獲取網頁中全部的小客車搖號信息

    杭州搖號網站分頁顯示，瀏覽起來很是的不方便，因而寫了幾行代碼

將它給所有下載到一個文件中。代碼很簡單，先經過httpwatch觀察，http

是如何拼接請求的，而後在代碼中將連接拼接好，批量下載下來。

  

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();
			// 在這裏能夠用Jsoup之類的工具對返回結果進行分析，以判斷登陸是否成功
			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();
		}
	}