Android - XPathを使用してXMLから値を取得する

Question

Webサービスから次のXMLを取得しました。 XPathを使用して、XMLからDependent FirstName（Rajesh）の値を取得するにはどうすればよいですか？これはAndroid向けです。誰かが私にこれを助けることができますか？

<Enrollment xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> 
<ContactInfo> 
<_contactRelations/> 
<ContactId>83</ContactId> 
<ImportId>-1</ImportId> 
<ExtContactId>1-CCR1</ExtContactId> 
<OrgId>EX-PG-30021045</OrgId> 
<ParContactId/> 
<EmployeeId>M101</EmployeeId> 
<FullName>Mahesh CN</FullName> 
<FirstName>Mahesh</FirstName> 
<MiddleName/> 
<LastName>CN</LastName> 
<DOB>1980-03-02T00:00:00</DOB> 
<Address1>address</Address1> 
<Address2/> 
<Address3/> 
<City>new city</City> 
<County>Saint Lawrence</County> 
<State>VA</State> 
<PostalCode>11111</PostalCode> 
<HomePhoneNo/> 
<WorkPhoneNo/> 
<CellPhoneNo/> 
<EmailAddress>mahesh.narayanan@speridian.com</EmailAddress> 
<Active>1</Active> 
<InActiveDt>0001-01-01T00:00:00</InActiveDt> 
<HiredDt>2012-03-01T00:00:00</HiredDt> 
<Designation>SSE</Designation> 
<WorkLocation>Chennai</WorkLocation> 
<GroupNo>30021045</GroupNo> 
<SubGroupNo>A001</SubGroupNo> 
<SSN>010101010</SSN> 
<Class>Management</Class> 
<EULA>1</EULA> 
<Gender>M</Gender> 
<Type>PGA</Type> 
<PartAEffectiveDt>0001-01-01T00:00:00</PartAEffectiveDt> 
<PartBEffectiveDt>0001-01-01T00:00:00</PartBEffectiveDt> 
<IsDomesticPartner>false</IsDomesticPartner> 
<IsFTStudent>false</IsFTStudent> 
<GraduationDt>0001-01-01T00:00:00</GraduationDt> 
<CreditHours>-1</CreditHours> 
<IsDependentHandicapped>false</IsDependentHandicapped> 
<TerminationDt>0001-01-01T00:00:00</TerminationDt> 
<ReAssignedToCobra>false</ReAssignedToCobra> 
<CobraEffectiveDt>0001-01-01T00:00:00</CobraEffectiveDt> 
<RecEffectiveDt>2012-01-01T00:00:00</RecEffectiveDt> 
<RecTerminationDt>2012-12-31T00:00:00</RecTerminationDt> 
<CreatedOn>2012-03-02T14:57:47.687</CreatedOn> 
<CreatedBy>SPERIDIAN\sujeeth.anand</CreatedBy> 
<ModifiedOn>2012-03-07T10:05:14.28</ModifiedOn> 
<ModifiedBy>HR_MSMITH</ModifiedBy> 
<UserInfo> 
<AccessGroups/> 
<UserId>3</UserId> 
<ContactId>1-CCR1</ContactId> 
<Login>hr_MSmith</Login> 
<Password>cGFzc3dvcmQ=</Password> 
<LoginAttemptsCnt>0</LoginAttemptsCnt> 
<LoginLockedInd>0</LoginLockedInd> 
<AllowInternetUse>1</AllowInternetUse> 
<Active>-1</Active> 
<InActiveDt>0001-01-01T00:00:00</InActiveDt> 
<CreatedOn>0001-01-01T00:00:00</CreatedOn> 
<ModifiedOn>0001-01-01T00:00:00</ModifiedOn> 
<SessionId>B68F7D913FF44B8D9CB7B9F4686D469D</SessionId> 
<SessionData> 
<ROOT><SESSIONDATA><CLIENT_INFO><USER_ID>3</USER_ID><CONTACT_ID>83</CONTACT_ID><LOGIN_ID>hr_MSmith</LOGIN_ID><ROLE_ID>|7|</ROLE_ID><OBJECT_ACCESS>|01|03|0301|0302|0304|04|0401|0402|0403|0404|0405|0406|08|</OBJECT_ACCESS><FULL_NAME>Mary Smith</FULL_NAME></CLIENT_INFO><PAGE_VARS /><Messaging /></SESSIONDATA></ROOT> 
</SessionData> 
</UserInfo> 
<x001> 
<MoreInfo><countryCode>USA</countryCode><phoneExtension /><faxNumber>3152224321</faxNumber><subscriberId /><memberId>M01</memberId><title /></MoreInfo> 
</x001> 
<ContactRelations/> 
</ContactInfo> 
<EnrollmentPlans> 
<EnrolledPlan> 
<PackageId>1-90SBCPDP</PackageId> 
<PackageName>SimplyBlue Copay Deduct Plan</PackageName> 
<PackageCategory>Medical</PackageCategory> 
<CoverageLevel>EMP_SPOUSE</CoverageLevel> 
<CoverageLevelDesc>Employee & Spouse</CoverageLevelDesc> 
<CoverageAmt>243.33</CoverageAmt> 
<TotalCoverageAmt>737.36</TotalCoverageAmt> 
<InstallationRowId>28</InstallationRowId> 
<EffectiveDate>01/01/2013</EffectiveDate> 
<TerminationDate>12/31/2013</TerminationDate> 
<IsNew>false</IsNew> 
</EnrolledPlan> 
</EnrollmentPlans> 
<RowId>5</RowId> 
<ContactId>1-CCR1</ContactId> 
<Type>OPEN_ENROLL</Type> 
<OrgId>30021045</OrgId> 
<PlanSetupId>28</PlanSetupId> 
<EnrollInfoXml> 
<EnrollmentInfo><PersonalInfo><EmployeeID>M101</EmployeeID><FirstName>Mahesh</FirstName><MiddleName /><LastName>CN</LastName><DateOfBirth>03/02/1980</DateOfBirth><Gender>M</Gender><SSN>010101010</SSN><Email>mahesh.narayanan@speridian.com</Email><AddressLine1>address</AddressLine1><AddressLine2 /><AddressLine3 /><City>new city</City><State>VA</State><ZipCode>11111</ZipCode><HomePhone /><WorkPhone /></PersonalInfo><WorkInfo><Class>1-CLA1</Class><DateOfHire>03/01/2012</DateOfHire><Designation>SSE</Designation><WorkLocation>Chennai</WorkLocation></WorkInfo><SelectedPackages><Package Id="1-90SBCPDP" Category="Medical" CoverageLevel="EMP_SPOUSE" CoverageAmt="243.33" TotalCoverageAmt="737.36" InstallationRowId="28" EffectiveDate="01/01/2013" TerminationDate="12/31/2013"><Dependents><Dependent ExtContactId="REF-445"><FirstName>Rajesh</FirstName><MiddleName>R</MiddleName><LastName>Rai</LastName><DateOfBirth>01/03/1980</DateOfBirth><Gender>M</Gender><Relationship>DEP</Relationship><AddressLine1>address</AddressLine1><AddressLine2 /><AddressLine3 /><City>new city</City><State>VA</State><ZipCode>11111</ZipCode><HomePhone>4254545</HomePhone><MedicareNumber /><PartA_EffectiveDate /><PartB_EffectiveDate /><IsFullTimeStudent>False</IsFullTimeStudent><CollegeName /><ExpectedGraduationDate /><CreditHours /></Dependent></Dependents></Package></SelectedPackages></EnrollmentInfo> 
</EnrollInfoXml> 
<EffectiveDt>2013-01-01T00:00:00</EffectiveDt> 
<TerminationDt>2013-12-31T00:00:00</TerminationDt> 
<Status>CO</Status> 
<Active>1</Active> 
<TaskId>-1</TaskId> 
<CreatedOn>2012-03-12T11:09:09.21</CreatedOn> 
<CreatedBy>WSWIN7001\BRYMY DWCC6 G8YPG</CreatedBy> 
<ModifiedOn>2012-03-13T15:00:07.95</ModifiedOn> 
<ModifiedBy>hr_MSmith</ModifiedBy> 
<StatusDesc>Completed (Waiting for approval)</StatusDesc> 
<TotalPlanAmount>0</TotalPlanAmount> 
<TotalEmployeeContribution>0</TotalEmployeeContribution> 
</Enrollment> 

Answer 1

あなたがターゲットとしているのAndroidのバージョンは言及しなかったが、アンドロイドの現在のバージョンでは、次のコードでは、XMLからあなたの最初の名前を取得します。 Webサービスから取得したXMLにxml変数を設定する必要があります。結果はfirstName変数にあります。

import org.w3c.dom.Document; 
import org.w3c.dom.Node; 
import javax.xml.parsers.DocumentBuilder; 
import javax.xml.parsers.DocumentBuilderFactory; 
import javax.xml.xpath.XPath; 
import javax.xml.xpath.XPathConstants; 
import javax.xml.xpath.XPathFactory; 
import java.io.ByteArrayInputStream; 
import java.io.InputStream; 
import java.nio.charset.Charset; 

... 

    String xml = "<...>"; 
    String expression = "/Enrollment/FirstName"; 

    DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance(); 
    builderFactory.setNamespaceAware(true); 
    DocumentBuilder builder = builderFactory.newDocumentBuilder(); 
    InputStream in = new ByteArrayInputStream(xml.getBytes(Charset.forName("UTF-8"))); 
    Document document = builder.parse(in); 

    XPath xpath = XPathFactory.newInstance().newXPath(); 
    Node firstNameNode = (Node) xpath.evaluate(expression, document, XPathConstants.NODE); 
    String firstName = firstNameNode.getTextContent();