基于spring batch读取db2数据poc这个schema下covr表的示例代码,还有对应的数据库配置文件代码
时间: 2024-02-26 14:56:39 浏览: 24
以下是基于Spring Batch读取DB2数据的POC示例代码以及对应的数据库配置文件代码:
首先是数据库配置文件(application.properties)代码:
```
spring.datasource.url=jdbc:db2://hostname:port/databaseName
spring.datasource.username=yourUsername
spring.datasource.password=yourPassword
spring.datasource.driverClassName=com.ibm.db2.jcc.DB2Driver
```
然后是基于Spring Batch读取DB2数据的示例代码:
```
@Configuration
@EnableBatchProcessing
public class BatchConfiguration {
@Autowired
public JobBuilderFactory jobBuilderFactory;
@Autowired
public StepBuilderFactory stepBuilderFactory;
@Autowired
public DataSource dataSource;
@Bean
public JdbcCursorItemReader<Coverage> reader() {
JdbcCursorItemReader<Coverage> reader = new JdbcCursorItemReader<>();
reader.setDataSource(dataSource);
reader.setSql("SELECT * FROM poc.covr");
reader.setRowMapper(new CoverageRowMapper());
return reader;
}
public class CoverageRowMapper implements RowMapper<Coverage> {
@Override
public Coverage mapRow(ResultSet rs, int rowNum) throws SQLException {
Coverage coverage = new Coverage();
coverage.setId(rs.getInt("id"));
coverage.setName(rs.getString("name"));
coverage.setDescription(rs.getString("description"));
return coverage;
}
}
@Bean
public CoverageItemProcessor processor() {
return new CoverageItemProcessor();
}
@Bean
public JdbcBatchItemWriter<Coverage> writer() {
JdbcBatchItemWriter<Coverage> writer = new JdbcBatchItemWriter<>();
writer.setItemSqlParameterSourceProvider(new BeanPropertyItemSqlParameterSourceProvider<>());
writer.setSql("INSERT INTO poc.covr (id, name, description) VALUES (:id, :name, :description)");
writer.setDataSource(dataSource);
return writer;
}
@Bean
public Step step1() {
return stepBuilderFactory.get("step1")
.<Coverage, Coverage> chunk(10)
.reader(reader())
.processor(processor())
.writer(writer())
.build();
}
@Bean
public Job importUserJob(JobCompletionNotificationListener listener) {
return jobBuilderFactory.get("importUserJob")
.incrementer(new RunIdIncrementer())
.listener(listener)
.flow(step1())
.end()
.build();
}
}
```
这段代码中,我们首先配置了数据源,并使用JdbcCursorItemReader从DB2数据库中读取covr表中的数据,然后使用自定义的CoverageRowMapper将ResultSet中的数据映射到Coverage对象中。接着使用CoverageItemProcessor对Coverage对象进行处理,最后使用JdbcBatchItemWriter将处理后的数据写入数据库中。
需要注意的是,这里使用了BeanPropertyItemSqlParameterSourceProvider来将Coverage对象的属性值和SQL语句中的参数名对应起来,因此需要在Coverage类中定义id、name和description属性。