Search a string in a file and write the matched lines to another file in Java
- by Geeta
For searching a string in a file and writing the lines with matched string to another
file it takes 15 - 20 mins for a single zip file of 70MB(compressed state).
Is there any ways to minimise it.
my source code:
getting Zip file entries
zipFile = new ZipFile(source_file_name);
entries = zipFile.entries();
while (entries.hasMoreElements())
{ ZipEntry entry = (ZipEntry)entries.nextElement();
if (entry.isDirectory())
{
continue;
}
searchString(Thread.currentThread(),entry.getName(), new BufferedInputStream (zipFile.getInputStream(entry)), Out_File, search_string, stats); }
zipFile.close();
Searching String
public void searchString(Thread CThread, String Source_File, BufferedInputStream in, File outfile, String search, String stats) throws IOException
{
int count = 0;
int countw = 0;
int countl = 0;
String s;
String[] str;
BufferedReader br2 = new BufferedReader(new InputStreamReader(in));
System.out.println(CThread.currentThread());
while ((s = br2.readLine()) != null)
{
str = s.split(search);
count = str.length - 1;
countw += count; //word count
if (s.contains(search))
{
countl++; //line count
WriteFile(CThread,s, outfile.toString(), search);
}
}
br2.close();
in.close();
}
--------------------------------------------------------------------------------
public void WriteFile(Thread CThread,String line, String out, String search) throws IOException
{
BufferedWriter bufferedWriter = null;
System.out.println("writre thread"+CThread.currentThread());
bufferedWriter = new BufferedWriter(new FileWriter(out, true));
bufferedWriter.write(line);
bufferedWriter.newLine();
bufferedWriter.flush();
}
Please help me. Its really taking 40 mins for 10 files using threads and 15 - 20 mins for a single file of 70MB after being compressed. Any ways to minimise the time.
