Java 多次在两个字符串之间使用正则表达式

我有一根像

[{"id":"9","label":"P","price":"0","oldPrice":"0","products":["606","610","614","618","622","625","629"]},{"id":"8","label":"M","price":"0","oldPrice":"0","products":["607","611","615","619","626","630"]},{"id":"7","label":"G","price":"0","oldPrice":"0","products":["609","613","617","621","624","628","632"]},{"id":"36","label":"GG","price":"0","oldPrice":"0","products":["608","612","616","620","623","627","631"]},{"id":"152","label":"XGG","price":"0","oldPrice":"0","products":["3713","6577","6578","6579","6580","6581","6582"]}]

我需要的是标签值：p，M，G，GG，XGG。我试着把标签和逗号之间的所有东西都取出来，但都不起作用

标签。*

这就行了

或者如果您真的想将其解析为json

这样做

var arr = [];
var jso = [{"id":"9","label":"P","price":"0","oldPrice":"0","products":["606","610","614","618","622","625","629"]},{"id":"8","label":"M","price":"0","oldPrice":"0","products":["607","611","615","619","626","630"]},{"id":"7","label":"G","price":"0","oldPrice":"0","products":["609","613","617","621","624","628","632"]},{"id":"36","label":"GG","price":"0","oldPrice":"0","products":["608","612","616","620","623","627","631"]},{"id":"152","label":"XGG","price":"0","oldPrice":"0","products":["3713","6577","6578","6579","6580","6581","6582"]}];
console.log(jso.length);
for(var i=0;i<jso.length;i++){
    arr.push(jso[i].label);
}
console.log(arr);

---

regex演示：

此字符串为JSON格式，因此建议使用JSON解析器，而不是使用regex

阅读中的JSON格式

---

此链接提供了有关java中JSON的说明

您的正则表达式是贪婪的

把它改成lazy

标签。*

还可以使用条件正则表达式仅获取标签值

使用条件表达式的正则表达式

但是，您可能应该使用JSON解析器

此正则表达式将捕获组名称标签中的所有标签

.*?(?:label)":"(?<labels>[^"]+)+.*?

或者，根据您执行此操作的方式，只需搜索此匹配项

(?:label)":"(?<labels>[^"]+)

您可以看到它在这里工作：

以及由regex101生成的结果JAVA：

String re = "(?:label)\\":\\"(?<labels>[^\\"]+)";
String str = "[{\"id\":\"9\",\"label\":\"P\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"606\",\"610\",\"614\",\"618\",\"622\",\"625\",\"629\"]},{\"id\":\"8\",\"label\":\"M\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"607\",\"611\",\"615\",\"619\",\"626\",\"630\"]},{\"id\":\"7\",\"label\":\"G\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"609\",\"613\",\"617\",\"621\",\"624\",\"628\",\"632\"]},{\"id\":\"36\",\"label\":\"GG\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"608\",\"612\",\"616\",\"620\",\"623\",\"627\",\"631\"]},{\"id\":\"152\",\"label\":\"XGG\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"3713\",\"6577\",\"6578\",\"6579\",\"6580\",\"6581\",\"6582\"]}]
";

Pattern p = Pattern.compile(re, Pattern.CASE_INSENSITIVE);
Matcher m = p.matcher(str);

---

谢谢，我知道它是JSON格式的，但我不能使用解析器，它是来自web爬虫的字符串对象，我无法更改。您可以解析字符串中的JSON内容

String re = "(?:label)\\":\\"(?<labels>[^\\"]+)";
String str = "[{\"id\":\"9\",\"label\":\"P\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"606\",\"610\",\"614\",\"618\",\"622\",\"625\",\"629\"]},{\"id\":\"8\",\"label\":\"M\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"607\",\"611\",\"615\",\"619\",\"626\",\"630\"]},{\"id\":\"7\",\"label\":\"G\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"609\",\"613\",\"617\",\"621\",\"624\",\"628\",\"632\"]},{\"id\":\"36\",\"label\":\"GG\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"608\",\"612\",\"616\",\"620\",\"623\",\"627\",\"631\"]},{\"id\":\"152\",\"label\":\"XGG\",\"price\":\"0\",\"oldPrice\":\"0\",\"products\":[\"3713\",\"6577\",\"6578\",\"6579\",\"6580\",\"6581\",\"6582\"]}]
";

Pattern p = Pattern.compile(re, Pattern.CASE_INSENSITIVE);
Matcher m = p.matcher(str);