曾经用过的正则表达式
public static void main(String[] args) {
String aString="w14-rq22.3";
//只保留数字
aString = aString.replaceAll("[^(0-9)]","");
System.out.println(aString);
String bString="w14-rq22.3";
//保留数字,小数点
bString = bString.replaceAll("[^\\d.]", "");
System.out.println(bString);
String cString="w14-rq22.3";
//保留数字,小数点,负号
cString = cString.replaceAll("[^\\d.\\d-]", "");
System.out.println(cString);
}
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