Java 解析 lnk 快捷方式文件的方法，javalnk,lnk 是 Window

Java 解析 lnk 快捷方式文件的方法，javalnk,lnk 是 Window

lnk 是 Windows 系统中的快捷方式文件，本例子是 Java 对这种文件的解析。

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;    }    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 settings        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);    }    /*    static int norm(byte b) {        if(b < 0) {            b+=128;        }        return b;    }    static int bytes2int(byte[] arr, int off) {        int b1 = norm(arr[off]);        int b2 = norm(arr[off+1]);        int b3 = norm(arr[off+2]);        int b4 = norm(arr[off+3]);        int val =  (                    (b1 << 0) |                    (b2 << 8) |                    (b3 << 16) |                    (b4 << 24)                    );        //p("bytes2int: " + b1 + " " + b2 + " " + b3 + " " + b4);        return val;    }    static NumberFormat num_format = new DecimalFormat(" 000;-000");    public static String padd(String str, int len) {        while(str.length() < len) {            str = " " + str;        }        return str;    }    public static void pw(byte[] arr, int off) {        StringBuffer top = new StringBuffer();        StringBuffer mid = new StringBuffer();        StringBuffer bot = new StringBuffer();        top.append("--");        mid.append("  ");        bot.append("  ");        for(int i=0; i<16; i++) {            int val = arr[off+i];            String str = Integer.toHexString(off+i);            top.append(padd(str,5));            mid.append(padd(""+val,5));            if(val < 0) {                val += 128;            }            if(val >= ' ' && val <= '~') {                str = "" + (char)val;            } else {                str = Integer.toHexString(val);            }            str = padd(str,5);            bot.append(str);            if(i%4==3) {                top.append("    ");                mid.append("    ");                bot.append("    ");            }        }        p(top.toString());        p(mid.toString());        p(bot.toString());    }    public static void pbits(byte bt) {        p("byte = " + bt + " " + Integer.toHexString(bt) + " " + Integer.toBinaryString(bt));    }*/    public static void p(String str) {        System.out.println(str);    }}//该片段来自于http://byrx.net