如何使用StaxEventItemReader在Spring Batch的複雜XML

Question

請幫我寫ItemReader（）

<File> 
     <FileDate>05/28/2016</FileDate> 
     <RecordCount>75</RecordCount> 
     <Transaction> 
      <RecordID>1</RecordID> 
      <MemberDetails> 
       <Id>A2334549</Id> 
       <MemberDemoData> 
        <SubID>89890734548557</SubID> 
        <MemberSuffix>01</MemberSuffix> 
        <SSN>XXXXX</SSN> 
        <CategoryCode>B</CategoryCode> 
        <Gender>F</Gender> 
        <LastName>Naaz</LastName> 
        <FirstName>Affu</FirstName> 
        <MiddleInitial>H</MiddleInitial> 
        <BirthDate>04/02/1990</BirthDate> 
        <HICNumber>4567376739A</HICNumber> 
        <PhoneNumber>894567893</PhoneNumber> 
        <ProviderID>09678546</ProviderID> 
        <PCPOverride>N</PCPOverride> 
        <Address> 
         <AddressType>HOME</AddressType> 
         <Address1>2226 Indira nagar RD</Address1> 
         <City>Noida</City> 
         <State>Delhi</State> 
         <Zip>525001</Zip> 
         <County>India</County> 
        </Address> 
        <Address> 
         <AddressType>MAIL</AddressType> 
         <Address1>2226 Indira nagar RD</Address1> 
         <City>Noida</City> 
         <State>Delhi</State> 
         <Zip>525001</Zip> 
         <County>India</County> 
        </Address> 
        <AgentInfo> 
         <MailAgentNo>40</MailAgentNo> 
         <AgentNo>67894</AgentNo> 
        </AgentInfo> 
       </MemberDemoData> 
       <Package> 
       <Plan>Yu8883</Plan> 
       <PlanId>009</PlanId> 
       <SegmentId>104</SegmentId> 
       <Group>000987666</Group> 
       <SubGroup>B004</SubGroup> 
       <Class>0004</Class> 
       <PartD> 
        <BIN>789034</BIN> 
        <PCN>*******</RxPCN> 
       </PartD> 
       <EffectiveDate>09/01/2016/01/2016</EffectiveDate> 
       <TerminationDate>12/31/2016</TerminationDate> 
      </Package> 
      <LICSInfo> 
       <SubsidyLevel>100</SubsidyLevel> 
       <CopayCategory>1</CopayCategory> 
       <SubsidyLevelStartDate>08/11/2016</SubsidyLevelStartDate> 
      </LICSInfo> 
      <MedihealthData> 
        <PartA> 
         <EffectiveDate>02/01/2008</EffectiveDate> 
        </PartA> 
        <PartB> 
         <EffectiveDate>02/01/2008</EffectiveDate> 
        </PartB> 
        <ESignDate> 
         <EffectiveDate>08/16/2016</EffectiveDate> 
        </ESignDate> 
      <ElectionPeriod>S</ElectionPeriod> 
        <EnrollmentDate> 
         <EffectiveDate>08/01/2016</EffectiveDate> 
        </EnrollmentDate> 
       </MedihealthData> 
       <BillingData> 
        <PremiumWithHold>D</PremiumWithHold> 
       </BillingData> 
      </MemberDetails> 
     </Transaction> 
     <Transaction> 
     ------- 
     </Transaction> 
     <Transaction> 
     ------ 
     </Transaction> 
     <Transaction> 
     ------- 
     </Transaction> 
    </File> 

我JAXB生成的類文件，事務，MemberDetails，MemberDemoData，地址，AgentInfo，包裝， PartD，LICSInfo，MedihealthData，PartA，PartB，ESignDate，EnrollmentDate，BillingData

現在在下面的ItemReader方法中代替「？」我應該使用什麼類名稱。請幫幫我。

public ItemReader<?> fileXmlReader(@Value("#{stepExecution}") StepExecution stepExecution) { 

      StaxEventItemReader<?> xmlFileReader = new StaxEventItemReader<>(); 

      xmlFileReader.setResource(new ClassPathResource("/File.xml")); 

      xmlFileReader.setFragmentRootElementNames(new String[] {?}); (or) 
      xmlFileReader.setFragmentRootElementName(?) 

      Jaxb2Marshaller marshaller = new Jaxb2Marshaller(); 
      marshaller.setClassesToBeBound(?); 

      xmlFileReader.setUnmarshaller(marshaller); 

      return xmlFileReader; 

    } 

Answer 1

@Bean 
public StaxEventItemReader<Entity> reader() { 

    XStreamMarshaller unmarshaller = new XStreamMarshaller(); 

    Map<String, Class> aliases = new HashMap<>(); 
    aliases.put("File", Entity.class); 

    unmarshaller.setAliases(aliases); 

    StaxEventItemReader<Customer> reader = new StaxEventItemReader<>(); 

    reader.setResource(new ClassPathResource("/data/file.xml")); 
    reader.setFragmentRootElementName("file"); 
    reader.setUnmarshaller(unmarshaller); 


    return reader; 
}