GWT - 2.1 RegEx类来解析自由文本 [英] GWT - 2.1 RegEx class to parse freetext

问题描述

我正在努力处理 com.google.gwt.regexp.shared.RegExp 类，并且只想解析字符串中的电话号码并获得所有出现的一个数字，但似乎只能得到第一次出现..我知道在Java（它的工作原理）和GWT之间的正则表达式存在细微的差异。

 字符串freeText =Theo Powell< 5643321309>，Robert Roberts< 9653768972>，Betty Wilson< 6268281885>，Brandon Anderson< 703203115> ;; 
 MatchResult matchResult = RegExp.compile（[\ +]？[0-9。 - ] {8，}）.exe（freeText）; 
 int groupCount = matchResult.getGroupCount（）; // result = 1 
 String s = matchResult.getGroup（0）; //结果= 5643321309 
  

预先致谢。

Ian ..

解决方案

您必须循环，再次应用模式，直到它不返回任何内容。为此，您首先必须使用全局标志：

ArrayList< String> matches = new ArrayList< String>（）;
RegExp pattern = RegExp.compile（[\ +]？[0-9。 - ] {8，}，g）;
for（MatchResult result = pattern.exec（freeText）; result！= null; result = pattern.exec（freeText））{
matches.add（result.getGroup（0））;

$ / code>

如果你认为这有点魔术或kludgy ）我建议阅读有关JavaScript RegExp 对象的文档，因为GWT中的 RegExp 类是这是一个直接的映射： https://developer.mozilla.org/en / JavaScript / Reference / Global_Objects / RegExp / exec （JS中的示例代码非常类似于上面的代码）。

I'm struggling with the com.google.gwt.regexp.shared.RegExpclass and simply want to parse the phone numbers from a string and get ALL occurrences of a number but only seems to be able to get the 1st occurrences.. I know there is subtle difference in the regex between java (where it works) and GWT.

String freeText = "Theo Powell<5643321309>, Robert Roberts<9653768972>, Betty Wilson<6268281885>, Brandon Anderson<703203115>";
MatchResult matchResult = RegExp.compile("[\+]?[0-9." "-]{8,}").exec(freeText);
int groupCount = matchResult.getGroupCount(); // result = 1
String s = matchResult.getGroup(0); //result = 5643321309

Thanks in advance.

Ian..

解决方案

You'll have to loop, applying the pattern again until it returns nothing. For that, you first have to use the "global" flag:

ArrayList<String> matches = new ArrayList<String>();
RegExp pattern = RegExp.compile("[\+]?[0-9. -]{8,}", "g");
for (MatchResult result = pattern.exec(freeText); result != null; result = pattern.exec(freeText)) {
   matches.add(result.getGroup(0));
}

If you think it's a bit "magic" or "kludgy" (which it kind of is), I'd suggest reading docs about the JavaScript RegExp object, as the RegExp class in GWT is a direct mapping of this: https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/RegExp/exec (with sample code in JS very similar to the one above).

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