San*_*nty 5 java regex string replace
我需要将“OR”一词替换为“||” 在给定的字符串中。仅当它在输入字符串中本身是一个完整的单词时才应替换。此外,如果它出现在引号内,则不应替换它。例如,如果输入字符串是
application.path="EXCEL.exe" 或 application.path="EXCELSIOR.exe" 或 application.path="XYZ 或 ABC.exe"
输出应该是
application.path="EXCEL.exe" || application.path="EXCELSIOR.exe" || application.path="XYZ 或 ABC.exe"
请注意,EXCELSIOR.exe 和“XYZ OR ABC.exe”中的 OR 不会被替换。
我使用的Java代码如下:
String inputStr = "(quote.AGE was 24 AND (application.path = \"**\\acad.exe\" OR application.path = \"**\\dxfdwg.exe\" OR application.path = \"**\\EXCELSIOR.EXE\" OR application.path = \"**\\iges.exe\" OR application.path = \"**\\notepad.exe\" OR application.path = \"**\\run_journal.exe\" OR application.path = \"**\\AcroRd32.exe\" OR application.path = \"**\\dllhost.exe\" OR application.path = \"**\\powerpnt.exe\" OR application.path = \"**\\Edge.exe\" OR application.path = \"**\\step203ug.exe\" OR application.path = \"**\\step214ug.exe\" OR application.path = \"**\\VisView.exe\" OR application.path = \"**\\Teamcenter.exe\" OR application.path = \"**\\ug_convert_part.exe\" OR application.path = \"**\\ugraf.exe\" OR application.path = \"**\\ugtopv.exe\" OR application.path = \"**\\wmplayer.exe\" OR application.path = \"**\\winword.exe\" OR application.path = \"**\\wordpad.exe\" OR application.path = \"**\\vlc.exe\" OR application.path = \"**\\dwgviewr.exe\" OR application.name = \"RMS\" OR application.path = \"**\\acrobat.exe\" OR application.path = \"**\\Alias.exe\" OR application.path = \"**\\awtessd.exe\" OR application.path = \"**\\proe.exe\" OR application.path = \"**\\STPViewer.exe\" OR application.path = \"**\\gom_inspect.exe\" OR application.path = \"**\\gom_cad_server2.exe\" OR application.path = \"**\\sldworks.exe\" OR application.path = \"**\\sldworks_fs.exe\" OR application.path = \"**\\sldProcMon.exe\" OR application.path = \"**\\AdapplicationMgr.exe\" OR application.path = \"**\\AdapplicationMgrSvc.exe\" OR application.path = \"**\\SE3Dtrans.exe\" OR application.path = \"**\\stamp.exe\" OR application.path = \"**\\psolid.exe\" OR application.path = \"**\\mpid.exe\" OR application.path = \"**\\mpirun.exe\" OR application.path = \"**\\FS.exe\" OR application.path = \"**\\xtop.exe\" OR application.path = \"**\\pro_comm_msg.exe\" OR application.path = \"**\\nmsd.exe\" OR application.path = \"**\\creoagent.exe\" OR application.path = \"**\\parametric.exe\" OR application.path = \"**\\PDFEditor.exe\" OR application.path = \"**\\CNEXT.exe\" OR application.path = \"**\\drafter.exe\" OR application.path = \"**\\convert.exe\" OR application.path = \"**\\ActCut3D.exe\" OR application.path = \"**\\ppcbasic.exe\" OR application.path = \"**\\deltamesh_stamping.exe\" OR application.path = \"Xasfsf\" OR application.path = \"sfdsdf\"))";
String replacedStr = inputStr.replaceAll("(?m)\\bOR\\b(?=(?:\"[^\"]*\"|[^\"])*$)", "||");
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这对于较短的字符串来说效果很好,但是一旦长度超过 2000 个字符,就会抛出以下错误:
线程“main”中的异常 java.lang.StackOverflowError 在 java.util.regex.Pattern$BmpCharProperty.match(Pattern.java:3796) 在 java.util.regex.Pattern$Branch.match(Pattern.java:4604) java.util.regex.Pattern$GroupHead.match(Pattern.java:4658) 在 java.util.regex.Pattern$Loop.match(Pattern.java:4785) 在 java.util.regex.Pattern$GroupTail.match( Pattern.java:4717) 在 java.util.regex.Pattern$BranchConn.match(Pattern.java:4568) 在 java.util.regex.Pattern$CharProperty.match(Pattern.java:3777) 在 java.util.regex .Pattern$Branch.match(Pattern.java:4604)
我在其他一些线程(thread1、thread2)中读到,Java 不能很好地处理长字符串的正则表达式。有人可以建议我如何改进我的正则表达式以避免 StackOverflowError 吗?
有人可以建议我如何改进我的正则表达式以避免 StackOverflowError 吗?
是的,我可以给你两个解决方案,你只需要从另一个角度看你的问题。
这是对您的问题的快速分析和快速解决方案,您可以使用此正则表达式(.*?\"\s+)\bOR\b(\s+application.*?):
String inputStr = //that long String
String regex = "(.*?\"\\s+)\\bOR\\b(\\s+application.*?)";
String replacedStr = inputStr.replaceAll(regex, "$1||$2");
System.out.println(replacedStr);
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我注意到您想要替换的 OR 存在于"ansspace OR之后application,我的正则表达式将匹配该 OR 并替换它。
对于短示例的输出,它将为长示例提供相同的结果:
application.path="EXCEL.exe" || application.path="EXCELSIOR.exe" || application.path="XYZ OR ABC.exe"
^^ ^^ ^^ ^^
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如果您使用的是 Java 9+ application.path=(\"(.*?)\"),您可以使用此正则表达式来匹配所有内容application.path="something here",例如,收集结果||
String regex = "application.path=(\"(.*?)\")";
String text = Pattern.compile(regex)
.matcher(inputStr).results().map(MatchResult::group)
.collect(Collectors.joining(" || "));
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