如何从网页中爬回邮件 - 黑马程序员技术交流社区

package day23;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class DatagramSocket1 {
public static void main(String[] args)throws Exception{
URL url=new URL("http:\\192.168.1.3:8080\\a.txt");//封装网页
String reg="\\w+@\\w+(\\.\\w+)+";
Pattern p=Pattern.compile(reg);//将正则表达式编译到模式中
URLConnection conn=url.openConnection();
BufferedReader br=new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line=null;
while((line=br.readLine())!=null){
Matcher m=p.matcher(line);
while(m.find()){
System.out.println(m.group());
}
}
}
}

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