package cn.zhangzong.test;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.URL;

import java.net.URLConnection;

import java.util.regex.Matcher;

import java.util.regex.Pattern;

/**

 * 正则抓取邮箱

 * @author happy

 *

 */

public class Test {

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

     //1.1   创建一个url对象

      URL url = new URL("https://www.douban.com/group/topic/8845032/");

     //1.2  打开连接

      URLConnection conn = url.openConnection();

     //1.3  设置连接网络超时时间   单位为毫秒

      conn.setConnectTimeout(1000 * 10);

     //1.4  通过流 操作读取指定网络地址中的文件

      BufferedReader bufr = new BufferedReader(new InputStreamReader(conn.getInputStream()));

      String line = null;

     //1.5 匹配email的正则

      String regex = "[a-zA-Z0-9_-]+@\\w+\\.[a-z]+(\\.[a-z]+)?";

     //1.6 使用模式的compile()方法生成模式对象

      Pattern p = Pattern.compile(regex);

     //1.7 遍历打印

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

          Matcher m = p.matcher(line);

          while(m.find()) {

              System.out.println(m.group());// 获得匹配的email

          }

      }

  }

}