spring batch示例检查update如果记录存在则插入

@Configuration
@EnableBatchProcessing
public class BatchConfiguration {

    @Autowired
    private JobBuilderFactory jobBuilderFactory;

    @Autowired
    private StepBuilderFactory stepBuilderFactory;

    @Autowired
    private DataSource dataSource;

    @Bean
    public ItemReader<Record> itemReader() {
        JdbcCursorItemReader<Record> reader = new JdbcCursorItemReader<>();
        reader.setDataSource(dataSource);
        reader.setSql("SELECT * FROM records WHERE id = :id");
        reader.setRowMapper(new BeanPropertyRowMapper<>(Record.class));
        reader.setPreparedStatementSetter(new ArgumentPreparedStatementSetter(new Object[]{1}));
        return reader;
    }

    @Bean
    public ItemProcessor<Record, Record> itemProcessor() {
        return new RecordProcessor();
    }

    @Bean
    public ItemWriter<Record> itemWriter() {
        JdbcBatchItemWriter<Record> writer = new JdbcBatchItemWriter<>();
        writer.setDataSource(dataSource);
        writer.setSql("INSERT INTO records (id, name) VALUES (:id, :name)");
        writer.setItemSqlParameterSourceProvider(new BeanPropertyItemSqlParameterSourceProvider<>());
        return writer;
    }

    @Bean
    public Step step(ItemReader<Record> itemReader, ItemProcessor<Record, Record> itemProcessor, ItemWriter<Record> itemWriter) {
        return stepBuilderFactory.get("step")
                .<Record, Record>chunk(10)
                .reader(itemReader)
                .processor(itemProcessor)
                .writer(itemWriter)
                .build();
    }

    @Bean
    public Job job(Step step) {
        return jobBuilderFactory.get("job")
                .incrementer(new RunIdIncrementer())
                .flow(step)
                .end()
                .build();
    }
}

public class RecordProcessor implements ItemProcessor<Record, Record> {

    @Override
    public Record process(Record item) throws Exception {
        // 检查记录是否存在
        if (recordExists(item.getId())) {
            // 更新记录
            updateRecord(item);
        } else {
            // 插入记录
            insertRecord(item);
        }
        return item;
    }

    private boolean recordExists(int id) {
        // 检查记录是否存在的逻辑
        // 返回true表示记录存在，返回false表示记录不存在
    }

    private void updateRecord(Record item) {
        // 更新记录的逻辑
    }

    private void insertRecord(Record item) {
        // 插入记录的逻辑
    }
}

public class Record {
    private int id;
    private String name;

    // 省略getter和setter方法
}