Java小程序抓取网页中的Email地址

java小程序：抓取网页中的Email地址，去重，打印。

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


public class test2 {
	public static void main(String[] args) {
		try {
			BufferedReader br=new BufferedReader(new FileReader("D:\\TDDOWNLOAD\\showtopic-54449.html"));
			String line="";
			while((line=br.readLine())!=null){
				pr(line);
			}
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	public static void pr(String aa) {
		Pattern pattern=Pattern.compile("[a-zA-Z0-9_-]+@[a-zA-Z0-9_-]+(\\.[a-zA-Z0-9_-]+)+");
		Matcher matcher=pattern.matcher(aa);
		Map<String, String> emailMap=new HashMap<String, String>();
		while (matcher.find()) {
			emailMap.put(matcher.group(), matcher.group());
		}
		Iterator<String> iterator=emailMap.values().iterator();
		while (iterator.hasNext()) {
			System.out.println(iterator.next());
		}
	}
}