Java获取网页源代码中得所有链接 正则表达式法[zz]

package catch_url;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Urls {
private String startUrl; // 开始采集网址

String urlContent;

String ContentArea;

private String strAreaBegin, strAreaEnd; // 采集区域开始采集字符串和结束采集字符串


private String stringInUrl, stringNotInUrl;

String strContent;// 获得的采集内容

String[] allUrls; // 采集到的所有网址

private String regex; // 采集规则

UrlAndTitle urlAndTitle = new UrlAndTitle(); // 存储网址和标题

public static void main(String[] args)
{
Urls myurl = new Urls("<body", "/body>");
myurl.getStartUrl("http://www.126.com/");
myurl.getUrlContent();
myurl.getContentArea();
myurl.getStringInUrl("http://www.126.com/");
myurl.getStringNotInUrl("google");
myurl.Urls();

}

// 初始化构造函数 strAreaBegin 和strAreaEnd

public Urls(String strAreaBegin, String strAreaEnd) {
this.strAreaBegin = strAreaBegin;
this.strAreaEnd = strAreaEnd;
}

//
public void Urls()
{
int i = 0;
// String regex ="<a
// href="?'?http://[a-zA-Z0-9]+\.[a-zA-Z0-9]+\.[a-zA-Z]+/?[\.?[\S|\s]]+[a>]$";
final String regex = "<a.*?/a>";
// String regex ="http://.*?>";
final Pattern pt = Pattern.compile(regex);
final Matcher mt = pt.matcher(ContentArea);
while (mt.find()) {
   System.out.println(mt.group());
   i++;

   // 获取标题
   final Matcher title = Pattern.compile(">.*?</a>").matcher(mt.group());
   while (title.find()) {
    System.out.println("标题:"
      + title.group().replaceAll(">|</a>", ""));
   }

   // 获取网址
   final Matcher myurl = Pattern.compile("href=.*?>").matcher(mt.group());
   while (myurl.find()) {
    System.out.println("网址:"
      + myurl.group().replaceAll("href=|>", ""));
   }

   System.out.println();

}

System.out.println("共有" + i + "个符合结果");

}

// 获得开始采集网址
public void getStartUrl(String startUrl)
{
this.startUrl = startUrl;
}

// 获得网址所在内容;
public void getUrlContent()
{

StringBuffer is = new StringBuffer();
try {
   URL myUrl = new URL(startUrl);
   BufferedReader br = new BufferedReader(new InputStreamReader(myUrl
     .openStream()));

   String s;
   while ((s = br.readLine()) != null) {
    is.append(s);
   }
   urlContent = is.toString();
} catch (Exception e)

{
   System.out.println("网址文件未能输出");
   e.printStackTrace();
}

}

// 获得网址所在的匹配区域部分
public void getContentArea()
{
int pos1 = 0, pos2 = 0;
pos1 = urlContent.indexOf(strAreaBegin) + strAreaBegin.length();
pos2 = urlContent.indexOf(strAreaEnd, pos1);
ContentArea = urlContent.substring(pos1, pos2);
}

// 以下两个函数获得网址应该要包含的关键字及不能包含的关键字
// 这里只做初步的实验。后期，保护的关键字及不能包含的关键字应该是不只一个的。
public void getStringInUrl(String stringInUrl)
{
this.stringInUrl = stringInUrl;

}

public void getStringNotInUrl(String stringNotInUrl)
{
this.stringNotInUrl = stringNotInUrl;
}

// 获取采集规则

// 获取url网址
public void getUrl()
{

}

public String getRegex()
{
return regex;

}

class UrlAndTitle {
String myURL;

String title;
}
}