Is it possible to read log files (abc.log) using java?
I want a specific string from my log file.
suppose this is the content of my logfile. I want the time stamp only (eg: 05:08:37) and print it the console.
2012-12-16 05:08:37,905 [Thread-1] INFO com.submit.SubmitService - Wait time 500
2012-12-16 05:08:38,444 [Thread-1] INFO com.submit.SubmitService - NO OF RECORDS TILL NOW 3755 TOTAL TIME -- << 539
2012-12-16 05:08:38,668 [Thread-1] INFO com.submit.SubmitService - Active Connection:: -69076
2012-12-16 05:08:38,670 [Thread-1] INFO com.submit.SubmitService - Active Connection:: -65764
You can read your "log-file" as a normal file.
Then you can use, for instance, regular expression, to obtain the part of the string that you need:
try{
FileInputStream fstream = new FileInputStream("abc.log");
BufferedReader br = new BufferedReader(new InputStreamReader(fstream));
String strLine;
/* read log line by line */
while ((strLine = br.readLine()) != null) {
/* parse strLine to obtain what you want */
System.out.println (strLine);
}
fstream.close();
} catch (Exception e) {
System.err.println("Error: " + e.getMessage());
}