Standard URL Normalization - Java

import java.net.URL;

public class UrlNormalizer {
    public static String normalize(String url) throws MalformedURLException {
        URL normalizedUrl = new URL(url);
        String protocol = normalizedUrl.getProtocol().toLowerCase();
        String host = normalizedUrl.getHost().toLowerCase();
        String path = normalizedUrl.getPath();
        String query = normalizedUrl.getQuery();

        // 进行归一化处理

        return new URL(protocol, host, path + "?" + query).toString();
    }
}

import org.apache.commons.httpclient.HttpClient;
import org.apache.commons.httpclient.methods.GetMethod;

public class UrlNormalizer {
    public static String normalize(String url) throws Exception {
        HttpClient httpClient = new HttpClient();
        GetMethod getMethod = new GetMethod(url);
        int statusCode = httpClient.executeMethod(getMethod);

        if (statusCode != HttpStatus.SC_OK) {
            throw new RuntimeException("Failed to normalize URL: " + url);
        }

        return getMethod.getURI().toString();
    }
}