Question

我正在编写使用Regex验证URL的程序。但是当我针对这个URL测试它时（http://www.xml.com/pub/a/2003/09/17/stax.html#id=_hbc）它失败了。任何人都可以告诉我为什么它无法匹配该URL？这是代码：

import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class IPURLValidator {
    private Pattern patternHost;
    private Matcher matcher;
    private static final String hostName = "^((https?)://)([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\\-]*[a-zA-Z0-9]\\.)*([0-9]*\\_[0-9]*\\_" +
        "[a-zA-Z0-9\\_]*)*([A-Za-z]|[A-Za-z][A-Za-z0-9\\-]*[A-Za-z0-9]){2}" +
        "([0-9]*)?(\\/[\\+~%\\/\\.\\w\\-]*)?\\??([\\-\\+=&;%@\\/%\\.\\w]*)" +
        "#?([\\-\\+=&;%@\\/%\\.\\w]*)$";
    public IPURLValidator() {
        patternHost = Pattern.compile(hostName, Pattern.CASE_INSENSITIVE);
    }
    public boolean validateHost(String host) {
        matcher = patternHost.matcher(host);
        if (matcher.find()) {
            String HostName = matcher.group(0);
            System.out.println(HostName);
        }
        return matcher.matches();
    }
    public static void main(String[] args) {
        if (ip.validateHost("http://www.xml.com/pub/a/2003/09/17/stax.html#id=abc")) {
            System.out.println("its valide host");
            else {
                System.out.println("its not valide URL/IP address");
            }
        }
    }

Answer 1

我想你想这样做：

   public boolean validateHost(String host){
       matcher = patternHost.matcher(host);
       if (matcher.matches()) {
           String HostName = matcher.group(0);
           System.out.println(HostName);
           return true;
       }
       return false;
   }

正则表达式与锚点部分中的等号不匹配特定URL

1 个答案: