📄 poodle.java
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package com.ronsoft.books.nio.regex;import java.util.regex.Pattern;import java.util.List;import java.util.LinkedList;/** * Demonstrate behavior of splitting strings. The XML output created * here can be styled into HTML or some other useful form. * See poodle.xsl. * * Created: April, 2002 * @author Ron Hitchens (ron@ronsoft.com) * @version $Id: Poodle.java,v 1.3 2002/05/01 03:47:07 ron Exp $ */public class Poodle{ /** * Generate a matrix table of how Pattern.split() behaves with * various regex patterns and limit values. */ public static void main (String [] argv) throws Exception { String input = "poodle zoo"; Pattern space = Pattern.compile (" "); Pattern d = Pattern.compile ("d"); Pattern o = Pattern.compile ("o"); Pattern [] patterns = { space, d, o }; int limits [] = { 1, 2, 5, -2, 0 }; // Use supplied args, if any. Assume args are good. // Usage: input pattern [pattern ...] // Don't forget to quote the args. if (argv.length != 0) { input = argv [0]; patterns = collectPatterns (argv); } generateTable (input, patterns, limits); } /** * Output a simple XML document with the results of applying * the list of regex patterns to the input with each of the * limit values provided. I should probably use the JAX APIs * to do this, but I want to keep the code simple. */ private static void generateTable (String input, Pattern [] patterns, int [] limits) { System.out.println ("<?xml version='1.0'?>"); System.out.println ("<table>"); System.out.println ("\t<row>"); System.out.println ("\t\t<head>Input: " + input + "</head>"); for (int i = 0; i < patterns.length; i++) { Pattern pattern = patterns [i]; System.out.println ("\t\t<head>Regex: <value>" + pattern.pattern() + "</value></head>"); } System.out.println ("\t</row>"); for (int i = 0; i < limits.length; i++) { int limit = limits [i]; System.out.println ("\t<row>"); System.out.println ("\t\t<entry>Limit: " + limit + "</entry>"); for (int j = 0; j < patterns.length; j++) { Pattern pattern = patterns [j]; String [] tokens = pattern.split (input, limit); System.out.print ("\t\t<entry>"); for (int k = 0; k < tokens.length; k++) { System.out.print ("<value>" + tokens [k] + "</value>"); } System.out.println ("</entry>"); } System.out.println ("\t</row>"); } System.out.println ("</table>"); } /** * If command line args were given, compile all args after the * first as a Pattern. Return an array of Pattern objects. */ private static Pattern [] collectPatterns (String [] argv) { List list = new LinkedList(); for (int i = 1; i < argv.length; i++) { list.add (Pattern.compile (argv [i])); } Pattern [] patterns = new Pattern [list.size()]; list.toArray (patterns); return (patterns); }}⌨️ 快捷键说明
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