Searching for a sequence of Bytes in a Binary File with Java

Question

I have a sequence of bytes that I have to search for in a set of Binary files using Java.

Example: I\'m searching for the byte sequence DEADBEEF (in hex

Answer 1

You can find sequence of bytes from giga-bytes order file using bigdoc.

Lib and Example here on Github at: https://github.com/riversun/bigdoc

package org.example;

import java.io.File;
import java.util.List;

import org.riversun.bigdoc.bin.BigFileSearcher;

public class Example {

    public static void main(String[] args) throws Exception {

        byte[] searchBytes = "hello world.".getBytes("UTF-8");

        File file = new File("/var/tmp/yourBigfile.bin");

        BigFileSearcher searcher = new BigFileSearcher();

        List findList = searcher.searchBigFile(file, searchBytes);

        System.out.println("positions = " + findList);
    }
}

If you want to search it on memory,check this. Examples here on Github at: https://github.com/riversun/finbin

 import java.util.List;

 import org.riversun.finbin.BigBinarySearcher;

 public class Example {

     public static void main(String[] args) throws Exception {

         BigBinarySearcher bbs = new BigBinarySearcher();

         byte[] iamBigSrcBytes = "Hello world.It's a small world.".getBytes("utf-8");

         byte[] searchBytes = "world".getBytes("utf-8");

         List indexList = bbs.searchBytes(iamBigSrcBytes, searchBytes);

         System.out.println("indexList=" + indexList);
     }
 }

Returns all the matched positions in the array of bytes

It also can withstand a large array of bytes:)