我正在将一个Spring Boot项目与一个Spring Batch和Data JPA项目集成。与任务和数据配置相关的所有内容都正确,唯一问题是将作业写入结果持久化到数据库中。在读取并处理文件后,我无法将其写入MySQL数据库。没有任何错误,但也没有插入。有趣的是我的数据源已经配置好了。因为在插入之前,我可以从数据库中获取样本记录。请帮助我解决这个问题。
我的application.properties:
spring.datasource.url = jdbc:mysql://localhost:3306/batchtest? characterEncoding=UTF-8&autoReconnect=true
spring.datasource.username = root
spring.datasource.password = root
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
批量配置:
@Configuration
@EnableBatchProcessing
public class BatchConfiguration {
@Autowired
public JobBuilderFactory jobBuilderFactory;
@Autowired
public StepBuilderFactory stepBuilderFactory;
@Bean
public ResourcelessTransactionManager transactionManager() {
return new ResourcelessTransactionManager();
}
@Bean
public JobRepository jobRepository(ResourcelessTransactionManager transactionManager) throws Exception {
MapJobRepositoryFactoryBean mapJobRepositoryFactoryBean = new MapJobRepositoryFactoryBean(transactionManager);
mapJobRepositoryFactoryBean.setTransactionManager(transactionManager);
return mapJobRepositoryFactoryBean.getObject();
}
@Bean
public SimpleJobLauncher jobLauncher(JobRepository jobRepository) {
SimpleJobLauncher simpleJobLauncher = new SimpleJobLauncher();
simpleJobLauncher.setJobRepository(jobRepository);
return simpleJobLauncher;
}
@Bean
public FlatFileItemReader<Person> reader() {
FlatFileItemReader<Person> reader = new FlatFileItemReader<Person>();
reader.setResource(new ClassPathResource("sample-data.csv"));
reader.setLineMapper(new DefaultLineMapper<Person>() {{
setLineTokenizer(new DelimitedLineTokenizer() {{
setNames(new String[] { "firstName", "lastName" });
}});
setFieldSetMapper(new BeanWrapperFieldSetMapper<Person>() {{
setTargetType(Person.class);
}});
}});
return reader;
}
@Bean
public PersonItemProcessor processor() {
return new PersonItemProcessor();
}
@Bean
public ItemWriter<Person> writer() throws Exception {
return new PersonWriter();
}
@Bean
public Job importUserJob() throws Exception{
return jobBuilderFactory.get("importUserJob")
.incrementer(new RunIdIncrementer())
.flow(step1())
.end()
.build();
}
@Bean
public Step step1() throws Exception{
return stepBuilderFactory.get("step1")
.<Person, Person> chunk(1)
.reader(reader())
.processor(processor())
.writer(writer())
.build();
}
Dao类:
public interface PersonDao extends CrudRepository<Person,Integer> {
}
作者类:
public class PersonWriter implements ItemWriter<Person> {
@Autowired
PersonDao personDao;
@Override
public void write(List<? extends Person> items) throws Exception {
LOGGER.info("Received the information of {} students", items.size());
for(Person person:items)
{
LOGGER.info(String.format("inserting for customre %s %s", person.getFirstName(), person.getLastName()));
Person tempPerson = personDao.findOne(1);
personDao.save(person) ;
LOGGER.info(String.format("person id : %d",person.getId()));
}
}
tempPerson是用于测试jpa数据的对象。它从数据库中获取一个id为1的人物对象,但在下一行没有插入到数据库中也没有出现错误,只是执行该行并继续循环。