Java8 Base64

1 Java8 Base64

Base64工具类提供了一套静态方法获取下面三种BASE64编解码器：

基本：输出被映射到一组字符A-Za-z0-9+/，编码不添加任何行标，输出的解码仅支持A-Za-z0-9+/；
URL：输出映射到一组字符A-Za-z0-9+_，输出是URL和文件；
MIME：输出隐射到MIME友好格式。输出每行不超过76字符，并且使用’\r’并跟随’\n’作为分割，编码输出最后没有行分割；

2 案例

// Encode using basic encoder
        String base64encodedString = Base64.getEncoder().encodeToString("尘埃安然".getBytes("utf-8"));
        System.out.println("Base64编码后(Base):" + base64encodedString);
        // Decode using basic encoder
        byte[] base64decodedBytes = Base64.getDecoder().decode(base64encodedString);
        System.out.println("Base64解码后(Base): " + new String(base64decodedBytes, "utf-8"));

        // Encode using URL encoder
        String base64UrlEncodedString = Base64.getUrlEncoder().encodeToString("仓央嘉措".getBytes("utf-8"));
        System.out.println("Base64 编码后(URL) :" + base64UrlEncodedString);
        // Decode using URL encoder
        String base64UrlDecodedString = new String(Base64.getUrlDecoder().decode(base64UrlEncodedString));
        System.out.println("Base64 解码后(URL) :" + base64UrlDecodedString);

        // Encode using URL encoder
        StringBuilder stringBuilder = new StringBuilder();
        for (int i = 0; i < 4; ++i) {
            stringBuilder.append(UUID.randomUUID().toString());
        }
        byte[] mimeBytes = stringBuilder.toString().getBytes("utf-8");
        String mimeEncodedString = Base64.getMimeEncoder().encodeToString(mimeBytes);
        System.out.println("Base64 编码后 (MIME) :" + mimeEncodedString);
        // Decode using URL encoder
        String mimeDncodedString = new String(Base64.getMimeDecoder().decode(mimeEncodedString));
        System.out.println("Base64 解码后 (MIME) :" + mimeDncodedString);

执行结果：

Base64编码后(Base):5bCY5Z+D5a6J54S2
Base64解码后(Base): 尘埃安然
Base64 编码后(URL) :5LuT5aSu5ZiJ5o6q
Base64 解码后(URL) :仓央嘉措
Base64 编码后 (MIME) :ZTdjNGYxZTctZGNmZi00ZTY1LThlN2ItZDNlZTc2MzVmMjNhZDA1MWIzNGItMzUwZS00NmExLTli
NGMtN2IwYzEyYTE0OTBkMDBkZDk3Y2EtZDZkYi00NGJiLTkyNTEtODI4ODcwMTY4ZWU0MjcxMjk0
NTQtOTBmOC00MjE4LWI2OGUtODk3MDY2YjJmZDAx
Base64 解码后 (MIME) :e7c4f1e7-dcff-4e65-8e7b-d3ee7635f23ad051b34b-350e-46a1-9b4c-7b0c12a1490d00dd97ca-d6db-44bb-9251-828870168ee427129454-90f8-4218-b68e-897066b2fd01

涉及代码：–>GitHub

参考文献：
[1] https://www.tutorialspoint.com/java8/java8_base64.htm
[2] https://dzone.com/articles/base64-encoding-java-8
[3] https://howtodoinjava.com/java8/base64-encoding-and-decoding-example-in-java-8/
[4] https://www.javaworld.com/article/3240006/java-language/base64-encoding-and-decoding-in-java-8.html