Use the Angular Base64 framework to implement the data compression function in the Java class library
Use the Angular Base64 framework to implement the data compression function in the Java class library
introduce:
Data compression is a common technology that is used to reduce the volume of data, thereby saving storage space and improving data transmission efficiency.In Java development, we can use some class libraries to achieve data compression function.This article will introduce how to use the Angular Base64 framework to implement the data compression function in the Java class library.
1. Angular Base64 framework
Angular Base64 is a simple and easy -to -use Base64 encoding and decoding framework, which can easily encode or decoding data for data.In the examples of this article, we will use this framework to achieve data compression and decompression.
2. Realization of data compression
1. First, we need to add the dependencies of the Angular Base64 framework.Add the following in the Package.json file in your project: add the following:
json
"dependencies": {
"angular-base64": "^3.1.0"
}
2. Then, use the NPM Install command to install dependencies:
npm install
3. In Java, we can use the DEFLATER class in the Java class library to implement the compression function of data.The following is a simple example:
import java.io.ByteArrayOutputStream;
import java.util.zip.Deflater;
public class DataCompressionUtil {
public static byte[] compressData(byte[] data) {
Deflater deflater = new Deflater();
deflater.setInput(data);
deflater.finish();
ByteArrayOutputStream outputStream = new ByteArrayOutputStream(data.length);
byte[] buffer = new byte[1024];
while (!deflater.finished()) {
int count = deflater.deflate(buffer);
outputStream.write(buffer, 0, count);
}
deflater.end();
return outputStream.toByteArray();
}
}
4. In Angular, we can use the Angular Base64 framework to coded the data 64.The following is a simple example:
typescript
import { Component } from '@angular/core';
import { Base64 } from 'angular-base64';
@Component({
selector: 'app-compress',
template: `
<div>
Compressed Data: {{ compressedData }}
</div>
`
})
export class CompressComponent {
dataToCompress = 'Hello, World!';
compressedData: string;
constructor(private base64: Base64) {}
compressData(): void {
const compressedBytes = this.compress(this.dataToCompress);
this.compressedData = this.base64.encode(compressedBytes);
}
private compress(data: string): Uint8Array {
// Convert data to the byte array of UINT8ARAY type
const encoder = new TextEncoder();
const bytes = encoder.encode(data);
// Call the back -end data compression service
// The compressData method here is the data compression method of the back end.
const compressedBytes = this.compressData(bytes);
return compressedBytes;
}
private compressData(data: Uint8Array): Uint8Array {
// Call the back -end data compression service
// Here, suppose we have implemented an interface of a back -end data compression function, and data compression is compressed by sending requests
// The URL here needs to be modified according to the actual situation
const url = 'http://localhost:8080/compress';
const options = {
method: 'POST',
body: data
};
// send request
return fetch(url, options)
.then(response => response.arrayBuffer())
.then(arrayBuffer => new Uint8Array(arrayBuffer));
}
}
in conclusion:
By using the Angular Base64 framework, we can easily implement the data compression function in the Java library.In this article, we demonstrate how to use the Angular Base64 framework combined with the Deflator class in the Java class library to achieve data compression function.I hope this article will help you understand and realize the data compression function.
