绝对。您可以将JDBC
ItemReader或JPA
ItemReader与一起使用，
ColumnMapRowMapper以检索
Map结果集。您可以使用它
FlatFileItemWriter简单地以您喜欢的任何格式输出数据（使用提供的类很容易定界；固定宽度表示编写一个类以将转换
Map为固定宽度字符串）。
我经常在Spring Batch中执行此操作，而这几乎只是布线的问题。
除了定义资源，数据源和提供SQL之外，这种（未经测试的）配置几乎可以完全满足您的要求：
<?xml version="1.0" encoding="UTF-8"?><beans:beans xmlns="http://www.springframework.org/schema/batch" xmlns:beans="http://www.springframework.org/schema/beans" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:p="http://www.springframework.org/schema/p" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:util="http://www.springframework.org/schema/util" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd http://www.springframework.org/schema/batch http://www.springframework.org/schema/batch/spring-batch-2.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.0.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.0.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-2.0.xsd"> <job-repository id="jobRepository" data-source="jobDataSource"/> <beans:bean id="transactionManager" p:dataSource-ref="jobDataSource" /> <beans:bean id="extractReader" scope="step" > <beans:property name="dataSource" ref="appDataSource" /> <beans:property name="rowMapper"> <beans:bean /> </beans:property> <beans:property name="sql"> <beans:value> . . . </beans:value> </beans:property> </beans:bean> <beans:bean id="extractWriter" scope="step"> <beans:property name="resource" ref="fileResource" /> <beans:property name="lineAggregator"> <beans:bean > <beans:property name="delimiter"> <util:constant static-field="org.springframework.batch.item.file.transform.DelimitedLineTokenizer.DELIMITER_TAB" /> </beans:property> <beans:property name="fieldExtractor"> <beans:bean /> </beans:property> </beans:bean> </beans:property> </beans:bean> <job id="extractJob" restartable="true"> <step id="extractStep" > <tasklet> <chunk reader="extractReader" writer="extractWriter" commit-interval="100" /> </tasklet> </step> </job></beans:beans>
