Java正则式的相关实例（1）―使用第三方包

关于正则式的概念、作用以及基础知识，这里就不多讲啦，这里给出两类实例供大家参考。其一是使用第三方包，其二是使用java API进行操作。本篇先给出第一类的实例，这里使用jakarta-oro.jar,这个包大家可以到网上down，然后添加到过程中即可。

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//1、匹配服务器日志里德IP和时间

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package hfut.wst.regExp;

import org.apache.oro.text.regex.MatchResult;
import org.apache.oro.text.regex.Pattern;
import org.apache.oro.text.regex.PatternCompiler;
import org.apache.oro.text.regex.PatternMatcher;
import org.apache.oro.text.regex.Perl5Compiler;
import org.apache.oro.text.regex.Perl5Matcher;

/**
 *
 * @author Administrator
 */
public class regularExpressionTest {

    public static void main(String[] args) {
        String logEntry = "192.168.1.1 - - [11/September/2010:10:17:30 -0500]"
                + "\"GET /IsAlive.htm HTTP/1.0\" 200 15";
        String regExp = "([0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3})\\s-\\s-\\s\\[([^\\]]+)\\]";
        try {
            PatternCompiler compiler = new Perl5Compiler();
            Pattern pattern = compiler.compile(regExp);
            PatternMatcher matcher = new Perl5Matcher();
            if(matcher.contains(logEntry, pattern)){
                MatchResult result = matcher.getMatch();
                System.out.println("    IP:"+result.group(1));
                System.out.println("  Date:"+result.group(2));
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

      
    }
}
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//匹配html font标签及其属性

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package hfut.wst.regExp;

import org.apache.oro.text.regex.MatchResult;
import org.apache.oro.text.regex.Pattern;
import org.apache.oro.text.regex.PatternCompiler;
import org.apache.oro.text.regex.PatternMatcher;
import org.apache.oro.text.regex.PatternMatcherInput;
import org.apache.oro.text.regex.Perl5Compiler;
import org.apache.oro.text.regex.Perl5Matcher;

/**
 *
 * @author Administrator
 */
public class regExpForHtmlFont {

    public static void main(String[] args) {
        String html = "<font face=\"Arial, Serif\" size=\"+2\" color=\"red\">";
        String regExpForTag = "<\\s*font\\s+([^>]*)\\s*>";
        String regExpForAttr = "([a-z]+)\\s*=\\s*\"([^\"]+)\"";
        try {
            PatternCompiler compiler = new Perl5Compiler();
            Pattern patternForTag = compiler.compile(regExpForTag, Perl5Compiler.CASE_INSENSITIVE_MASK);
            Pattern patternForAttr = compiler.compile(regExpForAttr, Perl5Compiler.CASE_INSENSITIVE_MASK);
            PatternMatcher matcher = new Perl5Matcher();
            if(matcher.contains(html, patternForTag)){
                MatchResult result = matcher.getMatch();
                String attr = result.group(1);
                System.out.println("Hello, Match Successfully!!");
                System.out.println(attr);
                PatternMatcherInput input = new PatternMatcherInput(attr);
                while(matcher.contains(input, patternForAttr)){
                    MatchResult resultTemp = matcher.getMatch();
                    System.out.println(resultTemp.group(1)+"="+resultTemp.group(2));
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}