这是一个从网页源文件中得到链接的实现代码，和大家分享一下：

import Java.net.*;
import Java.io.*;
import Java.util.*;

class ScanPage{
private static String strPage;
private String strUrl;
private String fileName;
public void setURL(String strUrl){
this.strUrl=strUrl;
}
//从地址中得到文件名
public void setFileName(){
int i;
char ch;
i=strUrl.length();
ch=strUrl.charAt(--i);
while(ch!=’/’ && ch>0)
ch=strUrl.charAt(--i);
fileName=strUrl.substring(i);
}
//下载网页
public void downFile()throws IOException{
URL url =new URL(strUrl);
InputStream is =url.openStream();
OutputStream os =new FileOutputStream(fileName);
byte[] buffer =new byte[512];
int len;
while((len =is.read(buffer))!=-1)
os.write(buffer,0,len);
is.close();
os.close();
}
//读文件
public void readFile() throws IOException {
StringBuffer sb = new StringBuffer();
BufferedReader in =new BufferedReader(new FileReader(fileName));
String s;

while((s = in.readLine()) != null) {
sb.append(s);
sb.append("\n");
}
in.close();
strPage=sb.toString();
}
public String getTitle(){

return "";
}