为WebClient请求设置User-Agent标头

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.util.List;
import java.util.Map;

public class UserAgentExample {
    public static void main(String[] args) throws Exception {
        String url = "https://www.example.com";
        String userAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36";

        URLConnection connection = new URL(url).openConnection();
        connection.setRequestProperty("User-Agent", userAgent);

        BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
        String line;
        while ((line = reader.readLine()) != null) {
            System.out.println(line);
        }
        reader.close();
    }
}