在Java中读取日志文件 [英] reading log file in java
本文介绍了在Java中读取日志文件的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
是否可以使用Java读取日志文件(abc.log)?
Is it possible to read log files (abc.log) using java?
我要从我的日志文件中输入特定的字符串.
I want a specific string from my log file.
假设这是我的日志文件的内容.我只想要时间戳记(例如:05:08:37),然后将其打印在控制台上.
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
推荐答案
您可以将日志文件"读取为普通文件.
You can read your "log-file" as a normal file.
然后,您可以使用正则表达式来获取您需要的字符串部分:
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());
}
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