如何在 Java 中使用正则表达式拆分地图字符串

发布于 2024-10-10 03:38:28 字数 380 浏览 0 评论 0原文

在我工作的系统中，有一些我想更改但无法更改的遗留代码。此代码将值存储在类似于以下字符串的映射中：

userId: "929290"; name: "Donnie Darko"; obj : {field1: "field"; field2: "field2"} phone: "666-6666";

请注意，对象映射后面没有分号，但每个其他键/值对都有分号。有没有办法在Java中使用Regex并获取该映射的第一级，这样我就可以：

userId: "929290"
obj : {field1: "field"; field2: "field2"}

我只想要第一级，我不想单独解析field1和field2。

原文

In the system I work on there is some legacy code that I would love to change, but can't. This code is storing values in a map which looks like the following string:

userId: "929290"; name: "Donnie Darko"; obj : {field1: "field"; field2: "field2"} phone: "666-6666";

Notice that the object map isn't followed by a semicolon, but every other key/value pair is. Is there a way to use Regex in Java and get the first level of this map, so that I could have:

userId: "929290"
obj : {field1: "field"; field2: "field2"}

I only want the first level, I'm not looking to parse out field1 and field2 individually.

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千鲤 2024-10-17 03:38:28

不确定这里的用例，但这里有正则表达式可以帮助您找到它

 Pattern userIdPattern = Pattern.compile("^userId:\\s*\"(\\d+)\";.*$"); // will be the userId number
 Pattern objPattern = Pattern.compile(".*(obj\\s*:\\s*\{[^\}]+\}).*"); //will be the JSON object inside
 Matcher userIdMatcher = userIdPattern.matcher("userId: \"929290\"; name: \"Donnie Darko\"; obj : {field1: \"field\"; field2: \"field2\"} phone: \"666-6666\";");
 if(userIdMatcher.find()){
     System.out.println("userId : " + .group(1));
 }
 Matcher objPatternMatcher = objPattern.matcher("userId: \"929290\"; name: \"Donnie Darko\"; obj : {field1: \"field\"; field2: \"field2\"} phone: \"666-6666\";");
 if(objPatternMatcher.find()){
     System.out.println(objPatternMatcher.group(1));
 }

not sure of the use case here, but here are the regexes to help you find it

 Pattern userIdPattern = Pattern.compile("^userId:\\s*\"(\\d+)\";.*$"); // will be the userId number
 Pattern objPattern = Pattern.compile(".*(obj\\s*:\\s*\{[^\}]+\}).*"); //will be the JSON object inside
 Matcher userIdMatcher = userIdPattern.matcher("userId: \"929290\"; name: \"Donnie Darko\"; obj : {field1: \"field\"; field2: \"field2\"} phone: \"666-6666\";");
 if(userIdMatcher.find()){
     System.out.println("userId : " + .group(1));
 }
 Matcher objPatternMatcher = objPattern.matcher("userId: \"929290\"; name: \"Donnie Darko\"; obj : {field1: \"field\"; field2: \"field2\"} phone: \"666-6666\";");
 if(objPatternMatcher.find()){
     System.out.println(objPatternMatcher.group(1));
 }

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庆幸我还是我 2024-10-17 03:38:28

您是否考虑过使用ANTLR？它是一种比正则表达式更强大的语言识别器。这样，您就可以处理复合字段（例如 {field1: {field3:"field3"; field4="field4"}; field2: "field2"}）。学习曲线比不过学习正则表达式；但是，在我看来，学习 ANTLR 是值得的。

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