你好我有这个java程序从数据库中获取地址，对谷歌地理编码api进行requeset然后我想看看lat，lng cordinates。
此外，由于某些地址无法通过谷歌找到 - 所以我已经决定，如果谷歌无法找到城镇和街道的地址，我只提出城镇名称请求。
这是java程序
public class TestCon {
static String nodeString="";
static String nody="";
static String elementValue = "";
static String townstr="";
static String streetstr="";
static String urlString;
static Document geocoderResultDocument;
static NodeList nodes2;
static Connection conn2 = null;
static NodeList nodes;
private static final String GEOCODE_REQUEST_PREFIX = "http://maps.google.com/maps/api/geocode/xml";
public String _xpath = null;
public Document _xml = null;
public static void main(String[] args) throws IOException, URISyntaxException, ParserConfigurationException, SAXException, ClassNotFoundException, SQLException
{ Class.forName("org.postgresql.Driver");
try
{
conn2 = DriverManager.getConnection(
"jdbc:postgresql://localhost:5432/plovdivbizloca",
"postgres", "tan");
}
catch (SQLException ex)
{
ex.printStackTrace();
}
for (int j=1500;j<1550;j++)
{
try
{
conn2 = DriverManager.getConnection(
"jdbc:postgresql://localhost:5432/plovdivbizloca",
"postgres", "tan");
}
catch (SQLException ex)
{
ex.printStackTrace();
}
Statement mystmt = null;
String selectQuery = "SELECT main_office_town, address FROM pl_biz where id="+j;
try
{
mystmt = conn2.createStatement();
ResultSet mysr = mystmt.executeQuery(selectQuery);
ResultSetMetaData rsmd = mysr.getMetaData();
int colCount = rsmd.getColumnCount();
elementValue="";
townstr="";
while (mysr.next())
{
for (int i = 1; i <= colCount; i++)
{
elementValue += mysr.getString(i);
if (i < colCount)
elementValue += ",";
}
townstr = mysr.getString(1);
streetstr = mysr.getString(2);
//System.out.println(elementValue);
//System.out.println(townstr);
//System.out.println(streetstr);
}
}
catch (Exception ex)
{
}
// NEW GEOCODING;
String inputQuery, resultXml, xPathString, xi = null;
inputQuery = elementValue;
urlString = GEOCODE_REQUEST_PREFIX + "?address=" + URLEncoder.encode(inputQuery, "UTF-8") + "&sensor=false";
System.out.println("FIRST URL WITH THE WHOLE ADDRESS: "+urlString);
// Convert the string to a URL so we can parse it
URL url = new URL(urlString);
geocoderResultDocument = makeConnection(url);
// Process the results
xPathString = "//GeocodeResponse//location/lat";
nodes = process(geocoderResultDocument, xPathString);
xi = "//GeocodeResponse//location/lng";
nodes2 = process(geocoderResultDocument, xi);
if ((nodes.getLength()==0)&&(nodes2.getLength()==0))
{
System.out.println ("ZERO RESULTS FOUND - making NEW REQUEST");
urlString = GEOCODE_REQUEST_PREFIX + "?address=" + URLEncoder.encode(townstr, "UTF-8") + "&sensor=false";
System.out.println("new url only with towwn" + urlString);
//System.out.println(townstr);
// Convert the string to a URL so we can parse it
URL url2 = new URL(urlString);
geocoderResultDocument = makeConnection(url2);
System.out.println("EHOOO");
nodes = process(geocoderResultDocument, xPathString);
nodes2 = process(geocoderResultDocument, xi);
System.out.println("after teh new search only with town nodes length is: "+nodes.getLength());
}
if ((nodes.getLength()>=1)&&(nodes2.getLength()>=1))
{
if ((nodes.getLength()>1)&&(nodes2.getLength()>1))
{System.out.println("more than one result found - get the first closest");}
// Print results
nodeString = nodes.item(0).getTextContent();
System.out.println("lat_cordinate:" + nodeString);
nody = nodes2.item(0).getTextContent();
System.out.println("longitude:" + nody);
}
else
{
System.out.println("After making an request only with town - again zero result");
}
System.out.println("jjj"+j);
}
}
public static NodeList process(Document xml, String xPathStrings)
throws IOException {
NodeList result = null;
XPathFactory factory = XPathFactory.newInstance();
XPath xpath = factory.newXPath();
try {
result = (NodeList) xpath.evaluate(xPathStrings, xml,
XPathConstants.NODESET);
}
catch (XPathExpressionException ex) {
ex.printStackTrace();
}
return result;
}
public static Document makeConnection(URL url) throws IOException, SAXException, ParserConfigurationException
{
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
Document geocoderResultDocument = null;
try
{
// open the connection and get results as InputSource.
conn.connect();
InputSource geocoderResultInputSource = new InputSource(conn.getInputStream());
// read result and parse into XML Document
geocoderResultDocument = DocumentBuilderFactory.newInstance().newDocumentBuilder().parse(geocoderResultInputSource);
}
finally
{
conn.disconnect();
}
return geocoderResultDocument;
}
问题在于我得到的回应：
我测试了地址和坐标，大部分时间都是正确的，反应是对的。但在某些时候我注意到这种奇怪的情况 - 看看这个回复的例子，地址为id = 1512
发现零结果 - 提出新请求 只有towwn的新网址：http://maps.google.com/maps/api/geocode/xml?address=%D0%9F%D0%BB%D0%BE%D0%B2%D0%B4%D0%B8%D0%B2&sensor=false
EHOOO 在新搜索之后，只有城镇节点的长度为：0
仅在提出请求之后 - 再次为零结果
jjj1522
如果您点击网址，您将会在gooogle找到地址的两个时间点 - 但正如您所看到的程序告诉我谷歌没有找到地址 - 我无法理解为什么< /强>
答案 0 :(得分：0)
尝试将它们转换为英语地址...使用结果中建议的地址而不是编码的俄语地址..