一个程序，它从数据库中获取地址并向 google geocode api 发出请求以获取地址。
这是我观察到的错误，任何人都可以帮助我如何使谷歌的响应更准确。
- 它忽略城市并返回具有相同名称但在不同城镇的街道的坐标，例如
Vidin, Perushtica 5 它返回 Haskovo, Perushtica 5 的坐标
2.我观察到有时例如今天我有 1000 个地址，当我看到结果时，我看到谷歌没有找到格式正确的地址，当我去谷歌网站https://maps.google.bg/maps ?hl=en&tab=wl并输入地址 - 它完美地找到它。今天我决定检查其中一个地址，这次它找到了。为什么有时它会找到它有时不会
我的代码
public class TestCon {
static URL url;
static String nodeString="";
static String nody="";
//static String[] nodeString={};
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=1;j<1000;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="";
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(urlString);
// Convert the string to a URL so we can parse it
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 ("You're here");
urlString = GEOCODE_REQUEST_PREFIX + "?address=" + URLEncoder.encode(townstr, "UTF-8") + "&sensor=false";
//System.out.println(urlString);
// Convert the string to a URL so we can parse it
url = new URL(urlString);
geocoderResultDocument = makeConnection(url);
nodes = process(geocoderResultDocument, xPathString);
nodes2 = process(geocoderResultDocument, xi);
}
if ((nodes.getLength()>1)&&(nodes2.getLength()>1))
{
System.out.println("morethan one");
}
// Print results
//for (int i = 0; i < nodes.getLength(); i++)
//{
nodeString = nodes.item(0).getTextContent();
// nodeString = nodes(i).getTextContent();
System.out.println("lat_cordinate:" + nodeString);
//}
//for (int i = 0; i < nodes2.getLength(); i++)
//{
nody = nodes2.item(0).getTextContent();
// nodeString = nodes(i).getTextContent();
System.out.println("longitude:" + nody);
//}
}
}
private void TestCon() {
}
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;
}
}