没有找到使用Spring MatchingResourcePatternresolver的资源

Question

   @Bean
    @StepScope
    public MultiResourceItemReader<PosRow> multiResourceItemReader() {
        MultiResourceItemReader<PosRow> resourceItemReader = new MultiResourceItemReader<>();
        Resource[] resources = new Resource[0];
        String path = "file:" + filePath + File.separator + filePattern + "*";
        log.info("Looking for resource files matching {}", path);
        try {
            PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
            resources = resolver.getResources(path);
        } catch (IOException e) {
            log.error("Problem with getting resource files ", e);
        }
        resourceItemReader.setResources(resources);
        resourceItemReader.setDelegate(posRowReader());
        return resourceItemReader;
    }

即使位置中有文件，我也无法获得资源。在上一步中，文件被复制，然后我尝试使用PathMatchingResourcePatternResolver查找文件。我在控制台上打印以下印刷：

 c.s.p.p.batch.config.BatchConfiguration  : Looking for resource files matching file:C:DevworkspacebatchsrcmainresourceslocalPathPositionFile*
o.s.b.item.file.MultiResourceItemReader  : No resources to read. Set strict=true if this should be an error condition.

我可以看到位置模式已正确构造。

filePath和filePattern在application.properties文件中看起来像这样：

positionFile.local-path=C:\Dev\workspace\batch\src\main\resources\localPath
positionFile.patternName=PositionFile

Answer 1

您未设置 classloader in pathmatchingresorcepatternresolver

ClassLoader cl = this.getClass().getClassLoader();
        ResourcePatternResolver resolver = new PathMatchingResourcePatternResolver(cl);

Answer 2

我遇到了相同的问题，经过一些挖掘，似乎pathmatchingresourcepatternresolver有时会出现背部斜线解决的问题，有时有时可以正常工作

为了获得更高的可靠性，我解决了该问题，用前斜线代替了所有背部斜线

尝试以下操作：

PathMatchingResourcePatternResolver resolver = new PathMatchingResourcePatternResolver();
path = path.replace("\", "/");
resources = resolver.getResources(path);

nb：file.separator在Windows Platform上也会发生问题