让文件对话框真正支持Windows快捷方式，windows快捷方式,public class

让文件对话框真正支持Windows快捷方式，windows快捷方式,public class

public class LnkParser {        public LnkParser(File f) throws Exception {            parse(f);        }        public 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 fileatts = link[file_atts_offset];    byte is_dir_mask = (byte)0x10;    if((fileatts & is_dir_mask) > 0) {        is_dir = true;    } else {        is_dir = false;    }    // if the shell settings are present, skip them    final int shell_offset = 0x4c;    int shell_len = 0;    if((flags & 0x1) > 0) {    // the plus 2 accounts for the length marker itself    shell_len = bytes2short(link,shell_offset) + 2;  }    // get to the file block    int file_start = 0x4c + shell_len;    // get the local volume and local system values    int local_sys_off = link[file_start+0x10] + file_start;    real_file = getNullDelimitedString(link,local_sys_off);    p("real filename = " + real_file);}    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.        static int bytes2short(byte[] bytes, int off) {            return bytes[off] | (bytes[off+1]<<8);            }    private boolean is_dir;    public boolean isDirectory() {        return is_dir;    }    private String real_file;    public String getRealFilename() {    return real_file;    }}    public class ShortcutFileSystemView extends FileSystemView {    public Boolean isTraversable(File f) {        if(isDirLink(f)) {            return new Boolean(true);        }        return super.isTraversable(f);    }    public File[] getFiles(File dir, boolean useFileHiding) {        if(isDirLink(dir)) {            dir = getRealFile(dir);        }        return super.getFiles(dir,useFileHiding);    }    private boolean isDirLink(File f) {        try {            if(f.getName().toLowerCase().endsWith(".lnk")) {                if(new LnkParser(f).isDirectory()) {                return true;                }            }        } catch (Exception ex) {            System.out.println("ex: " + ex);            ex.printStackTrace();        }        return false;    }    private File getRealFile(File file) {        try {            return new File(new LnkParser(file).getRealFilename());        } catch (Exception ex) {            System.out.println("ex: " + ex);            ex.printStackTrace();            return null;        }    }    public boolean isDirLink(File f) {        try {            if(f.getName().toLowerCase().endsWith(".lnk")) {             LnkParser parser = new LnkParser(f);                        if(parser.isDirectory()) {                return true;            }        }    } catch (Exception ex) {                System.out.println("exception: " + ex.getMessage());         ex.printStackTrace();    }    return false; }}    public class ShortcutTest {        public static void main(String[] args) throws Exception {             FileSystemView fsv = new ShortcutFileSystemView();             JFileChooser chooser = new JFileChooser();             chooser.setFileSystemView(fsv);                    chooser.setFileView(new ShortcutFileView());             chooser.showOpenDialog(null);        }    }//该片段来自于http://byrx.net