新手看一个调用API获取天气的例程，实际运行时出现错误，得不到请求的结果，求各位看看是哪的问题
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;
import java.util.List;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.SAXException;
public class WeatherUtil {
private static String SERVICES_HOST = "www.webxml.com.cn";
private static String WEATHER_SERVICES_URL = "http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx/";
private static String GET_CITY_CODE = WEATHER_SERVICES_URL
+ "getSupportCityString?theRegionCode=";
private static String WEATHER_QUERY_URL = WEATHER_SERVICES_URL
+ "getWeather?theUserID=&theCityCode=";
private static String GET_REGION_BY_IP = "http://www.webxml.com.cn/WebServices/IpAddressSearchWebService.asmx/getGeoIPContext";
private static String GET_PROVINCE_CODE = WEATHER_SERVICES_URL
+ "getRegionProvince";
private WeatherUtil(){}
public static InputStream getSoapInputStream(String url)
{
InputStream is = null;
try {
URL U = new URL(url);
System.out.println("getInputStream Executed");
URLConnection conn = U.openConnection();
conn.setRequestProperty("Host", SERVICES_HOST);
conn.connect();
is = conn.getInputStream();
System.out.println(is);
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return is;
}
public static List<String> getWeather(int cityCode)
{
List<String> weatherList = new ArrayList<String>();
Document doc;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
try {
DocumentBuilder db = dbf.newDocumentBuilder();
InputStream is = getSoapInputStream(WEATHER_QUERY_URL
+ cityCode);
doc = db.parse(is);
NodeList nl = doc.getElementsByTagName("string");
int len = nl.getLength();
for (int i = 0; i < len; i++)
{
Node n = nl.item(i);
String weather = n.getFirstChild().getNodeValue();
weatherList.add(weather);
}
is.close();
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (DOMException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return weatherList;
}
public static void main(String[] args) throws Exception
{
getRegion();
String[] pInfo = getRegion();
String provinceName = pInfo[0];
String cityName = pInfo[1];
int provinceCode = getProvinceCode(provinceName);
int cityCode = getCityCode(provinceCode, cityName);
List<String> weatherList = WeatherUtil.getWeather(cityCode);
for (String weather : weatherList)
{
System.out.println(weather);
}
}
public static String[] getRegion()
{
Document doc;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
String[] regionInfo = new String[5];
try {
DocumentBuilder db = dbf.newDocumentBuilder();
InputStream is = getSoapInputStream(GET_REGION_BY_IP);
doc = db.parse(is);
NodeList nl = doc.getElementsByTagName("string");
int len = nl.getLength();
for (int i = 0; i < len; i++)
{
if(i == 1)
{
Node n = nl.item(i);
String[] provinceInfo = n.getFirstChild().getNodeValue().split("省");
String province = provinceInfo[0];
String[] cityInfo = provinceInfo[1].split("市"); ／／错误：此处数字超出范围，说明没有获取到province 值，回溯上面的doc发现值为documen：NUll
String city = cityInfo[0];
regionInfo[0] = province;
regionInfo[1] = city;
}
}
is.close();
} catch (DOMException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return regionInfo;
}
public static int getProvinceCode(String provinceName)
{
Document doc;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
int provinceCode = 0;
try {
DocumentBuilder db = dbf.newDocumentBuilder();
InputStream is = getSoapInputStream(GET_PROVINCE_CODE);
doc = db.parse(is);
NodeList nl = doc.getElementsByTagName("string");
int len = nl.getLength();
for (int i = 0; i < len; i++)
{
Node n = nl.item(i);
String result = n.getFirstChild().getNodeValue();
String[] address = result.split(",");
String pName = address[0];
String pCode = address[1];
if(pName.equalsIgnoreCase(provinceName))
{
provinceCode = Integer.parseInt(pCode);
}
}
is.close();
} catch (DOMException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return provinceCode;
}
public static int getCityCode(int provinceCode, String cityName)
{
Document doc;
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
dbf.setNamespaceAware(true);
int cityCode = 0;
try {
DocumentBuilder db = dbf.newDocumentBuilder();
InputStream is = getSoapInputStream(GET_CITY_CODE + provinceCode);
doc = db.parse(is);
NodeList nl = doc.getElementsByTagName("string");
int len = nl.getLength();
for (int i = 0; i < len; i++)
{
Node n = nl.item(i);
String result = n.getFirstChild().getNodeValue();
String[] address = result.split(",");
String cName = address[0];
String cCode = address[1];
if(cName.equalsIgnoreCase(cityName))
{
cityCode = Integer.parseInt(cCode);
}
}
is.close();
} catch (DOMException e) {
e.printStackTrace();
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
return cityCode;
}
错误截图：
我看有连接服务器是本地的，是不是连接网络服务器需要设置什么？
还是服务器API接口已经不能用了？
图中输出是我加的标记，sun.net那一行是getSoapInputStream（）方法里最终获得的InputStream输出。
谢谢各位大神了
