Base 64 编码和解码示例代码

问题描述：

有谁知道如何使用 Base64 解码和编码 Base64 中的字符串.我正在使用以下代码，但它不起作用.

Does anyone know how to decode and encode a string in Base64 using the Base64. I am using the following code, but it's not working.

String source = "password"; 
byte[] byteArray = source.getBytes("UTF-16"); 
Base64 bs = new Base64(); 
//bs.encodeBytes(byteArray); 
System.out.println( bs.encodeBytes(byteArray)); 
//bs.decode(bs.encodeBytes(byteArray));
System.out.println(bs.decode(bs.encodeBytes(byteArray)));

答

第一:

选择一种编码.UTF-8 通常是一个不错的选择；坚持一种在双方都肯定有效的编码.很少使用 UTF-8 或 UTF-16 以外的其他格式.

发送端:

将字符串编码为字节(例如 text.getBytes(encodingName))
使用 Base64 类将字节编码为 base64
传输 base64

Encode the string to bytes (e.g. text.getBytes(encodingName))
Encode the bytes to base64 using the Base64 class
Transmit the base64

接收端:

接收base64
使用 Base64 类将 base64 解码为字节
将字节解码为字符串(例如new String(bytes, encodingName))

Receive the base64
Decode the base64 to bytes using the Base64 class
Decode the bytes to a string (e.g. new String(bytes, encodingName))

比如:

// Sending side
byte[] data = text.getBytes("UTF-8");
String base64 = Base64.encodeToString(data, Base64.DEFAULT);

// Receiving side
byte[] data = Base64.decode(base64, Base64.DEFAULT);
String text = new String(data, "UTF-8");

或者使用StandardCharsets:

// Sending side
byte[] data = text.getBytes(StandardCharsets.UTF_8);
String base64 = Base64.encodeToString(data, Base64.DEFAULT);

// Receiving side
byte[] data = Base64.decode(base64, Base64.DEFAULT);
String text = new String(data, StandardCharsets.UTF_8);

Base 64 编码和解码示例代码

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