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/