jsp获取某网站所有链接地址

<%@ page contentType="text/html; charset=gb2312" language="java"
import="java.util.regex.*" errorPage=""%>
<%
String sCurrentLine;
String sTotalString;
sCurrentLine = "";
sTotalString = "";
java.io.InputStream l_urlStream;
java.net.URL l_url = new java.net.URL("http://www.baidu.com");
java.net.HttpURLConnection l_connection = (java.net.HttpURLConnection) l_url
.openConnection();
l_connection.connect();
l_urlStream = l_connection.getInputStream();
java.io.BufferedReader l_reader = new java.io.BufferedReader(
new java.io.InputStreamReader(l_urlStream));

while ((sCurrentLine = l_reader.readLine()) != null) {
sTotalString += sCurrentLine;
}
//String regEx = "href=([^/"']*)>";
String regEx = "href=/"([^/"]*)/"";//找出href="****"的链接
Pattern p = Pattern.compile(regEx, Pattern.CASE_INSENSITIVE);
Matcher m = p.matcher(sTotalString);
int j = 0;
while (m.find()) {
j++;
out.println("m.group(" + j + "): " + m.group(0) + "<br>");
}
regEx = "href='([^']*)'";//找出href='****'的链接
p = Pattern.compile(regEx, Pattern.CASE_INSENSITIVE);//Pattern.CASE_INSENSITIVE查找忽略大小写
m = p.matcher(sTotalString);
while (m.find()) {
j++;
out.println("m.group(" + j + "): " + m.group(0) + "<br>");
}

%>