How to use the "BASE64" framework in the Java class library

The "Base64" framework in the Java class library is a tool for coding and decoding for Base64.Base64 is a encoding method for converting binary data into ASCII characters. It is often used to transmit binary data to printed string during network transmission and storage. In Java, you can use the Base64 framework in the Java library to perform the base64 encoding and decoding operation.The following is the use of Base64 framework: 1. Code operation: To encode the binary data for the base64, you can use the `Base64.encoder` object of the` Base64 "class of the` Base64` class, and then use the object's `enacodetring (byte [] src) method to encode. import java.util.Base64; public class Base64Example { public static void main(String[] args) { String str = "Hello, World! Hello, the world!"; byte[] src = str.getBytes(); Base64.Encoder encoder = Base64.getEncoder(); String encodedStr = encoder.encodeToString(src); System.out.println("Encoded string: " + encodedStr); } } The above code "Hello, World! Hello, World!" Perform the base64 encoding and output the string after encoding. 2. Decoding operation: To decoding the Base64 -encoded string, you can use the `Base64.Decoder` object to use the` Base64` method of the `Base64` class, and then decoding the` DECODE (String SRC) method of the object. import java.util.Base64; public class Base64Example { public static void main(String[] args) { String encodedStr = "SGVsbG8sIFdvcmxkISDmmK/lv6Xor7fmoYjnmoTmn6/moYPliLbmnK/moYPvvIzkuI3lj7c="; Base64.Decoder decoder = Base64.getDecoder(); byte[] decodedBytes = decoder.decode(encodedStr); String decodedStr = new String(decodedBytes); System.out.println("Decoded string: " + decodedStr); } } The above code decodes the strings of Base64 and outputs the string after decoding. Through the Base64 framework, we can easily perform Base64 encoding and decoding operations. It is suitable for converting binary data into printed string or restoring the base64 -encoded string into original binary data.When transmitting or storing binary data on network, Base64 encoding is a very common tool.