Created
September 17, 2010 03:24
-
-
Save shaobin0604/583611 to your computer and use it in GitHub Desktop.
WordMemo index generator
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
package com.example; | |
import java.io.FileNotFoundException; | |
import java.io.IOException; | |
import java.io.RandomAccessFile; | |
public class IndexGen { | |
private static final byte CR = 0x0D; | |
private static final byte LF = 0x0A; | |
public static void main(String[] args) { | |
RandomAccessFile in = null; | |
RandomAccessFile out = null; | |
try { | |
in = new RandomAccessFile("tofel-word.csv", "r"); | |
out = new RandomAccessFile("tofel-word.csv.idx", "rw"); | |
long lastPos = 0; | |
long position = 0; | |
long length = in.length(); | |
while ((position = in.getFilePointer()) < length) { | |
byte byte1 = (byte) in.readByte(); | |
if (CR == byte1) { | |
if (in.getFilePointer() < length) { | |
byte byte2 = (byte) in.readByte(); | |
if (LF == byte2) { | |
out.writeLong(lastPos); | |
out.writeLong(position - lastPos); | |
lastPos = position + 2; | |
} | |
} | |
} | |
} | |
} catch (FileNotFoundException e) { | |
// TODO Auto-generated catch block | |
e.printStackTrace(); | |
} catch (IOException e) { | |
// TODO Auto-generated catch block | |
e.printStackTrace(); | |
} finally { | |
if (in != null) | |
try { | |
in.close(); | |
} catch (IOException e1) { | |
// TODO Auto-generated catch block | |
e1.printStackTrace(); | |
} | |
if (out != null) | |
try { | |
out.close(); | |
} catch (IOException e) { | |
// TODO Auto-generated catch block | |
e.printStackTrace(); | |
} | |
} | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment