[英]How to replace just numbers in string using regex in Java?
我有这样的字符串
"{"name:John","Age:15","width:500","height:300"},{"name:Mike","Age:25","width:600","height:400"}";
我怎样才能像宽度和高度之后那样替换数字
"{"name:John","Age:15","width:100","height:100"},{"name:Mike","Age:25","width:100","height:100"}";
谢谢
使用此正则表达式进行搜索:
(width|height):\d+
并替换为:
$1:100
Java:
str = str.replaceAll("(width|height):\\d+", "$1:100");
在Java中,我们可以在后面使用替代列表( 请参阅Java通过允许有限重复来使事情更进一步 ),并且它们的长度不必相同:
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"));
演示程序的输出:
"{"name:John","Age:15","width:100","height:100"},{"name:Mike","Age:25","width:100","height:100"}";
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