基于springbatch,写一段代码,通过readr读取person,并且判断person为男性在传导到writer进行数据写入
时间: 2024-03-31 20:38:03 浏览: 56
好的,下面是代码示例:
```
@Component
public class PersonItemProcessor implements ItemProcessor<Person, Person> {
@Override
public Person process(Person person) throws Exception {
if (person.getGender().equalsIgnoreCase("Male")) {
return person;
} else {
return null;
}
}
}
@Configuration
@EnableBatchProcessing
public class BatchConfig {
@Autowired
private JobBuilderFactory jobBuilderFactory;
@Autowired
private StepBuilderFactory stepBuilderFactory;
@Autowired
private PersonItemProcessor personItemProcessor;
@Bean
public FlatFileItemReader<Person> reader() {
FlatFileItemReader<Person> reader = new FlatFileItemReader<>();
reader.setResource(new ClassPathResource("persons.csv"));
reader.setLineMapper(new DefaultLineMapper<Person>() {{
setLineTokenizer(new DelimitedLineTokenizer() {{
setNames(new String[]{"name", "age", "gender"});
}});
setFieldSetMapper(new BeanWrapperFieldSetMapper<Person>() {{
setTargetType(Person.class);
}});
}});
return reader;
}
@Bean
public ItemWriter<Person> writer() {
return new ItemWriter<Person>() {
@Override
public void write(List<? extends Person> persons) throws Exception {
for (Person person : persons) {
System.out.println("Writing person: " + person.getName());
}
}
};
}
@Bean
public Step step1() {
return stepBuilderFactory.get("step1")
.<Person, Person>chunk(10)
.reader(reader())
.processor(personItemProcessor)
.writer(writer())
.build();
}
@Bean
public Job job() {
return jobBuilderFactory.get("job")
.incrementer(new RunIdIncrementer())
.flow(step1())
.end()
.build();
}
}
```
以上代码中,我们定义了一个 `PersonItemProcessor` 类,用于对读入的 `Person` 实例进行处理。在其中,我们判断 `Person` 的性别是否为男性,如果是,就返回该实例,否则返回 `null`。
接下来,我们使用 `FlatFileItemReader` 读取 CSV 文件中的 `Person` 数据,并将其传递给 `PersonItemProcessor` 进行处理。处理后的数据会被传递给 `ItemWriter` 进行写入。
最后,我们将读取、处理和写入这三个步骤组装成一个 `Step`,并将其传递给 `Job` 进行执行。
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