package com.arj.comm.util;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
public class WeatherReport {
/**
* 获取SOAP的请求头，并替换其中的标志符号为用户输入的城市
*
* 编写者：王景辉
*
* @param city
* 用户输入的城市名称
* @return 客户将要发送给服务器的SOAP请求
*/
private static String getSoapRequest(String city) {
StringBuilder sb = new StringBuilder();
sb
.append("<?xml version=\"1.0\" encoding=\"utf-8\"?>"
+ "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" "
+ "xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" "
+ "xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"
+ "<soap:Body> <getWeatherbyCityName xmlns=\"http://WebXml.com.cn/\">"
+ "<theCityName>" + city
+ "</theCityName> </getWeatherbyCityName>"
+ "</soap:Body></soap:Envelope>");
return sb.toString();
}
/**
* 用户把SOAP请求发送给服务器端，并返回服务器点返回的输入流
*
* 编写者：王景辉
*
* @param city
* 用户输入的城市名称
* @return 服务器端返回的输入流，供客户端读取
* @throws Exception
*/
private static InputStream getSoapInputStream(String city) throws Exception {
try {
String soap = getSoapRequest(city);
if (soap == null) {
return null;
}
URL url = new URL(
"http://www.webxml.com.cn/WebServices/WeatherWebService.asmx");
URLConnection conn = url.openConnection();
conn.setUseCaches(false);
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setRequestProperty("Content-Length", Integer.toString(soap
.length()));
conn.setRequestProperty("Content-Type", "text/xml; charset=utf-8");
conn.setRequestProperty("SOAPAction",
"http://WebXml.com.cn/getWeatherbyCityName");
OutputStream os = conn.getOutputStream();
OutputStreamWriter osw = new OutputStreamWriter(os, "utf-8");
osw.write(soap);
osw.flush();
osw.close();
InputStream is = conn.getInputStream();
return is;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* 对服务器端返回的XML进行解析
*
* 编写者：王景辉
*
* @param city
* 用户输入的城市名称
* @return 字符串 用,分割
*/
public static String getWeather(String city) {
try {
Document doc;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
DocumentBuilder db = dbf.newDocumentBuilder();
InputStream is = getSoapInputStream(city);
doc = db.parse(is);
NodeList nl = doc.getElementsByTagName("string");
StringBuffer sb = new StringBuffer();
for (int count = 0; count < nl.getLength(); count++) {
Node n = nl.item(count);
if(n.getFirstChild().getNodeValue().equals("查询结果为空！")) {
sb = new StringBuffer("#") ;
break ;
}
sb.append(n.getFirstChild().getNodeValue() + "#\n");
}
is.close();
return sb.toString();
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
/**
* 测试用
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
System.out.println(getWeather("长沙"));
System.out.println("po&oi".split("&").length) ;
System.out.println("##".split("#").length) ;
}
}