public static void main(String[] args) throws IOException {

        // TODO Auto-generated method stub

//        List<String> list= getEmail();

        List<String> list= getEmailFromWeb();

        for (String string : list) {

            System.out.println(string);

        }

    }

    public static List<String> getEmail() throws IOException{

        //1.读取源文件

        BufferedReader bufferedReader= new BufferedReader(new FileReader("G:\\index.htm"));

        //2.对读取的数据进行规则的匹配

        String regex_email= "\\w+@\\w+(\\.[a-zA-Z]{2,3}){1,3}";//xinwenge@vip.qq.com

        Pattern pattern= Pattern.compile(regex_email);

        String line = null;

        List<String> list= new ArrayList<>();

        while ((line= bufferedReader.readLine())!=null) {

            Matcher matcher= pattern.matcher(line);

            while (matcher.find()) {

                list.add(matcher.group());

            }

        }

        return list;

    }

public static List<String> getEmailFromWeb() throws IOException{

    //1.读取web源文件

    URL url= new URL("http://news.qq.com/zt2015/wxghz/index.htm");

    BufferedReader bufferedReader= new BufferedReader(new InputStreamReader(url.openStream()));

    //2.对读取的数据进行规则的匹配

    String regex_email= "\\w+@\\w+(\\.[a-zA-Z]{2,3}){1,2}";

    Pattern pattern= Pattern.compile(regex_email);

    String line = null;

    List<String> list= new ArrayList<>();

    while ((line= bufferedReader.readLine())!=null) {

        Matcher matcher= pattern.matcher(line);

        while (matcher.find()) {

            list.add(matcher.group());

        }

    }

    return list;

    }