Spring Batch And File Upload - jsf

Question

I am working on a Spring Batch project, this is the configuration of my Reader.
<bean id="personneReaderCSV" class="org.springframework.batch.item.file.FlatFileItemReader" >
<property name="resource" value="input/personne.txt" />
<property name="lineMapper">
<bean class="org.springframework.batch.item.file.mapping.DefaultLineMapper">
<property name="lineTokenizer">
<bean class="org.springframework.batch.item.file.transform.DelimitedLineTokenizer">
<property name="delimiter" value=","/>
<property name="names" value="id,nom,prenom,civilite" />
</bean>
</property>
<property name="fieldSetMapper">
<bean class="org.springframework.batch.item.file.mapping.BeanWrapperFieldSetMapper">
<property name="targetType" value="ma.ensa.Personne" />
</bean>
</property>
</bean>
</property>
</bean>
Now I want to use a file Upload with JSF to choose the file the I want Read data from, so how I can do it to make the value of the property resource dynamic.
Help and Thank's.

Answer 1

You may want to parameterize the input filename in your job by setting a property in the JobParameters of the job and then injecting it into your reader bean in this way:
<bean id="personneReaderCSV" class="org.springframework.batch.item.file.FlatFileItemReader" scope="step">
<property name="resource" value="#{jobParameters[filename]}" />
<!-- ... -->
</bean>
Please note that you should also add scope="step" to your bean.
This is called late binding and is illustrated in §5.4 of the official spring-batch documentation.

Answer 2

Spring Boot update:
#Bean
#StepScope
public FlatFileItemReader<CarInfo> itemReader(#Value("#{jobParameters['fileName']}") String fileLocation) {
FlatFileItemReader<CarInfo> flatFileItemReader = new FlatFileItemReader<>();
flatFileItemReader.setResource(new FileSystemResource(fileLocation));
flatFileItemReader.setName("CSV-Reader");
flatFileItemReader.setLinesToSkip(1);
flatFileItemReader.setLineMapper(lineMapper());
return flatFileItemReader;
}
I hope you can have the Multipartfile either saved into the resource folder and share it as Resource or else find a way to pass that as resource object to the param list. Then get it injected here shown above