QUESTION:

TinyURL is a URL shortening service where you enter a URL such as https://leetcode.com/problems/design-tinyurl and it returns a short URL such as http://tinyurl.com/4e9iAk.

Design the encode and decode methods for the TinyURL service. There is no restriction on how your encode/decode algorithm should work. You just need to ensure that a URL can be encoded to a tiny URL and the tiny URL can be decoded to the original URL.

EXPLANATION:

其实我就是直接用base64进行编码的。。。

SOLUTION:

import java.util.*;
public class Codec {

    // Encodes a URL to a shortened URL.
    public String encode(String longUrl) {
        return new String(Base64.getEncoder().encode(longUrl.getBytes()));
    }

    // Decodes a shortened URL to its original URL.
    public String decode(String shortUrl) {
        return new String(Base64.getDecoder().decode(shortUrl.getBytes()));
    }
}