SpringBatch介绍:
SpringBatch 是一个大数据量的并行处理框架。通常用于数据的离线迁移,和数据处理,⽀持事务、并发、流程、监控、纵向和横向扩展,提供统⼀的接⼝管理和任务管理;SpringBatch是SpringSource和埃森哲为了统一业界并行处理标准为广大开发者提供方便开发的一套框架。
官方地址:github.com/spring-projects/spring-batch
快速入门
pom.xml 添加
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-batch</artifactId> </dependency>
创建BatchConfig(可以是其他类名)
@Configuration @EnableBatchProcessing public class BatchConfig { // tag::readerwriterprocessor[] @Bean public FlatFileItemReader<Person> flatFileItemReader() { FlatFileItemReader<Person> reader = new FlatFileItemReader<>(); reader.setResource(new ClassPathResource("sample-data.csv")); FixedLengthTokenizer fixedLengthTokenizer = new FixedLengthTokenizer(); reader.setLineMapper(new DefaultLineMapper<Person>() {{ setLineTokenizer(new DelimitedLineTokenizer() {{ setNames(new String[]{"firstName", "lastName"}); }}); setFieldSetMapper(new BeanWrapperFieldSetMapper<Person>() {{ setTargetType(Person.class); }}); }}); return reader; } @Bean public JdbcPagingItemReader<Person> jdbcPagingItemReader(DataSource dataSource) { JdbcPagingItemReader<Person> reader = new JdbcPagingItemReader<>(); reader.setDataSource(dataSource); reader.setFetchSize(100); reader.setQueryProvider(new MySqlPagingQueryProvider() {{ setSelectClause("SELECT person_id,first_name,last_name"); setFromClause("from people"); setWhereClause("last_name=:lastName"); setSortKeys(new HashMap<String, Order>() {{ put("person_id", Order.ASCENDING); }}); }}); reader.setParameterValues(new HashMap<String, Object>() {{ put("lastName", "DOE"); }}); reader.setRowMapper(new BeanPropertyRowMapper<>(Person.class)); return reader; } @Bean public JdbcBatchItemWriter<Person> jdbcBatchItemWriter(DataSource dataSource) { JdbcBatchItemWriter<Person> writer = new JdbcBatchItemWriter<>(); writer.setItemSqlParameterSourceProvider(new BeanPropertyItemSqlParameterSourceProvider<>()); writer.setSql("INSERT INTO people (first_name, last_name) VALUES (:firstName, :lastName)"); writer.setDataSource(dataSource); return writer; } /*@Bean public FlatFileItemWriter<Person> flatFileItemWriter(DataSource dataSource) { FlatFileItemWriter<Person> writer = new FlatFileItemWriter<>(); writer.setAppendAllowed(true); writer.setEncoding("UTF-8"); // writer.set(dataSource); return writer; }*/ // end::readerwriterprocessor[] // tag::jobstep[] @Bean public Job importUserJob(JobBuilderFactory jobBuilderFactory, JobCompletionNotificationListener listener, Step step) { return jobBuilderFactory.get("importUserJob") .incrementer(new RunIdIncrementer()) .listener(listener) .start(step) .build(); } @Bean public Step step1(StepBuilderFactory stepBuilderFactory, PersonItemProcessor processor, ItemWriter jdbcBatchItemWriter, ItemReader flatFileItemReader) { /*CompositeItemProcessor compositeItemProcessor = new CompositeItemProcessor(); compositeItemProcessor.setDelegates(Lists.newArrayList(processor, processor));*/ return stepBuilderFactory.get("step1") .<Person, Person>chunk(10) .reader(flatFileItemReader) .processor(processor) .writer(jdbcBatchItemWriter) .build(); } // end::jobstep[] }
Spring Batch的分层架构
Spring Batch执行流程
总结
以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作能带来一定的帮助,如果有疑问大家可以留言交流,谢谢大家对呐喊教程的支持。
声明:本文内容来源于网络,版权归原作者所有,内容由互联网用户自发贡献自行上传,本网站不拥有所有权,未作人工编辑处理,也不承担相关法律责任。如果您发现有涉嫌版权的内容,欢迎发送邮件至:notice#nhooo.com(发邮件时,请将#更换为@)进行举报,并提供相关证据,一经查实,本站将立刻删除涉嫌侵权内容。