添加了注释（到目前为止有一些说明以及对每个贡献者的感谢），对文件魔术的附加检查，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），进行了抛出的修复如果文件太小，则使用适当的消息而不是ArrayIndexOutOfBoundsException的ParseException进行一些常规清理。
在此处提供源代码（如果有任何更改，请将其直接推到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;public class WindowsShortcut{ private boolean isDirectory; private boolean isLocal; private String real_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(); } } public String getRealFilename() { return real_file; } public boolean isLocal() { return isLocal; } public boolean isDirectory() { return isDirectory; } private static byte[] getBytes(InputStream in) throws IOException { return getBytes(in, null); } 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; } 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); } 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); }}
