问题
Iam trying to read xml file which has nested xml nodes using StaxEventItemReader and Jaxb2Marshaller. some where iam doing something wrong which result in exception.
Will provide sample XML file here
File.xml
<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>
And have Jaxb Classes for --> File, Transaction, MemberDetails, MemberDemoData, Address, AgentInfo,Package, PartD, LICSInfo, MedihealthData, PartA, PartB, ESignDate, EnrollmentDate, BillingData
Sample Class
File.java
@XmlAccessorType(XmlAccessType.FIELD) @XmlType(name = "", propOrder = { "fileDate", "recordCount", "Transaction" }) @XmlRootElement(name = "File") class File{ @XmlElement(name = "FileDate", required = true) protected String fileDate; @XmlElement(name = "RecordCount", required = true) protected String recordCount; @XmlElement(name = "Transaction") protected List<Transaction> transaction; //setters and getters }
Where File.java is root class for all xml elements
Repeated element in File is Transaction
Transaction.java
@XmlAccessorType(XmlAccessType.FIELD) @XmlType(name = "", propOrder = { "recordID", "memberDetails" }) @XmlRootElement(name = "MPTransaction") public class Transaction { @XmlElement(name = "RecordID", required = true) protected String recordID; @XmlElement(name = "MemberDetails", required = true) protected MemberDetails memberDetails; // setter and getter }
Now I have written the ItemReader method in my SpringBatch
ItemReader method to read File.xml
@Bean
@StepScope
public ItemReader<File> fileXmlReader(@Value("#{stepExecution}") StepExecution stepExecution) {
StaxEventItemReader<File> xmlFileReader = new StaxEventItemReader<>();
xmlFileReader.setResource(new ClassPathResource("/File.xml"));
xmlFileReader.setFragmentRootElementNames(new String[] {"Transaction" , "MemberDetails" ,
"MemberDemoData", "Address" ,"AgentInfo","Package" , "PartD" ,"LICSInfo" , "MedihealthData",
"PartA", "PartB","ESignDate","EnrollmentDate","BillingData"} );
Jaxb2Marshaller marshaller = new Jaxb2Marshaller();
marshaller.setClassesToBeBound(Transaction.class,MemberDetails.class,
MemberDemoData.class,Address.class,AgentInfo.class,Package.class,
PartD.class,LICSInfo.class,MedihealthData.class,PartA.class,PartB.class,
ESignDate.class,EnrollmentDate.class,BillingData.class);
xmlFileReader.setUnmarshaller(marshaller);
return xmlFileReader;
}
If I run my Batch iam getting the below exception. Please help me in identifying where iam going wrong ?
java.lang.NullPointerException
at org.springframework.batch.item.xml.StaxEventItemReader.moveCursorToNextFragment(StaxEventItemReader.java:151)
at org.springframework.batch.item.xml.StaxEventItemReader.doRead(StaxEventItemReader.java:228)
at org.springframework.batch.item.support.AbstractItemCountingItemStreamItemReader.read(AbstractItemCountingItemStreamItemReader.java:88)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:133)
at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:121)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy34.read(Unknown Source)
at org.springframework.batch.core.step.item.SimpleChunkProvider.doRead(SimpleChunkProvider.java:91)
at org.springframework.batch.core.step.item.SimpleChunkProvider.read(SimpleChunkProvider.java:155)
at org.springframework.batch.core.step.item.SimpleChunkProvider$1.doInIteration(SimpleChunkProvider.java:114)
at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:368)
at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215)
at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144)
at org.springframework.batch.core.step.item.SimpleChunkProvider.provide(SimpleChunkProvider.java:108)
at org.springframework.batch.core.step.item.ChunkOrientedTasklet.execute(ChunkOrientedTasklet.java:69)
at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:406)
at org.springframework.batch.core.step.tasklet.TaskletStep$ChunkTransactionCallback.doInTransaction(TaskletStep.java:330)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:133)
at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:271)
at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:77)
at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:368)
at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215)
at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144)
at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:257)
at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:198)
at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:148)
at org.springframework.batch.core.job.AbstractJob.handleStep(AbstractJob.java:386)
at org.springframework.batch.core.job.SimpleJob.doExecute(SimpleJob.java:135)
at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:304)
at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:135)
at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50)
at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:128)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$PassthruAdvice.invoke(SimpleBatchConfiguration.java:127)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
at com.sun.proxy.$Proxy37.run(Unknown Source)
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.execute(JobLauncherCommandLineRunner.java:210)
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.executeLocalJobs(JobLauncherCommandLineRunner.java:227)
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.launchJobFromProperties(JobLauncherCommandLineRunner.java:121)
at org.springframework.boot.autoconfigure.batch.JobLauncherCommandLineRunner.run(JobLauncherCommandLineRunner.java:115)
at org.springframework.boot.SpringApplication.runCommandLineRunners(SpringApplication.java:672)
at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:690)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:321)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
at com.bcn.medicareEnrollment.Runner.main(Runner.java)
Please help me out to sort out this issue. Iam new to Spring batch . when I run this xml reader logic im getting exception.
来源：https://stackoverflow.com/questions/42903518/spring-batch-staxitemreader-jaxb-to-read-multiple-nested-xml-nodes