Question

我正在使用Spring Integration来读取文件FileReadingMessageSource，为了避免同一个文件被读取两次（或其他并发应用程序也读取它），我使用的是FileSystemPersistentAcceptOnceFileListFilter。

一切运行良好，它会在DB（MySQL）中保持文件的状态。问题是：当我尝试两次读取同一个文件时，我得到一个例外：

org.springframework.core.convert.support.DefaultConversionService.getSharedInstance()Lorg/springframework/core/convert/ConversionService;

有没有人面对同样的事情？谢谢！

详细例外：

SEVERE: java.lang.NoSuchMethodError: org.springframework.core.convert.support.DefaultConversionService.getSharedInstance()Lorg/springframework/core/convert/ConversionService;
    at org.springframework.jdbc.core.SingleColumnRowMapper.<init>(SingleColumnRowMapper.java:53)
    at org.springframework.jdbc.core.JdbcTemplate.getSingleColumnRowMapper(JdbcTemplate.java:1291)
    at org.springframework.jdbc.core.JdbcTemplate.queryForObject(JdbcTemplate.java:797)
    at org.springframework.integration.jdbc.metadata.JdbcMetadataStore.putIfAbsent(JdbcMetadataStore.java:134)
    at org.springframework.integration.file.filters.AbstractPersistentAcceptOnceFileListFilter.accept(AbstractPersistentAcceptOnceFileListFilter.java:77)
    at org.springframework.integration.file.filters.AbstractFileListFilter.filterFiles(AbstractFileListFilter.java:40)
    at org.springframework.integration.file.filters.CompositeFileListFilter.filterFiles(CompositeFileListFilter.java:108)
    at org.springframework.integration.file.DefaultDirectoryScanner.listFiles(DefaultDirectoryScanner.java:86)
    at org.springframework.integration.file.FileReadingMessageSource.scanInputDirectory(FileReadingMessageSource.java:293)
    at org.springframework.integration.file.FileReadingMessageSource.receive(FileReadingMessageSource.java:272)
    at org.springframework.integration.endpoint.SourcePollingChannelAdapter.receiveMessage(SourcePollingChannelAdapter.java:175)
    at org.springframework.integration.endpoint.AbstractPollingEndpoint.doPoll(AbstractPollingEndpoint.java:224)
    at org.springframework.integration.endpoint.AbstractPollingEndpoint.access$000(AbstractPollingEndpoint.java:57)
    at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:176)
    at org.springframework.integration.endpoint.AbstractPollingEndpoint$1.call(AbstractPollingEndpoint.java:173)
    at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller$1.run(AbstractPollingEndpoint.java:330)
    at org.springframework.integration.util.ErrorHandlingTaskExecutor$1.run(ErrorHandlingTaskExecutor.java:55)
    at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50)
    at org.springframework.integration.util.ErrorHandlingTaskExecutor.execute(ErrorHandlingTaskExecutor.java:51)
    at org.springframework.integration.endpoint.AbstractPollingEndpoint$Poller.run(AbstractPollingEndpoint.java:324)
    at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
    at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:514)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:299)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
    at java.base/java.lang.Thread.run(Thread.java:844)

Answer 1

java.lang.NoSuchMethodError: org.springframework.core.convert.support.DefaultConversionService.getSharedInstance()Lorg/springframework/core/convert/ConversionService;表示您使用不兼容的Spring Integration和Spring Framework版本。对于Spring Integration，您应该只依赖于传递依赖。或者甚至更好地使用Spring Boot依赖管理。

Answer 2

是的，对我来说这也是依赖性问题。当我在项目目录中看到库列表时，版本冲突。
我在项目中同时使用Spring-Security（4.2.5）和Spring框架（4.2.5）。
Maven正在下载“ spring-jdbc” 和“ spring-tx” 依赖项 （4.3.15） 版本的库。
其余所有依赖项默认为4.2.5。
所以我在pom.xml中手动将了 “ spring-jdbc”的maven依赖项添加到（4.2.5），解决了该问题

Spring Integration JDBC元数据存储

2 个答案: