDelimitedString(link, shareName_offset);
          real_file = shareName + "\" + finalname;
      }
  }
  
  private static String getNullDelimitedString(byte[] bytes, int off) {
      int len = 0;
      // count bytes until the null character (0)
      while (true) {
          if (bytes[off + len] == 0) {
              break;
          }
          len++;
      }
      return new String(bytes, off, len);
  }
  
  /*
   * convert two bytes into a short note, this is little endian because it's
   * for an Intel only OS.
   */
  private static int bytes2short(byte[] bytes, int off) {
      return ((bytes[off + 1] & 0xff) << 8) | (bytes[off] & 0xff);
  }
  
  /**
   * Returns the value of the instance variable 'isLocal'.
   *
   * @return Returns the isLocal.
   */
  public boolean isLocal() {
      return isLocal;
  }
  }
  

• Java 中的 Windows 快捷方式 (.lnk) 解析器？
• http://code.google.com/p/8bits/downloads/detail?name=The_Windows_Shortcut_File_Format.pdf

• http://www.javafaq.nu/java-example-code-468.html

  public class LnkParser {
  
  public LnkParser(File f) throws IOException {
      parse(f);
  }
  
  private boolean isDirectory;
  private boolean isLocal;
  
  public boolean isDirectory() {
      return isDirectory;
  }
  
  private String real_file;
  
  public String getRealFilename() {
      return real_file;
  }
  
  private void parse(File f) throws IOException {
      // read the entire file into a byte buffer
      FileInputStream fin = new FileInputStream(f);
      ByteArrayOutputStream bout = new ByteArrayOutputStream();
      byte[] buff = new byte[256];
      while (true) {
          int n = fin.read(buff);
          if (n == -1) {
              break;
          }
          bout.write(buff, 0, n);
      }
      fin.close();
      byte[] link = bout.toByteArray();
  
      parseLink(link);
  }
  
  private void parseLink(byte[] link) {
      // get the flags byte
      byte flags = link[0x14];
  
      // get the file attributes byte
      final int file_atts_offset = 0x18;
      byte file_atts = link[file_atts_offset];
      byte is_dir_mask = (byte)0x10;
      if ((file_atts & is_dir_mask) > 0) {
          isDirectory = true;
      } else {
          isDirectory = false;
      }
  
      // if the shell settings are present, skip them
      final int shell_offset = 0x4c;
      final byte has_shell_mask = (byte)0x01;
      int shell_len = 0;
      if ((flags & has_shell_mask) > 0) {
          // the plus 2 accounts for the length marker itself
          shell_len = bytes2short(link, shell_offset) + 2;
      }
  
      // get to the file settings
      int file_start = 0x4c + shell_len;
  
      final int file_location_info_flag_offset_offset = 0x08;
      int file_location_info_flag = link[file_start + file_location_info_flag_offset_offset];
      isLocal = (file_location_info_flag & 2) == 0;
      // get the local volume and local system values
      //final int localVolumeTable_offset_offset = 0x0C;
      final int basename_offset_offset = 0x10;
      final int networkVolumeTable_offset_offset = 0x14;
      final int finalname_offset_offset = 0x18;
      int finalname_offset = link[file_start + finalname_offset_offset] + file_start;
      String finalname = getNullDelimitedString(link, finalname_offset);
      if (isLocal) {
          int basename_offset = link[file_start + basename_offset_offset] + file_start;
          String basename = getNullDelimitedString(link, basename_offset);
          real_file = basename + finalname;
      } else {
          int networkVolumeTable_offset = link[file_start + networkVolumeTable_offset_offset] + file_start;
          int shareName_offset_offset = 0x08;
          int shareName_offset = link[networkVolumeTable_offset + shareName_offset_offset]
                  + networkVolumeTable_offset;
          String shareName = getNullDelimitedString(link, shareName_offset);
          real_file = shareName + "\" + finalname;
      }
  }
  
  private static String getNullDelimitedString(byte[] bytes, int off) {
      int len = 0;
      // count bytes until the null character (0)
      while (true) {
          if (bytes[off + len] == 0) {
              break;
          }
          len++;
      }
      return new String(bytes, off, len);
  }
  
  /*
   * convert two bytes into a short note, this is little endian because it's
   * for an Intel only OS.
   */
  private static int bytes2short(byte[] bytes, int off) {
      return ((bytes[off + 1] & 0xff) << 8) | (bytes[off] & 0xff);
  }
  
  /**
   * Returns the value of the instance variable 'isLocal'.
   *
   * @return Returns the isLocal.
   */
  public boolean isLocal() {
      return isLocal;
  }
  }
  

回答by Sam Brightman

The given code works well, but has a bug. A java byte is a signed value from -128 to 127. We want an unsigned value from 0 to 255 to get the correct results. Just change the bytes2short function as follows:

给定的代码运行良好，但有一个错误。java 字节是一个从 -128 到 127 的有符号值。我们想要一个从 0 到 255 的无符号值来获得正确的结果。只需按如下方式更改 bytes2short 函数：

static int bytes2short(byte[] bytes, int off) {
    int low = (bytes[off]<0 ? bytes[off]+256 : bytes[off]);
    int high = (bytes[off+1]<0 ? bytes[off+1]+256 : bytes[off+1])<<8;
    return 0 | low | high;
}

回答by Sam Brightman

I've also worked( now have no time for that) on '.lnk' in Java. My code is here

我也在 Java 中的“.lnk”上工作过（现在没有时间）。我的代码在这里

It's little messy( some testing trash) but local and network parsing works good. Creating links is implemented too. Please test and send me patches.

它有点乱（一些测试垃圾）但本地和网络解析效果很好。创建链接也实现了。请测试并向我发送补丁。

Parsing example:

解析示例：

Shortcut scut = Shortcut.loadShortcut(new File("C:\t.lnk"));
System.out.println(scut.toString());

Creating new link:

创建新链接：

Shortcut scut = new Shortcut(new File("C:\temp"));
OutputStream os = new FileOutputStream("C:\t.lnk");
os.write(scut.getBytes());
os.flush();
os.close();

回答by Naxos84

The solution of @Code Bling does not work for me for Files in the User directory.
For Example "C:/Users/Username/Filename.txt".
The reason for that is: in The_Windows_Shortcut_File_Format.pdf

@Code Bling 的解决方案对用户目录中的文件不起作用。
例如“C:/Users/Username/Filename.txt”。
原因是：在The_Windows_Shortcut_File_Format.pdf

that was mentioned by @Stefan Cordes on page 6 it says that only the first 2 bits are important for volumes info. All other bits might be filled with random garbage when the first bit of volumes info is "0".

@Stefan Cordes 在第 6 页提到它说只有前 2 位对卷信息很重要。当卷信息的第一位为“0”时，所有其他位可能会被随机垃圾填充。

So if it comes to:

所以如果涉及到：

isLocal = (file_location_info_flag & 2) == 0;

then file_location_info_flagmight be "3". This file is still local but this line of code assigns falseto isLocal.

那么file_location_info_flag可能是“3”。这个文件仍然是本地的，但是这行代码分配false给isLocal.

So i suggest the following adjustment to @Code Bling's code:

所以我建议对@Code Bling 的代码进行以下调整：

isLocal = (file_location_info_flag & 1) == 1;

回答by Josua Frank

I can recommend this repository on GitHub:

我可以在 GitHub 上推荐这个存储库：

https://github.com/BlackOverlord666/mslinks

https://github.com/BlackOverlord666/mslinks

There I've found a simple solution to createshortcuts:

在那里我找到了一个简单的解决方案来创建快捷方式：

ShellLink.createLink("path/to/existing/file.txt", "path/to/the/future/shortcut.lnk");

ShellLink.createLink("path/to/existing/file.txt", "path/to/the/future/shortcut.lnk");

If you want to readshortcuts:

如果您想阅读快捷方式：

File shortcut = ...;
String pathToExistingFile = new ShellLink(shortcut).resolveTarget();

If you want to change the iconof the shortcut, use:

如果要更改快捷方式的图标，请使用：

ShellLink sl = ...;
sl.setIconLocation("/path/to/icon/file");

You can edit most properties of the shortcutlink such as working directory, tooltip text, icon, command line arguments, hotkeys, create links to LAN shared files and directoriesand much more...

您可以编辑快捷方式链接的大多数属性，例如工作目录、工具提示文本、图标、命令行参数、热键、创建指向 LAN 共享文件和目录的链接等等...

Hope this helps you :)

希望这对你有帮助:)

Kind regards Josua Frank

亲切的问候约书亚弗兰克

回答by JS Lair

This short code is really usefull...

这个简短的代码真的很有用...

But two fixes are needed:

但是需要两个修复：

• the isPotentialValidLink improved not to load file if name doesn't end with ".lnk"

    public static boolean isPotentialValidLink(final File file) {
      final int minimum_length = 0x64;
      boolean isPotentiallyValid = false;
      if (file.getName().toLowerCase().endsWith(".lnk"))
          try (final InputStream fis = new FileInputStream(file)) {
              isPotentiallyValid = file.isFile() && fis.available() >= minimum_length && isMagicPresent(getBytes(fis, 32));
          } catch (Exception e) {
              // forget it
          }
      return isPotentiallyValid;
    }
  

• the offset has to be computed with 32bits not only a byte...

   final int finalname_offset = bytesToDword(link,file_start + finalname_offset_offset) + file_start;
   final int basename_offset = bytesToDword(link,file_start + basename_offset_offset) + file_start;
  

• 如果名称不以“.lnk”结尾，isPotentialValidLink 改进了不加载文件

    public static boolean isPotentialValidLink(final File file) {
      final int minimum_length = 0x64;
      boolean isPotentiallyValid = false;
      if (file.getName().toLowerCase().endsWith(".lnk"))
          try (final InputStream fis = new FileInputStream(file)) {
              isPotentiallyValid = file.isFile() && fis.available() >= minimum_length && isMagicPresent(getBytes(fis, 32));
          } catch (Exception e) {
              // forget it
          }
      return isPotentiallyValid;
    }
  

• 偏移量必须用 32 位计算，而不仅仅是一个字节......

   final int finalname_offset = bytesToDword(link,file_start + finalname_offset_offset) + file_start;
   final int basename_offset = bytesToDword(link,file_start + basename_offset_offset) + file_start;