英文:
Replace .(dot) inside number Java between two elements
问题
我有这个字符串：
String str = "<p>23.5</p>";
我想仅在<p>元素内部将点替换为逗号。我需要的输出是：
<p>23,5</p>
我无法弄清楚，我有以下代码：
str = str.replaceAll(""(?<=<p>)\\.(?=</p>)"", "","");
但它不起作用。我需要仅在特定标签（这是一个字符串中的 XML）的元素中替换点，这里是<p>。
谢谢
英文:
I have this String:
String str = "<p>23.5</p>";
And i want to replace the dot for comma only inside <p> elements. The output i need is:
<p>23,5</p>
I cant figure it out, i have this:
str = str.replaceAll("(?<=<p>)\\.(?=</p>)", ",");
But it doesnt work. I need to replace dot only in elements with particular tag (is an xml in a String), in this case <p>.
Thank you
答案1
得分: 1
你可以使用捕获组+转义斜杠：
str = str.replaceAll("(?<=<p>)(\\d*)\\.(\\d+)(?=<\\/p>)", "$1,$2");
如果你想要替换所有数字中的点号，同样可以使用：
str = str.replaceAll("(\\d*)\\.(\\d+)", "$1,$2");
英文:
You may use capturing groups + escape the /:
str = str.replaceAll("(?<=<p>)(\\d*)\\.(\\d+)(?=<\\/p>)", "$1,$2");
If you want to replace dot in all numbers, you may just as well use
str = str.replaceAll("(\\d*)\\.(\\d+)", "$1,$2");
答案2
得分: 1
以下是您要求的翻译内容：
以下正则表达式将匹配位于数字字符之间的点字符：
(?<=\d)\.(?=\d)
正则表达式解释：
\d- 匹配任何 0-9 之间的数字(?<=\d)\.- 正向后查找，匹配在点号之前有一个数字的任何点号字符\.(?=\d)- 正向前查找，匹配在点号之后有一个数字的任何点号字符
演示：
https://regex101.com/r/WMEjPl/1
Java 代码示例：
public static void main(String args[]) {
String regex = "(?<=\\d)\\.(?=\\d)";
String str = "<p>23.5</p>";
String str2 = "Mr. John <p>23.5</p> Hello";
String str3 = "Mr. John <p>23.5</p> Hello 12.2324";
System.out.println(str.replaceAll(regex, ",")); // <p>23,5</p>
System.out.println(str2.replaceAll(regex, ",")); // Mr. John <p>23,5</p> Hello
System.out.println(str3.replaceAll(regex, ",")); // Mr. John <p>23,5</p> Hello 12,2324
}
英文:
Following regex will match the dot character that is between numerical characters
(?<=\d)\.(?=\d)
Regex Explanation:
\d- match any digit between 0-9(?<=\d)\.- positive look-behind to match any.character that has a digit just before it\.(?=\d)- positive look-ahead to match any.character that has a digit just after it
Demo:
https://regex101.com/r/WMEjPl/1
Java Code Example:
public static void main(String args[]) {
String regex = "(?<=\\d)\\.(?=\\d)";
String str = "<p>23.5</p>";
String str2 = "Mr. John <p>23.5</p> Hello";
String str3 = "Mr. John <p>23.5</p> Hello 12.2324";
System.out.println(str.replaceAll(regex, ",")); // <p>23,5</p>
System.out.println(str2.replaceAll(regex, ",")); // Mr. John <p>23,5</p> Hello
System.out.println(str3.replaceAll(regex, ",")); // Mr. John <p>23,5</p> Hello 12,2324
}
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