Java 正则表达式捕获组

Question

我想从此字符串中分割宽度和高度

String imgStyle = "width: 300px; height: 295px;";
int width = 300; // i want to get this value
int height = 295; // i want to get this value

我尝试了很多正则表达式，但无法得到它们。

String imgStyle = "width: 300px; height: 295px;";

int imgHeight = 0;
int imgWidth = 0;

Pattern h = Pattern.compile("height:([0-9]*);");
Pattern w = Pattern.compile("width:([0-9]*);");

Matcher m1 = h.matcher(imgStyle);
Matcher m2 = w.matcher(imgStyle);

if (m1.find()) {
    imgHeight = Integer.parseInt(m1.group(2));
}

if (m2.find()) {
    imgWidth = Integer.parseInt(m2.group(2));
}

java.lang.IllegalStateException:到目前为止没有成功的匹配

Answer 1

尝试如下:

String imgStyle = "width: 300px; height: 295px;";
Pattern pattern = Pattern.compile("width:\\s+(\\d+)px;\\s+height:\\s+(\\d+)px;");
Matcher m = pattern.matcher(imgStyle);
if (m.find()) {
    System.out.println("width is " + m.group(1));
    System.out.println("height is " + m.group(2));
}