java利用爬虫技术抓取(省、市(区号\邮编)、县)数据

近期项目须要用到 城市的地址信息，但从网上下载的xml数据没有几个是最新的地址信息.....数据太老，导致有些地区不全。所以才想到天气预报官网特定有最新最全的数据。贴出代码，希望能给有相同困惑的朋友。降低一些时间。

	/**
	 * @param var  城市名称
	 * @return	string数组。0表示邮编	1表示区号
	 */
	@SuppressWarnings("deprecation")
	private String[] getZipCode(String var) {
		String[] code = new String[2];
		String zipCode_S = "邮编：";
		String zipCode_E = " ";
		String qhCode_S = "区号：";
		String qhCode_E = "</td>";
		String encode = URLEncoder.encode(var);
		try {
			URL url = new URL("http://www.ip138.com/post/search.asp?
area="
					+ encode + "&action=area2zone");
			BufferedReader br = new BufferedReader(new InputStreamReader(
					url.openStream(), "GBK"));
			for (String line; (line = br.readLine()) != null;) {
				int zipNum = line.indexOf(zipCode_S);
				if (zipNum > 1) {
					String str = line.substring(zipNum + zipCode_S.length());
					str = str.substring(0, str.indexOf(zipCode_E));
					code[0] = str;
				}
				int qhNum = line.indexOf(qhCode_S);
				if(qhNum > 1)
				{
					String str = line.substring(qhNum + qhCode_S.length());
					str = str.substring(0, str.indexOf(qhCode_E));
					code[1] = str;
					break;
				}
			}
		} catch (Exception e) {
			System.out.println(var +"\t错误"+e.toString());
		}
		return code;
	}

	/**
	 * 	主程序
	 * @throws Exception
	 */
	@Test
	public void main() throws Exception
	{
		//1:获取全部省份
		TreeMap<String,String> provincesBuffer = getAddressInfo("http://www.weather.com.cn//data/city3jdata/china.html");
		Element prcEle = DocumentHelper.createElement("Provinces");
		
		//2：依据省份获取城市
		Element citysEle = DocumentHelper.createElement("Citys");
		
		//3：依据省份城市获取区、县
		Element distEle = DocumentHelper.createElement("Districts");
		int p = 1;
		int c = 1;
		int d = 1;
		for(Entry<String, String> prc : provincesBuffer.entrySet())
		{
			Element province = DocumentHelper.createElement("Province");
			province.addAttribute("ID",""+(p)).addAttribute("ProvinceName", prc.getValue()).addText(prc.getValue());
			//获取邮政编号
			TreeMap<String,String> cityBuffer = getAddressInfo("http://www.weather.com.cn/data/city3jdata/provshi/"+prc.getKey()+".html");
			for(Entry<String, String> citys : cityBuffer.entrySet())
			{
				Element city = DocumentHelper.createElement("City");
				String[] zipCode = getZipCode(citys.getValue());
				if(zipCode[0]==null||zipCode[1]==null)
					System.out.println("缺少"+citys.getValue()+"邮政或区号！");
				city.addAttribute("ID", ""+c).addAttribute("CityName", citys.getValue()).addAttribute("PID",p+"").addAttribute("ZipCode", zipCode[0]).addAttribute("AreaCode", zipCode[1]).addText(citys.getValue());
				TreeMap<String, String> distsBuffer = getAddressInfo("http://www.weather.com.cn/data/city3jdata/station/"+prc.getKey()+""+citys.getKey()+".html");
				for(Entry<String, String> dists : distsBuffer.entrySet())
				{
					String value = dists.getValue();
					if(value.equals(citys.getValue()))
						continue;
					
					Element district = DocumentHelper.createElement("District");
					district.addAttribute("ID",""+(d++)).addAttribute("DistrictName", dists.getValue()).addAttribute("CID", c+"").addText(dists.getValue());
					distEle.add(district);
				}
				citysEle.add(city);
				c++;
			}
			prcEle.add(province);
			p++;
		}
		//4：保存到本地
		saveInf("f:\\Provinces.xml",prcEle);
		saveInf("f:\\Citys.xml",citysEle);
		saveInf("f:\\Districts.xml",distEle);
	}
	
	/**	保存xml
	 * @param savePath  xml保存路径
	 * @param varEle	根元素
	 */
	private void saveInf(String savePath, Element varEle) {
		Document varDoc = DocumentHelper.createDocument();
		varDoc.add(varEle);
		try {
			XMLWriter xmlwri = new XMLWriter(new FileOutputStream(new File(savePath)), new OutputFormat("\t", true, "UTF-8"));
			xmlwri.write(varDoc);
			xmlwri.close();
		} catch (Exception e) {
			System.out.println(savePath +"失败，原因例如以下");
			throw new RuntimeException(e);
		}
	}

	/**
	 * 	获取信息
	 * @param address  url路径   
	 * @return	key :信息编号	value：信息名称
	 */
	private TreeMap<String, String> getAddressInfo(String address) {
		TreeMap<String,String> china = new TreeMap<String, String>();
		BufferedReader br = null;
		String buffer = null;
		try {
			URL url = new URL(address);
			br = new BufferedReader(new InputStreamReader(url.openStream(),"UTF-8"));
			buffer = br.readLine();
		} catch (Exception e) {
			System.out.println("错误："+e.getMessage());
		}finally{
			if(br != null)
				try {
					br.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
		}
		if(buffer==null) 
			return china;
		
		buffer = buffer.replaceAll("\\{|\\}|\"","");
		String[] splits = buffer.split(",");
		for(String sp : splits)
		{
			String[] split = sp.split(":");
			if(split!=null && split.length == 2)
				china.put(split[0], split[1]);
			else
				System.out.println(address);
		}
		buffer = null;
		return china;
	}

下载xml数据