如何在Java中使用正則表達式替換字符串中的數字？

Question

我有這樣的字符串

"{"name:John","Age:15","width:500","height:300"},{"name:Mike","Age:25","width:600","height:400"}";

我怎樣才能像寬度和高度之后那樣替換數字

"{"name:John","Age:15","width:100","height:100"},{"name:Mike","Age:25","width:100","height:100"}";

謝謝

Answer 1

使用此正則表達式進行搜索：

(width|height):\d+

並替換為：

$1:100

正則演示

Java：

str = str.replaceAll("(width|height):\\d+", "$1:100");

Answer 2

在Java中，我們可以在后面使用替代列表（ 請參閱Java通過允許有限重復來使事情更進一步 ），並且它們的長度不必相同：

String str = "\"{\"name:John\",\"Age:15\",\"width:500\",\"height:300\"},{\"name:Mike\",\"Age:25\",\"width:600\",\"height:400\"}\";";
System.out.println(str.replaceAll("(?i)(?<=width:|height:)\\d+", "100"));

演示程序的輸出：

"{"name:John","Age:15","width:100","height:100"},{"name:Mike","Age:25","width:100","height:100"}";