我正在创建一个程序，该程序获取用户输入的地址，并使用GeoCoder将该地址放在地图上。这是通过oracle adf专题图和java作为支持bean来完成的。我得到的问题是输入工作，但只有在用户的输入中没有空格。当输入的输入中有空格时，我收到此错误：
<oracle.adf.view> <PartialResponseUtils> <handleError> <ADF_FACES-60096:Server Exception during PPR, #1>
javax.el.ELException: .../map.jsf @76,86 pointX="#{row.lattitude}": java.lang.NullPointerException
由于GeoCoder不关心空格，我猜测错误是在地图代码中？这是地图jsf页面的代码：
<af:form id="f1">
<af:panelStretchLayout topHeight="50px" id="psl1">
<f:facet name="top">
<af:panelHeader text="Regional Map" id="ph1">
<f:facet name="context"/>
<f:facet name="menuBar"/>
<f:facet name="toolbar"/>
<f:facet name="legend"/>
<f:facet name="info"/>
</af:panelHeader>
</f:facet>
<f:facet name="center">
<af:panelSplitter id="ps1" splitterPosition="289">
<f:facet name="first">
<af:decorativeBox id="db1">
<f:facet name="center">
<af:panelGroupLayout layout="scroll" id="pgl1">
<af:panelFormLayout id="pfl1">
<f:facet name="footer">
<af:commandButton text="Add Location" id="cb1" partialSubmit="true"
actionListener="#{locationsCollector.addCurrentLocation}"/>
</f:facet>
<af:inputText label="Label" id="it1" autoSubmit="true"
value="#{currentLocation.label}"/>
<af:inputText label="Description" id="it1a" autoSubmit="true"
value="#{currentLocation.description}"/>
<af:inputText label="Location (NO SPACES)" id="it2" autoSubmit="true"
value="#{currentLocation.location}"/>
</af:panelFormLayout>
<af:spacer id="spac1" height="40"/>
<af:table value="#{locationsCollector.locations}" var="row"
rowBandingInterval="0" id="t1" partialTriggers="::cb1">
<af:column sortable="false" headerText="Label" align="start" id="c1">
<af:outputText value="#{row.label}" id="ot1"
shortDesc="#{row.description}"/>
</af:column>
<af:column sortable="false" headerText="Description" align="start" id="c2">
<af:outputText value="#{row.description}" id="ot2"/>
</af:column>
<!--<af:column sortable="false" headerText="Country" align="start" id="c3">
<af:outputText value="#{row.country}" id="ot3"/>
</af:column>-->
</af:table>
</af:panelGroupLayout>
</f:facet>
<!--<f:facet name="top">
<af:panelHeader text="Enter location details" id="ph2">
<f:facet name="context"/>
<f:facet name="menuBar"/>
<f:facet name="toolbar"/>
<f:facet name="legend"/>
<f:facet name="info"/>
</af:panelHeader>
</f:facet>-->
</af:decorativeBox>
</f:facet>
<f:facet name="second">
<dvt:thematicMap basemap="usa" id="tm1" partialTriggers="::cb1" summary="map">
<dvt:areaLayer layer="states" id="al1" rendered="true">
<dvt:pointDataLayer id="pdl1c" value="#{locationsCollector.locations}" var="row">
<dvt:pointLocation id="pl1c" type="pointXY" pointX="#{row.lattitude}"
pointY="#{row.longitude}">
<dvt:marker id="m1c" labelDisplay="on" value="#{row.label}"
labelPosition="top"
shortDesc="#{row.description} #{row.location} "/>
</dvt:pointLocation>
</dvt:pointDataLayer>
</dvt:areaLayer>
</dvt:thematicMap>
</f:facet>
</af:panelSplitter>
<!-- id="af_one_column_header_stretched" -->
</f:facet>
</af:panelStretchLayout>
</af:form>
以下是从Geocoder获取纬度和经度以添加到地图的点细节的bean：
public class Location {
private String location;
private String country;
private String label;
private String description;
private float[] coordinates;
private static float[] getCoordinatesForLocation(String location) {
URL geoCodeUrl;
String url = "http://maps.googleapis.com/maps/api/geocode/json?address=" + location
+ "&oe=utf8&sensor=false";
try {
geoCodeUrl
= new URL(url);
} catch (MalformedURLException e) {
System.out.println(e.getMessage() + " url=" + url);
return null;
}
BufferedReader in;
String coord = null;
try {
in = new BufferedReader(new InputStreamReader(geoCodeUrl.openStream()));
char[] buf = new char[8000];
in.read(buf);
coord = new StringBuilder().append(buf).toString();
in.close();
} catch (IOException e) {
System.out.println(e.getMessage() + " IO Exception ");
return null;
}
if (coord != null) {
float[] coordinates;
try {
// find first occurrence of lat
int posLAT = coord.indexOf("\"lat\"");
String latString = coord.substring(posLAT, posLAT + 21);
String lat = latString.split(":")[1].replaceAll(" ", "").replaceAll(",", "");
// find first occurrence of lng
int posLNG = coord.indexOf("\"lng\"");
String lngString = coord.substring(posLNG, posLNG + 21);
String lng = lngString.split(":")[1].replaceAll(" ", "").replaceAll(",", "");
coordinates
= new float[]{Float.parseFloat(lat), Float.parseFloat(lng)};
return coordinates;
} catch (Exception e) {
System.out.println("Coordinates stank " + coord);
}
}
System.out.println("Failed to create proper coordinates; sorry!");
return null;
}
public void setLocation(String location) {
this.location = location;
}
public String getLocation() {
return location;
}
public void setCountry(String country) {
this.country = country;
}
public String getCountry() {
return country;
}
public void setLabel(String label) {
this.label = label;
}
public String getLabel() {
return label;
}
public void setCoordinates(float[] coordinates) {
this.coordinates = coordinates;
}
public float[] getCoordinates() {
if (coordinates == null) {
coordinates = getCoordinatesForLocation(location);
}
return coordinates;
}
public float getLongitude() {
return getCoordinates()[0];
}
public float getLattitude() {
return getCoordinates()[1];
}
public void setDescription(String description) {
this.description = description;
}
public String getDescription() {
return description;
}
}
我正在寻找的是程序接受带空格的地址的能力，因此程序更加用户友好。谢谢你看这个！