Java中的Windows快捷方式（.lnk）parsing器？

添加评论（一些解释，以及信贷给每个贡献者），额外的文件魔法检查，一个快速测试，看看给定的文件可能是一个有效的链接（不读所有的字节），抛出一个修复一个ParseException与适当的消息，而不是ArrayIndexOutOfBoundsException如果文件太小，做了一些一般的清理。

来源（如果你有任何改变，把他们推到GitHub 回购 / 项目 。

 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 &lt;jessehager@iname.com&gt; * 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); } } 

以上解决方案仅适用于本地文件。 我添加了对网络文件的支持：

• 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; } } 

我也在Java的'.lnk'上工作（现在没时间了）。 我的代码在这里

这是有点混乱（一些测试垃圾），但本地和网络解析工程很好。 创建链接也是实现的。 请测试并发送补丁。

解析示例：

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

创建新的链接：

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

链接到代码plan9assembler似乎工作与小的修改。 我认为这只是“ & 0xff ”来防止当byte被上传到需要改变的bytes2short函数中的int时的符号扩展。 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“路径名的最后部分”，尽管实际上这似乎并没有用在我的例子中。 我没有添加任何错误检查头或处理网络共享。 这是我现在使用的：

 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); } } 

我可以在GitHub上推荐这个仓库：

https://github.com/BlackOverlord666/mslinks

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");

如果你想阅读快捷方式：

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

如果要更改快捷方式的图标 ，请使用：

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

您可以编辑快捷键链接的大多数属性，如工作目录，工具提示文本，图标，命令行参数，热键，创建LAN共享文件和目录的链接等等。

希望这可以帮助你:)

亲切的问候Josua弗兰克

给定的代码工作正常，但有一个错误。 java字节是从-128到127的有符号值。我们想要一个从0到255的无符号值来得到正确的结果。 只需更改bytes2short函数，如下所示：

 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; } 

@Code Bling的解决方案不适用于我的用户目录中的文件。
例如“C：/Users/Username/Filename.txt”。
原因是：在The_Windows_Shortcut_File_Format.pdf中

这是由@Stefan Cordes在第6页提到的，它说只有前2位对于音量信息很重要。 当卷信息的第一位是“0”时，所有其他位可能被随机垃圾填充。

所以如果涉及到：

 isLocal = (file_location_info_flag & 2) == 0; 

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

所以我建议以下调整@Code Bling的代码：

 isLocal = (file_location_info_flag & 1) == 1;