Parse an Apache log file with StringTokenizer : String Operation « Regular Expressions « Java

Java
1. 2D Graphics GUI
2. 3D
3. Advanced Graphics
4. Ant
5. Apache Common
6. Chart
7. Class
8. Collections Data Structure
9. Data Type
10. Database SQL JDBC
11. Design Pattern
12. Development Class
13. EJB3
14. Email
15. Event
16. File Input Output
17. Game
18. Generics
19. GWT
20. Hibernate
21. I18N
22. J2EE
23. J2ME
24. JDK 6
25. JNDI LDAP
26. JPA
27. JSP
28. JSTL
29. Language Basics
30. Network Protocol
31. PDF RTF
32. Reflection
33. Regular Expressions
34. Scripting
35. Security
36. Servlets
37. Spring
38. Swing Components
39. Swing JFC
40. SWT JFace Eclipse
41. Threads
42. Tiny Application
43. Velocity
44. Web Services SOA
45. XML
Java Tutorial
Java Source Code / Java Documentation
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Java » Regular Expressions » String OperationScreenshots 
Parse an Apache log file with StringTokenizer
Parse an Apache log file with StringTokenizer
   

/*
 * Copyright (c) Ian F. Darwin, http://www.darwinsys.com/, 1996-2002.
 * All rights reserved. Software written by Ian F. Darwin and others.
 * $Id: LICENSE,v 1.8 2004/02/09 03:33:38 ian Exp $
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 
 * Java, the Duke mascot, and all variants of Sun's Java "steaming coffee
 * cup" logo are trademarks of Sun Microsystems. Sun's, and James Gosling's,
 * pioneering role in inventing and promulgating (and standardizing) the Java 
 * language and environment is gratefully acknowledged.
 
 * The pioneering role of Dennis Ritchie and Bjarne Stroustrup, of AT&T, for
 * inventing predecessor languages C and C++ is also gratefully acknowledged.
 */

import java.util.*;

/**
 * Parse an Apache log file with StringTokenizer
 */
public class LogStrTok implements LogExample {
  public static void main(String argv[]) {

    StringTokenizer matcher = new StringTokenizer(logEntryLine);

    System.out.println("tokens = " + matcher.countTokens());
    // StringTokenizer CAN NOT count if you are changing the delimiter!
    // if (matcher.countTokens() != NUM_FIELDS) {
    //   System.err.println("Bad log entry (or bug in StringTokenizer?):");
    //   System.err.println(logEntryLine);
    // }

    System.out.println("Hostname: " + matcher.nextToken());
    // StringTokenizer makes you ask for tokens in order to skip them:
    matcher.nextToken()// eat the "-"
    matcher.nextToken()// again
    System.out.println("Date/Time: " + matcher.nextToken("]"));
    //matcher.nextToken(" "); // again
    System.out.println("Request: " + matcher.nextToken("\""));
    matcher.nextToken(" ")// again
    System.out.println("Response: " + matcher.nextToken());
    System.out.println("ByteCount: " + matcher.nextToken());
    System.out.println("Referer: " + matcher.nextToken("\""));
    matcher.nextToken(" ")// again
    System.out.println("User-Agent: " + matcher.nextToken("\""));
  }
}
/**
 * Common fields for Apache Log demo.
 */
interface LogExample {
  /** The number of fields that must be found. */
  public static final int NUM_FIELDS = 9;

  /** The sample log entry to be parsed. */
  public static final String logEntryLine = "123.45.67.89 - - [27/Oct/2000:09:27:09 -0400] \"GET /java/javaResources.html HTTP/1.0\" 200 10450 \"-\" \"Mozilla/4.6 [en] (X11; U; OpenBSD 2.8 i386; Nav)\"";

}

           
         
    
    
  
Related examples in the same category
1. Regular expression: Split DemoRegular expression: Split Demo
2. Replacing String Tokenizer Replacing String Tokenizer
3. String replaceString replace
4. String splitString split
5. Simple splitSimple split
6. Calculating Word Frequencies with Regular Expressions
7. Print all the strings that match a given pattern from a filePrint all the strings that match a given pattern from a file
8. Quick demo of Regular Expressions substitutionQuick demo of Regular Expressions substitution
9. StringConvenience -- demonstrate java.lang.String convenience routineStringConvenience -- demonstrate java.lang.String convenience routine
10. Split a String into a Java Array of Strings divided by an Regular ExpressionsSplit a String into a Java Array of Strings divided by an Regular Expressions
11. Regular Expression Replace
12. Java Regular Expression : Split text
13. Java Regular Expression :split 2
14. Get all digits from a string
15. Strip extra spaces in a XML string
16. Remove trailing white space from a string
17. Create a string search and replace using regex
18. Split-up string using regular expression
19. Apply proper uppercase and lowercase on a String
20. Regular Expression Search and Replace Program
21. Searching and Replacing with Nonconstant Values Using a Regular Expression
22. Use Matcher.appendReplacement() to match [a-zA-Z]+[0-9]+
23. Ignore case differences when searching for or replacing substrings.
24. Use replaceAll() to ignore case when replacing one substring with another
25. Extract a substring by matching a regular expression.
26. Match string ends
27. Match words
28. Match punct
29. Match space
30. Determining If a String Matches a Pattern Exactly
31. Removing Duplicate Whitespace in a String
32. Split the supplied content into lines, returning each line as an element in the returned list.
33. Get First Found regex
34. Get Found regex
35. Get First Not Empty String in a String list
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.