Shulou(Shulou.com)06/03 Report--

Summary of Spring-batch Learning (4)

I. introduction to ItemWriter

1. For read, it is a circular read in units of item, while for writer, it is written in blocks in units of chunk.

two。 Example (let's give a small example to understand its writer principle):

Code:

OutOverViewApplication

Package com.dhcc.batch.batchDemo.output.outview;import org.springframework.batch.core.configuration.annotation.EnableBatchProcessing;import org.springframework.boot.SpringApplication;import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication@EnableBatchProcessingpublic class OutOverViewApplication {public static void main (String [] args) {SpringApplication.run (OutOverViewApplication.class, args);}}

OutputViewItemWriterConfiguration

Package com.dhcc.batch.batchDemo.output.outview;import java.util.ArrayList;import java.util.List;import org.springframework.batch.core.Job;import org.springframework.batch.core.Step;import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;import org.springframework.batch.core.configuration.annotation.StepScope;import org.springframework.batch.item.ItemWriter;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.beans.factory.annotation.Qualifier Import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration;@Configurationpublic class OutputViewItemWriterConfiguration {@ Autowired private JobBuilderFactory jobBuilderFactory; @ Autowired private StepBuilderFactory stepBuilderFactory; @ Autowired @ Qualifier ("OutputViewItemWriter") private ItemWriter

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