可以去看看horstmann写得core java Volum I 第12章最后一节Regular Expressions： import java.io.*; import java.net.*; import java.util.regex.*; /** This program displays all URLs in a web page by matching a regular expression that describes the <a href=...> HTML tag. Start the program as java HrefMatch URL */ public class HrefMatch { public static void main(String[] args) { try { // get URL string from command line or use default String urlString; if (args.length > 0) urlString = args[0]; else urlString = "http://java.sun.com"; // open reader for URL InputStreamReader in = new InputStreamReader(new URL(urlString).openStream()); // read contents into string buffer StringBuilder input = new StringBuilder(); int ch; while ((ch = in.read()) != -1) input.append((char) ch); // search for all occurrences of pattern String patternString = "<a\\s+href\\s*=\\s*(\"[^\"]*\"|[^\\s>])\\s*>"; Pattern pattern = Pattern.compile(patternString, Pattern.CASE_INSENSITIVE); Matcher matcher = pattern.matcher(input); while (matcher.find()) { int start = matcher.start(); int end = matcher.end(); String match = input.substring(start, end); System.out.println(match); } } catch (IOException e) { e.printStackTrace(); } catch (PatternSyntaxException e) { e.printStackTrace(); } } }
import java.net.*;
import java.util.regex.*; /**
This program displays all URLs in a web page by
matching a regular expression that describes the
<a href=...> HTML tag. Start the program as
java HrefMatch URL
*/
public class HrefMatch
{
public static void main(String[] args)
{
try
{
// get URL string from command line or use default
String urlString;
if (args.length > 0) urlString = args[0];
else urlString = "http://java.sun.com"; // open reader for URL
InputStreamReader in = new InputStreamReader(new URL(urlString).openStream()); // read contents into string buffer
StringBuilder input = new StringBuilder();
int ch;
while ((ch = in.read()) != -1) input.append((char) ch); // search for all occurrences of pattern
String patternString = "<a\\s+href\\s*=\\s*(\"[^\"]*\"|[^\\s>])\\s*>";
Pattern pattern = Pattern.compile(patternString, Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher(input); while (matcher.find())
{
int start = matcher.start();
int end = matcher.end();
String match = input.substring(start, end);
System.out.println(match);
}
}
catch (IOException e)
{
e.printStackTrace();
}
catch (PatternSyntaxException e)
{
e.printStackTrace();
}
}
}
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB2312" />
<title>正则表达式</title>
<script language="JavaScript" type="text/javascript">
function regexp_str(){var regexpStr=new RegExp(document.getElementsByName("regexp").item(0).value); //建立正则对象
var getStr=document.getElementsByName("str").item(0).value; //取得输入的文本值var target = getStr.match(regexpStr) ;document.getElementsByName("strTarget").item(0).value = target ;var info = ""
if(regexpStr.test(getStr)) //正则对象的test方法,匹配返回true,否则返回false)
info = "输入的字符串："+getStr+" 包含模式："+regexpStr.source ; //正则对象的source属性,返回正则对象设置的匹配值
else
info = "输入的字符串："+getStr+" 不包含模式："+regexpStr.source;document.getElementsByName("strInfo").item(0).value = info ;var strReplace = document.getElementsByName("strReplace").item(0).value ;
if(regexpStr.test(getStr)) {
var regStr=new RegExp(document.getElementsByName("regexp").item(0).value,"g");
document.getElementsByName("afterReplaced").item(0).value = getStr.replace(regStr,strReplace) ;
}}
</script></head>
<body>
<h3 align=center>------正则表达式测试------</h3>
<hr>
<FORM METHOD=POST ACTION="">
  请输入模式: <input type="text" name="regexp" size=120 ><br>
请输入字符串: <input type="text" name="str" size=120><br>
匹配的字串是: <input type="text" name="strTarget" size=120><br>
其 他 信 息 : <input type="text" name="strInfo" size=120 ><br>
要替换的子串: <input type="text" name="strReplace" size=120><br>
替换后的子串: <input type="text" name="afterReplaced" size=120><br>
<input type="button" value="查询" onclick="regexp_str();">
<input type="reset" value="重置" onclick="regexp_str();">
</FORM>
</body>
</html>将这个保存为html文件
然后就可以用来匹配了