获取网页中所有的小客车摇号信息

    杭州摇号网站分页显示，浏览起来非常的不方便，于是写了几行代码

将它给全部下载到一个文件中。代码很简单，先通过httpwatch观察，http

是如何拼接请求的，然后在代码中将链接拼接好，批量下载下来。

  

PrintStream ps = null;

		try {

			ps = new PrintStream(new FileOutputStream("company.txt"));

		} catch (FileNotFoundException e1) {

			e1.printStackTrace();

		}

		for(int i = 1; i <= 40; i++){

			HttpClient client = new DefaultHttpClient();

			//http://apply.hzcb.gov.cn/apply/app/status/norm/unit

			//http://apply.hzcb.gov.cn/apply/app/status/norm/person

			HttpPost httppost = new HttpPost("http://apply.hzcb.gov.cn/apply/app/status/norm/unit");

			httppost.setHeader("Referer","http://apply.hzcb.gov.cn/apply/app/status/norm/unit");

			List<NameValuePair> params = new ArrayList<NameValuePair>();

			String pageNo = new Integer(i).toString();

			params.add(new BasicNameValuePair("pageNo", pageNo));

			params.add(new BasicNameValuePair("issueNumber", "201405"));

			params.add(new BasicNameValuePair("applyCode", ""));

			httppost.setEntity(new UrlEncodedFormEntity(params));



			HttpResponse response = client.execute(httppost);

			HttpEntity  entity = response.getEntity();

			// 在这里可以用Jsoup之类的工具对返回结果进行分析，以判断登录是否成功

			String postResult = EntityUtils.toString(entity, "GBK"); 

			Document document = Jsoup.parse(postResult);

			Elements carpersons = document.select("tr.content_data");

			for(Element e : carpersons){

				String id = "";

				String name = "";

				Elements props = e.select("td");

				int count = 0;

				for(Element e1 : props){

					if(count == 0)

						id = e1.text();

					else

						name = e1.text();

					count++;

				}

				System.out.println("id:" + id + " name:" + name);

				ps.println(id + "\t" + name);

				

			}

		}

		if (null != ps) {

			ps.close();

		}

	}