Research on the technical principles of Base64 framework in the Java class library
Research on the technical principles of Base64 framework in the Java class library
Summary:
Base64 is a encoding method of encoding binary data as ASCII string, which is often used to convey binary data in network transmission.The Java class library provides Base64 framework, enabling developers to easily perform Base64 encoding and decoding operations.This article will explore the technical principles of the Base64 framework in the Java class library and attach the actual Java code example.
1. Base64 encoding principle
The base64 encoding is mainly based on dividing the input binary data into a fixed -length byte block, and converting each byte block into ASCII characters.The specific coding steps are as follows:
1) Divide the input binary data into a group of 3 bytes (each byte 8 bits).
2) Convert 24 -bit data to 4 6 -bit integer for each group of byte use operation operation operations.
3) Imam into the corresponding character in the Base64 character table.
4) If the input byte length is not a multiples of 3, you need to add appropriate amount of filling characters to the final byte block (usually use '=').
2. Use of the Base64 framework in the Java class library
The Java class library provides the Java.UTIL.BASE64 class, which contains the static method of the base64 encoding and decoding operation.Below is a sample code that demonstrates how to use the Java class library for base64 encoding and decoding:
import java.util.Base64;
public class Base64Example {
public static void main(String[] args) {
String Originaltext = "Hello, World!";
// base64 encoding
String encodedText = Base64.getEncoder().encodeToString(originalText.getBytes());
System.out.println ("Base64 encoding result:" + encodedtext);
// base64 decoding
byte[] decodedBytes = Base64.getDecoder().decode(encodedText);
String decodedText = new String(decodedBytes);
System.out.println ("Base64 decoding result:" + decodedtext);
}
}
3. Run results
The results of the above code are as follows:
Base64 encoding result: SGVSBG8SIOC4H-ACQOAKP-W4ug ==
Base64 decoding result: Hello, World!
4 Conclusion
Through the Base64 framework provided by the Java class library, developers can easily perform Base64 encoding and decoding operations.This encoding method is widely used in network transmission and storage, which can effectively convey binary data while ensuring the readability and integrity of data.
Summarize:
This article introduces the technical principles and usage methods of the Base64 framework in the Java class library, and provides an example of the actual Java code.Developers can flexibly apply Base64 encoding and decoding functions based on these examples.This encoding method plays an important role in processing binary data in network transmission and storage, which can help developers achieve safe and efficient data exchange.
