[英]Java multi-line regular expression debugging
在Java中,以下正则表达式
To: a@b\.com.*Subject: Please verify your email address
在某种程度上找不到此文本中的匹配项:
Dez 21, 2012 10:29:58 AM com.google.appengine.api.datastore.dev.LocalDatastoreService init
INFO: Local Datastore initialized:
Type: High Replication
Storage: In-memory
Dez 21, 2012 10:29:58 AM com.google.appengine.api.mail.dev.LocalMailService log
INFO: MailService.send
Dez 21, 2012 10:29:58 AM com.google.appengine.api.mail.dev.LocalMailService log
INFO: From:
Dez 21, 2012 10:29:58 AM com.google.appengine.api.mail.dev.LocalMailService log
INFO: To: a@b.com
Dez 21, 2012 10:29:58 AM com.google.appengine.api.mail.dev.LocalMailService log
INFO: Subject: Please verify your email address
Dez 21, 2012 10:29:58 AM com.google.appengine.api.mail.dev.LocalMailService log
INFO: Body:
Dez 21, 2012 10:29:58 AM com.google.appengine.api.mail.dev.LocalMailService log
INFO: Content-type: text/plain
Dez 21, 2012 10:29:58 AM com.google.appengine.api.mail.dev.LocalMailService log
INFO: Data length: 4
我的Java代码如下所示:
Matcher matcher = Pattern.compile(regex, Pattern.MULTILINE).matcher(input);
if (matcher.find()) {
...
}
这有点奇怪,因为当我使用此工具在线测试该模式时,该模式似乎可以正常工作: http : //regexpal.com
因此,Java对模式的解释必须有所不同。 有什么方法可以获取Matcher
错误消息吗?
更新它应该找到:
To: a@b.com
Dez 21, 2012 10:29:58 AM com.google.appengine.api.mail.dev.LocalMailService log
INFO: Subject: Please verify your email address
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