在我要地圖手機版中提供了查詢當前城市未來三天內天氣預報的功能。天氣預報中提供了天氣情況，空氣質量，穿衣指數，洗車指數等信息。
具體的實現思路是，通過httpclient發送查詢請求到yahoo的天氣預報接口，通過htmlparser解析返回結果，并且通過jdom包裝成一個xml返回到j2me實現的手機客戶端。繼而展示！
代碼如下：
MultiThreadedHttpConnectionManager connectionManager = new MultiThreadedHttpConnectionManager();
HttpClient client = new HttpClient(connectionManager);
client.getHostConfiguration().setProxy("proxy******", *****);
Credentials defaultcreds = new UsernamePasswordCredentials(
"XXXXXX@****.com", "XXXXXXXXX");
client.getState().setProxyCredentials(AuthScope.ANY, defaultcreds);
outdoc = new Document();
//增加根節點
Element rootElement = new Element("handmap");
rootElement.setAttribute("version", "1.0");
HttpMethod method = new PostMethod(
"http://yahooweatherurl?city="
+ URLEncoder.encode(this.cy, "utf-8"));
client.executeMethod(method);
String result = method.getResponseBodyAsString();
System.out.println(result);
System.out.println("----------------------------");
Parser parser;
parser = new Parser(result);
parser.setEncoding("GBK");
// 尋找div的class是box2 p14的內容
NodeFilter filter = new AndFilter(new TagNameFilter("div"),
new HasAttributeFilter("class", "box6"));
NodeList nodeList = parser.parse(filter);
parser.setInputHTML(result);
NodeFilter contentfilter = new AndFilter(new TagNameFilter("div"),
new HasAttributeFilter("class", "box7"));
NodeList contentNodeList = parser.parse(contentfilter);
NodeIterator it = nodeList.elements();
NodeIterator contentIt = contentNodeList.elements();
Node node = null;
Node contentNode = null;
StringBuffer buffer=new StringBuffer(500);
while (it.hasMoreNodes()) {
node = it.nextNode();
contentNode = contentIt.nextNode();
String nodehtml = node.toHtml();
String day = StringUtils.substringBetween(nodehtml,
"<span class=\"f18\">", "</p>");
day = day.replaceAll("</span><br />", " ");
day = day.replaceAll(" ", "");
buffer.append(day).append("\n");
//System.out.println(day);
String weather = StringUtils.substringBetween(nodehtml,
"<span class=\"f14\"><strong>", "</strong>");
weather = weather.replaceAll(" ", "");
buffer.append(weather).append("\n");
//System.out.println(weather);
String content = contentNode.toPlainTextString().replaceAll(
" ", "");
buffer.append(content).append("\n\n");
}
rootElement.setText(buffer.toString());
outdoc.setRootElement(rootElement);
} catch (UnsupportedEncodingException e) {
log.error(e.getLocalizedMessage());
} catch (MalformedURLException e) {
log.error(e.getLocalizedMessage());
} catch (IOException e) {
log.error(e);
} catch (ParserException e) {
e.printStackTrace();
}
當中需要說明的是，因為公司使用代理，所以在httpclient中我加入了代理設置：
client.getHostConfiguration().setProxy("proxy", port);
Credentials defaultcreds = new UsernamePasswordCredentials(
"XXXXXX@lingtu.com", "XXXXXXXXX");
client.getState().setProxyCredentials(AuthScope.ANY, defaultcreds);
posted on 2008-09-06 08:57
張氏兄弟 閱讀(1374)
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手機地圖