正则表达式给长输入字符串StackOverflowError

Question

我想在我的代码中使用正则表达式寻找HTML标记<(.|\n)+?>。

现在我遇到了一个字符串，这个正则表达式给了我一个StackOverflowError。

它第一次通过组函数在字符串中找到粗体部分，但下一次给出下面提到的异常。

我使用下面的字符串：

 
"In SCCM 2012 there is a completely revised version of the Mobile Device 
Management part. Sure, this was already there in SCCM 2007, but hey, would YOU 
want to "manage" ancient Windows CE or Windows Mobile 5.0 devices? I didn't 
think so too. Also, in the SCCM 2007 era, Bring Your Own Device (BYOD) wasn't 
as hot as it is today, with everyone wanting to bring in and use their own 
Tablets, Smarphones and laptops. Now with SCCM 2012, there is proper support 
for BYOD. Yeah! For a nice overview of this, see this video of Principal 
Program manager Jeffrey Sutherland, talking about Mobile Device Management in 
SCCM 2012. Light and Depth Management We can define two types of device 
management in SCCM 2012: -> Light Management **<- Working through Exchange 
ActiveSync, we leverage on the existing Exchange Device Policies, to do light 
management of the device (remote wipe, lockdown etc) Why do we want this? It's 
already in Exchange right? Well, the Exchange admins might not be very 
concerned with specific end-users devices as they are with handling the 
mailflow, so this task may better fit with the desktop/enduser/device 
management team in your organization. They are the ones working with SCCM 2012, 
and they are the ones most interested in gathering information about, and 
managing the devices. Also, SCCM provides some very nice Reporting on these 
devices.** ->In-Depth Management <- The other type is the In-Depth Management 
of Mobile Devices This does not work through EAS, but through two new SCCM 
Roles that have been introduced in SCCM 2012; the Enrollment Point and the 
Enrollment Proxy point. In-depth management can be done in two ways; - Enroll 
the mobile devices into SCCM by installing the Mobile Device Client on them. 
Only on supported mobile OS's.(Currently WinMobile 6.1, 6.5 and Nokia Symbian 
Belle) .Offers most features. - Enroll the mobile devices into SCCM by 
installing the Legacy Mobile Device Client on it. Only on supported mobile 
OS's, which currently are ancient WinCE 5, 6 and 7, and WinMo 6.0. Less 
features, but still way more options than with EAS. For a good comparison of 
all features on all three scenarios(EAS, Mobile Device Client on device, and 
Legacy Mobile device client), see this page on Technet. Note that both in-depth 
solutions require a PKI Infrastructure, because of the Certificates that are 
used on the devices! So, more on the In-Depth part later, let's first get the 
EAS connected. (Yes, you can also choose hybrid solutions, ie. managing with 
both EAS and through the Enrollment) Configuration of Mobile Device Management 
through Exchange So, how do we set this up? First the prereqs: an Exchange 2010 
SP1 server (or Exchange Online(office365),and a working SCCM 2012 server (duh) 
and a network connection between them. Then we have to establish a connection 
between the SCCM server and the Exchange (CAS) server. We click Add exchange 
server and get the wizard: Specifiy the name of the exchange CAS server... Hey, 
look at this screen. A precise listing of the exchange permissions that the 
connector account requires. I'd say this calls for a new RBAC  Role in 
Exchange! So, lets first create a serviceaccount for this connection and assign 
the proper exchange permissions to it. Now i am going to be assigning Read-Only 
rights to this service account, 'cause i just want to get data from EAS about 
the devices, and not do any remote wiping. Which is by the way also how 
Microsoft IT did this (read here) Then continue through the wizard: I just set 
this to Weekly Full discovery, and Delta discovery twice a day. So, after this 
wizard, the connection has been established with the CAS server. As you can 
see, the path /powershell has been added to the targetpath of the Exchange 
server. Which makes sense, because all it really does is fire up PowerShell 
cmdlets against the CAS, to get information from it. So, do we see any devices 
now? First lets kick off a discovery cycle: And behold: Well that device has my 
name written all over it (tee-hee) So, what can we do with it then? Well, not 
an awfull lot: Wipe, Block, and.. hmm. well. Lets have a look at those Reports 
then: Wow. That's a lot of Reports Built-in. Very cool! So far for this then. 
Time to get really busy, and fire up an old Windows Mobile 6.5 phone, and start 
doing some real managing. In the Next post that is." 

得到唯一的例外是

Exception in thread "main" java.lang.StackOverflowError 
    at java.util.regex.Pattern$LazyLoop.match(Unknown Source) 
    at java.util.regex.Pattern$GroupTail.match(Unknown Source) 
    at java.util.regex.Pattern$BranchConn.match(Unknown Source) 
    at java.util.regex.Pattern$CharProperty.match(Unknown Source) 
    at java.util.regex.Pattern$Branch.match(Unknown Source) 
    at java.util.regex.Pattern$GroupHead.match(Unknown Source) 

Answer 1

您可以使用-Xss JVM标志（每个线程的堆栈大小），如果真的没有环路