Base64工具类合集Base64Utils

最新推荐文章于 2023-12-07 02:20:24 发布

原创最新推荐文章于 2023-12-07 02:20:24 发布 · 963 阅读

1 ·

CC 4.0 BY-SA版权

文章标签：

#java #base64

java 同时被 2 个专栏收录

18 篇文章

订阅专栏

加密

3 篇文章

订阅专栏

这个Java类库提供了一套简洁的Base64编码和解码实用方法，适配了Java 8的`java.util.Base64`。主要功能包括标准Base64编码和解码，以及URL和文件名安全的Base64编码和解码。此外，还提供了将编码后的字节数组转换为字符串和从UTF-8字符串解码的方法。

直接上代码！

import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.Base64;

/**
 * A simple utility class for Base64 encoding and decoding.
 *
 * <p>Adapts to Java 8's {@link java.util.Base64} in a convenience fashion.
 *
 * @author Juergen Hoeller
 * @author Gary Russell
 * @since 4.1
 * @see java.util.Base64
 */
public abstract class Base64Utils {

	private static final Charset DEFAULT_CHARSET = StandardCharsets.UTF_8;


	/**
	 * Base64-encode the given byte array.
	 * @param src the original byte array
	 * @return the encoded byte array
	 */
	public static byte[] encode(byte[] src) {
		if (src.length == 0) {
			return src;
		}
		return Base64.getEncoder().encode(src);
	}

	/**
	 * Base64-decode the given byte array.
	 * @param src the encoded byte array
	 * @return the original byte array
	 */
	public static byte[] decode(byte[] src) {
		if (src.length == 0) {
			return src;
		}
		return Base64.getDecoder().decode(src);
	}

	/**
	 * Base64-encode the given byte array using the RFC 4648
	 * "URL and Filename Safe Alphabet".
	 * @param src the original byte array
	 * @return the encoded byte array
	 * @since 4.2.4
	 */
	public static byte[] encodeUrlSafe(byte[] src) {
		if (src.length == 0) {
			return src;
		}
		return Base64.getUrlEncoder().encode(src);
	}

	/**
	 * Base64-decode the given byte array using the RFC 4648
	 * "URL and Filename Safe Alphabet".
	 * @param src the encoded byte array
	 * @return the original byte array
	 * @since 4.2.4
	 */
	public static byte[] decodeUrlSafe(byte[] src) {
		if (src.length == 0) {
			return src;
		}
		return Base64.getUrlDecoder().decode(src);
	}

	/**
	 * Base64-encode the given byte array to a String.
	 * @param src the original byte array
	 * @return the encoded byte array as a UTF-8 String
	 */
	public static String encodeToString(byte[] src) {
		if (src.length == 0) {
			return "";
		}
		return new String(encode(src), DEFAULT_CHARSET);
	}

	/**
	 * Base64-decode the given byte array from an UTF-8 String.
	 * @param src the encoded UTF-8 String
	 * @return the original byte array
	 */
	public static byte[] decodeFromString(String src) {
		if (src.isEmpty()) {
			return new byte[0];
		}
		return decode(src.getBytes(DEFAULT_CHARSET));
	}

	/**
	 * Base64-encode the given byte array to a String using the RFC 4648
	 * "URL and Filename Safe Alphabet".
	 * @param src the original byte array
	 * @return the encoded byte array as a UTF-8 String
	 */
	public static String encodeToUrlSafeString(byte[] src) {
		return new String(encodeUrlSafe(src), DEFAULT_CHARSET);
	}

	/**
	 * Base64-decode the given byte array from an UTF-8 String using the RFC 4648
	 * "URL and Filename Safe Alphabet".
	 * @param src the encoded UTF-8 String
	 * @return the original byte array
	 */
	public static byte[] decodeFromUrlSafeString(String src) {
		return decodeUrlSafe(src.getBytes(DEFAULT_CHARSET));
	}

}