Detailed explanation of the technical principles of Base64 framework in the Java class library

Detailed explanation of the technical principles of the Base64 framework in the Java class library Summary: Base64 is a common encoding format that can convert binary data into readable ASCII string, which facilitates the processing and storage of data during transmission.The Base64 framework in the Java class library provides a class and method for coding and decoding for Base64.This article will analyze the technical principles of the Base64 framework in the Java class library and provide the corresponding Java code example. 1. Base64 coding principle: Base64 encoding algorithm By dividing the original binary data into 6 -bit byte blocks, and converting each byte block into a corresponding printed character, the data encoding is achieved.Each byte block contains 6 binary positions, which can indicate 64 different values.Base64 uses 64 printed characters as a coding table to encode all byte blocks. Second, the class of Base64 framework in the Java class library: The Base64 framework in the Java class library mainly includes the following classes: 1. Base64: Responsible for providing static methods for Base64 encoding and decoding. 2. Base64.DEcoder: Class for decoding Base64 encoding. 3. Base64.encoder: Class for data encoding data for data. 3. Base64 encoding example code in the Java class library: Below is an example code that shows the base64 encoding in the Java class library: import java.util.Base64; public class Base64Example { public static void main(String[] args) { // Raw data String data = "Hello World!"; // Perform the base64 encoding String encodedData = Base64.getEncoder().encodeToString(data.getBytes()); System.out.println ("The data coded by Base64:" + ENCODEDDATA); // Perform the base64 decoding byte[] decodedData = Base64.getDecoder().decode(encodedData); String decodedString = new String(decodedData); System.out.println ("Base64 decoding data:" + decodedstring); } } In the above code, we first convert the string "Hello World!" To byte array, and then call `base64.Getencoder (). Encodetostring ()` method to encod in base64.The encoded data is stored in a string and outputs it to the console. Then we decode the base64 decoding of the string that I just got.Use the `Base64.getDecoder (). Decode ()` method to convert the encoded string to byte array, and finally convert the byte array to a string and output it to the console. Fourth, summary: This article explains the principle of the Base64 encoding algorithm and the use of the Base64 framework in the Java class library.Through the Base64 framework in the Java library, we can easily encode and decode binary data.In practical applications, the base64 encoding is often used to transmit and store binary data in the readable ASCII format, especially in network transmission. It is hoped that this article can help readers better understand the technical principles and usage methods of the Base64 framework in the Java class library, and provide guidance and reference for future coding decoding operations.