Java一分钟之-Spring Batch：批量处理框架

Spring Batch是一个轻量级的、完整的批处理框架，用于开发企业级批处理应用。以下是一个简单的Spring Batch作业配置的例子：

import org.springframework.batch.core.Job;
import org.springframework.batch.core.Step;
import org.springframework.batch.core.StepContribution;
import org.springframework.batch.core.configuration.annotation.JobBuilderFactory;
import org.springframework.batch.core.configuration.annotation.StepBuilderFactory;
import org.springframework.batch.core.launch.JobLauncher;
import org.springframework.batch.core.scope.context.ChunkContext;
import org.springframework.batch.core.step.tasklet.Tasklet;
import org.springframework.batch.core.launch.support.RunIdIncrementer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
 
@Component
public class SampleBatchJobConfig {
 
    private JobBuilderFactory jobs;
    private StepBuilderFactory steps;
 
    @Autowired
    public SampleBatchJobConfig(JobBuilderFactory jobs, StepBuilderFactory steps) {
        this.jobs = jobs;
        this.steps = steps;
    }
 
    @Autowired
    private JobLauncher jobLauncher;
 
    @Autowired
    private Tasklet sampleTasklet;
 
    public Job getSampleJob() {
        return jobs.get("sampleJob")
                .incrementer(new RunIdIncrementer())
                .flow(getSampleStep())
                .end()
                .build();
    }
 
    private Step getSampleStep() {
        return steps.get("sampleStep")
                .tasklet(sampleTasklet)
                .build();
    }
 
    public void launch() {
        try {
            jobLauncher.run(getSampleJob(), new JobParameters());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}
 
@Component
public class SampleTasklet implements Tasklet {
    @Override
    public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {
        // 执行批处理任务的逻辑
        System.out.println("Batch Task Executed");
        return RepeatStatus.FINISHED;
    }
}

这个例子中，我们定义了一个简单的Spring Batch作业，包含一个步骤，该步骤使用了一个简单的Tasklet来打印一条消息。这个作业可以通过JobLauncher被触发执行。这个例子展示了如何使用Spring Batch来创建和运行一个简单的批处理作业。