Java模拟登录系统抓取内容【转载】

没有看考勤的习惯，导致我的一天班白上了，都是钱啊，系统也不发个邮件通知下。。。。
     为了避免以后还有类似状况特别写了个java模拟登录抓取考勤内容的方法(部分代码来自网络)，希望有人修改后也可以用上，哈哈！
     公司内部系统，登录没有验证码，如果是有验证码的系统还得找破解方法
     定时器是用的spring的，没用spring的可以自己写个定时器
     用到的组件：httpclient-4.2.5.jar,httpcore-4.2.4.jar,jsoup-1.7.2.jar
     jsoup官方下载地址：http://jsoup.org/download
     httpclient官方下载地址:http://hc.apache.org/downloads.cgi
     废话不多说，贴上我的代码

 @Component
 public class Login  extends BaseJobs {

     SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
     /**
      * 获取当月第一天
      *
      * @return
      */
     public String getFirstDayOfMonth() {
         Calendar lastDate = Calendar.getInstance();
         lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
         return sdf.format(lastDate.getTime());  

     }  

     /**
      * 计算当月最后一天
      * @return
      */
     public String getLastDayOfMonth() {  

         Calendar lastDate = Calendar.getInstance();
         lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
         lastDate.add(Calendar.MONTH, 1);// 加一个月，变为下月的1号
         lastDate.add(Calendar.DATE, -1);// 减去一天，变为当月最后一天
         return sdf.format(lastDate.getTime());  

     }  

     //测试
     public static void main(String args[]) throws Exception {
         Login l = new Login();
          l.login();
     }

     private static CookieStore cs = new BasicCookieStore();

     //利用spring定时器 每天早上10点一刻抓取并发邮件
     @Scheduled(cron = "0 15 10 ? * *")
     public void login() throws Exception {
         DefaultHttpClient httpclient = new DefaultHttpClient();

         // 创建一个本地上下文信息
         HttpContext localContext = new BasicHttpContext();
         // 在本地上下问中绑定一个本地存储
         localContext.setAttribute(ClientContext.COOKIE_STORE, cs);
         // 目标地址
         HttpPost httppost = new HttpPost(
                 "http://***/userLogin.do");
         // 传参
         StringEntity reqEntity = new StringEntity(
                 "userName=jianancun&password=123456&randNum=565656");
         // 设置类型
         reqEntity.setContentType("application/x-www-form-urlencoded");
         // 设置请求的数据
         httppost.setEntity(reqEntity);
         // 执行
         HttpResponse response = httpclient.execute(httppost);
         //取得所有头内容
         Header[] headers = response.getAllHeaders();
         for (Header h : headers) {
             String name = h.getName();
             String value = h.getValue();
             System.out.println("header : " + h.getName() + ":" + h.getValue());
             if ("Set-Cookie".equalsIgnoreCase(name)) {
                 String[] strs = value.split(";");
                 for (String str : strs) {
                     String[] cookies = str.split("=");
                     //输出cookie名称及标题
                    // System.out.println("=============== : " + cookies[0] + ":" + cookies[1]);
                     cs.addCookie(new BasicClientCookie(cookies[0], cookies[1]));
                 }
                 cs.addCookie(new BasicClientCookie("userId", "8888"));
                 cs.addCookie(new BasicClientCookie("userName", "jiannancun"));
                 cs.addCookie(new BasicClientCookie("state", "0"));
                 cs.addCookie(new BasicClientCookie("iAdmin", "0"));
                 cs.addCookie(new BasicClientCookie("depCode", "0"));
             }
         }
         HttpEntity entity = response.getEntity();
         // 显示结果
         BufferedReader reader = new BufferedReader(new InputStreamReader(
                 entity.getContent(), "UTF-8"));
         String line = null;
         //返回是否登录成功的内容 忽略
         while ((line = reader.readLine()) != null) {
           //  System.out.println(line);
         }

        //可以添加多个用户
        String jlc[] ={URLEncoder.encode("贱男春"),"jiannancun@*.cn","888888"};
        List<String[]> list = new ArrayList<String[]>();
        list.add(jlc);

        for(String []u:list){
            //查询本月考勤内容
            String logPath = "http://**.cn/timeCard.jsp?nickName="+u[0]+"&eplTimeCard="
            +u[2]+"&begDate="+getFirstDayOfMonth()+"&endDate="+getLastDayOfMonth();
            String content= getContent(logPath);
             Document doc = Jsoup.parse(content);
             Elements tds = doc.select("table td");
             int i =0;
             //返回的内容
             String html =""; ;
              for (Element td : tds) {
                 //取前25行内容   前25行内容显示的是昨天和今天的考勤记录
                  if(i<25){
                   html+=td.text().replace(u[2],URLDecoder.decode(u[0]))+"<br>" ;
                  } else break;

                  i++;
              }
             Map<String,Object> map = new HashMap<String,Object>();
                 map.put("mailTo",u[1]);
                 map.put("mailTitle","考勤提醒");
                 map.put("messageBody",html);
                 //发送邮件
                 //sendMail(map);
        }
     }
     /**
      *  Function: 请求地址并返回页面内容
      *  @author JNC
      *  @param url
      *  @return
      *  @throws Exception
      */
     private String getContent(String url) throws Exception {
         DefaultHttpClient httpclient = new DefaultHttpClient();
         String cookieStr = "";
         List<Cookie> list = cs.getCookies();
         for (Cookie cookie : list) {
             cookieStr += cookie.getName() + "=" + cookie.getValue() + ";";
         }
         // 请求目标地址并带上cookie
         HttpGet httpget = new HttpGet(url);
         httpget.setHeader("Cookie", cookieStr);
         // 执行
         HttpResponse response = httpclient.execute(httpget);
         HttpEntity entity = response.getEntity();
         String resultStr ="";
         BufferedReader reader = new BufferedReader(new InputStreamReader(
                 entity.getContent(), "UTF-8"));
         String line = null;
         while ((line = reader.readLine()) != null) {
             resultStr+=line;
         }
        return resultStr;
     }
 }

原文地址：http://www.liutime.com/javainfo/2150/