java 如何使用 Camel 组件 File2 中的包含参数按扩展名过滤文件
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How to filter files by extensions using include parameter in Camel component File2
提问by Dmitrii Borovoi
I need the simplest filter by extension: f.e. file 20120523.173227.CustomerMaster05092012.QWERTY.xml route:
我需要最简单的按扩展名过滤：fe 文件 20120523.173227.CustomerMaster05092012.QWERTY.xml 路由：
<from uri="file://{{fdr.folder.working.url}}&include=*.xml"/>
doesn't work:
不起作用：
Dangling meta character '*' near index 0
索引 0 附近的悬空元字符“*”
WARN - file://root_folder/working/) [FileConsumer] Consumer Consumer[file://root_folder/working/?delay=1000&delete=true&idempotent=false&include=*.xml&initialDelay=1000&readLock=changed] failed polling endpoint: Endpoint[file://root_folder/working/?delay=1000&delete=true&idempotent=false&include=*.xml&initialDelay=1000&readLock=changed]. Will try again at next poll. Caused by: [java.util.regex.PatternSyntaxException - Dangling meta character '*' near index 0
*.xml
^]
java.util.regex.PatternSyntaxException: Dangling meta character '*' near index 0
*.xml
^
at java.util.regex.Pattern.error(Pattern.java:1713)
at java.util.regex.Pattern.sequence(Pattern.java:1878)
at java.util.regex.Pattern.expr(Pattern.java:1752)
at java.util.regex.Pattern.compile(Pattern.java:1460)
at java.util.regex.Pattern.<init>(Pattern.java:1133)
at java.util.regex.Pattern.compile(Pattern.java:823)
at java.util.regex.Pattern.matches(Pattern.java:928)
at java.lang.String.matches(String.java:2090)
at org.apache.camel.component.file.GenericFileConsumer.isMatched(GenericFileConsumer.java:458)
at org.apache.camel.component.file.GenericFileConsumer.isValidFile(GenericFileConsumer.java:395)
at org.apache.camel.component.file.FileConsumer.pollDirectory(FileConsumer.java:94)
at org.apache.camel.component.file.GenericFileConsumer.poll(GenericFileConsumer.java:107)
at org.apache.camel.impl.ScheduledPollConsumer.doRun(ScheduledPollConsumer.java:142)
at org.apache.camel.impl.ScheduledPollConsumer.run(ScheduledPollConsumer.java:92)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access1(ScheduledThreadPoolExecutor.java:98)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:204)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
ok maybe my bad. I put whole file to include:
好吧，也许我不好。我把整个文件包括在内：
<from uri="file://{{fdr.folder.working.url}}&include=20120523.173227.CustomerMaster05092012.QWERTY.xml"/>
Whole file is OK. Let's try put * in the middle of file name
整个文件没问题。让我们试着把 * 放在文件名的中间
<from uri="file://{{fdr.folder.working.url}}&include=20120523.*.xml"/>
and again it is OK. Let's put only one digit in file name
再一次没问题。让我们在文件名中只输入一位
<from uri="file://{{fdr.folder.working.url}}&include=2*.xml"/>
noup, camel didn't find such files I tried escaped asterisk but it did't help.
noup，camel 没有找到这样的文件，我尝试转义星号，但没有帮助。
<from uri="file://{{fdr.folder.working.url}}&include=\*.xml"/>
and
<from uri="file://{{fdr.folder.working.url}}&include=\*.xml"/>
File was just ignored. so question 1: how to use asterisk?
文件只是被忽略了。所以问题1：如何使用星号？
and question 2: how to use multimple file extensions, like include=.xml;.zip
和问题 2：如何使用多个文件扩展名，例如 include= .xml; 。压缩
thks
谢谢
回答by Dmitrii Borovoi
damn, good thinking comes after, using brute force I found out correct value for include:
该死的，好的想法随之而来，使用蛮力我发现正确的价值包括：
.*.xml|.*.zip
回答by Simon
(?i).*.xml|.*.zip
If you want case insensitive file extension matching.
如果您想要不区分大小写的文件扩展名匹配。
回答by Adam Boczek
You have to properly escape the backslash in string and use end of string sign '$': include=.*\\.xml$
您必须正确转义字符串中的反斜杠并使用字符串结尾符号“$”：include=.*\\.xml$
