如何在url中显示符号"&“和"=”？

var key = "value1&value2";
var encodedKey = encodeURIComponent(key);
var url = "https://example.com/?key=" + encodedKey;
console.log(url);

import java.net.URLEncoder;

public class Main {
    public static void main(String[] args) throws Exception {
        String key = "value1&value2";
        String encodedKey = URLEncoder.encode(key, "UTF-8");
        String url = "https://example.com/?key=" + encodedKey;
        System.out.println(url);
    }
}