如何在Java字符串中搜索模式？
Java提供了 java.util.regex包，用于与正则表达式进行模式匹配。然后，您可以使用此软件包的类和方法在Java字符串中搜索模式。
示例
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegexMatches {
public static void main( String args[] ) {
String line = "This order was placed for QT3000! OK?";
String pattern = "(.*)(\\d+)(.*)";
Pattern r = Pattern.compile(pattern);
Matcher m = r.matcher(line);
if (m.find( )) {
System.out.println("Found value: " + m.group(0));
System.out.println("Found value: " + m.group(1));
System.out.println("Found value: " + m.group(2));
}else{
System.out.println("NO MATCH");
}
}
}输出结果
Found value: This order was placed for QT3000! OK? Found value: This order was placed for QT300 Found value: 0