Flex RegExp到Java RegExp [英] Flex RegExp to Java RegExp

问题描述

最近我在寻找帮助来提取使用RegExp在flex中的一些URL的模式，很少有人慷慨地帮助我完成。 查看此我需要在java层再次做，我试图在java中应用相同的regExp模式，但它给了我一个错误。

  var s：String =www.something.com@param1={{$User Name ^}}，{{^，e，^}}，param2 = {{^ user id ^}}; 
 var userPattern：RegExp = /（？< = param1 =）（{{\ ^）（[A-Za-z0-9\ ^}} {{，]）*（}）/; 
 var userIdPattern：RegExp = /（？< = param2 =）（{{\ ^）（[A-Za-z0-9\ ^}} {{，]）*（}）/; 
 s = s.replace（userPattern，'username'）; 
 s = s.replace（userIdPattern，'user_id'）; 
  

这给了www.something.com @ param1 = username，param2 = user_id。

有人可以帮我在java层做到这一点，相对正则表达式就足够了。

这是我试过的java，

  String url =http://www.google.com/@param1={{Case Name ^} }，param2 = {{^ Case Id ^}}; 
 String urlPattern =/（{{\\ ^）（[A-Za-z0-9_\\ ^}} {{，]）*（}）/; 
模式paramPattern = Pattern.compile（urlPattern）; 
 Matcher匹配器= paramPattern.matcher（url）; 
 System.out.println（Matches  - + matcher.matches（））; 
 System.out.println（Find  - + matcher.find（））; 
  

给出这个错误

线程main中的异常java.util.regex.PatternSyntaxException：索引1附近的非法重复
/（{{\ ^）（[A-Za-z0-9_\ ^}} {$，$，$，$，$，$，$，$，$，$，$，$，$， 是Java正则表达式中的元字符，用于有限的重复，例如 a {1,2} 至少匹配1，最多2个a。因为你不用它来重复，你应该用 \\ 来转义每个 {。

Recently i was looking for help to extract some pattern of a URL using RegExp in flex, Few guys kindly helped me to get it done. See this I need to do it again in java layer, i tried to applied the same regExp pattern in java, but it gives me an error.

var s:String = "www.something.com@param1={{^User Name^}},{{^,e,^}},param2={{^user id^}}";
var userPattern:RegExp = /(?<=param1=)({{\^)([A-Za-z0-9\^}}{{, ])*(})/;
var userIdPattern:RegExp = /(?<=param2=)({{\^)([A-Za-z0-9\^}}{{, ])*(})/;
s = s.replace(userPattern,'username');
s = s.replace(userIdPattern,'user_id');

This gives the www.something.com@param1=username,param2=user_id.

Can somebody help me out to do this in java layer, relavent regular expression is enough.

This is what i tried in java,

String url = "http://www.google.com/@param1={{^Case Name^}},param2={{^Case Id^}}";
String urlPattern = "/({{\\^)([A-Za-z0-9_\\^}}{{, ])*(})/";
Pattern paramPattern = Pattern.compile(urlPattern);     
Matcher matcher = paramPattern.matcher(url);       
System.out.println("Matches - "+matcher.matches());
System.out.println("Find - "+matcher.find());

It gives this error

Exception in thread "main" java.util.regex.PatternSyntaxException: Illegal repetition near index 1 /({{\^)([A-Za-z0-9_\^}}{{, ])*(})/

解决方案

{ is a meta character in Java regexes, for bounded repetition, e.g. a{1,2} matches at least 1, at most 2 'a's. As you are not using it for repetition, you ought to escape each { with \\.

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