在 Java 中壓縮字串
Sheeraz Gul
2022年4月27日
當我們想要節省記憶體時,需要壓縮字串。在 Java 中,deflater
用於以位元組為單位壓縮字串。
本教程將演示如何在 Java 中壓縮字串。
在 Java 中使用 deflater
壓縮字串
deflater
是 Java 中的物件建立器,它壓縮輸入資料並用壓縮資料填充指定的緩衝區。
例子:
import java.util.zip.*;
import java.io.UnsupportedEncodingException;
class Compress_Class {
public static void main(String args[]) throws UnsupportedEncodingException {
// Using the deflater object
Deflater new_deflater = new Deflater();
String Original_string = "This is Delftstack ", repeated_string = "";
// Generate a repeated string
for (int i = 0; i < 5; i++){
repeated_string += Original_string;
}
// Convert the repeated string into bytes to set the input for the deflator
new_deflater.setInput(repeated_string.getBytes("UTF-8"));
new_deflater.finish();
// Generating the output in bytes
byte compressed_string[] = new byte[1024];
// Storing the compressed string data in compressed_string. the size for compressed string will be 13
int compressed_size = new_deflater.deflate(compressed_string, 5, 15, Deflater.FULL_FLUSH);
// The compressed String
System.out.println("The Compressed String Output: " + new String(compressed_string) + "\n Size: " + compressed_size);
//The Original String
System.out.println("The Original Repeated String: " + repeated_string + "\n Size: " + repeated_string.length());
new_deflater.end();
}
}
上面的程式碼使用 deflater
來設定轉換為位元組的字串的輸入並對其進行壓縮。
輸出:
The Compressed String Output: xœ
ÉÈ,V
Size: 15
The Original Repeated String: This is Delftstack This is Delftstack This is Delftstack This is Delftstack This is Delftstack
Size: 95
Author: Sheeraz Gul
Sheeraz is a Doctorate fellow in Computer Science at Northwestern Polytechnical University, Xian, China. He has 7 years of Software Development experience in AI, Web, Database, and Desktop technologies. He writes tutorials in Java, PHP, Python, GoLang, R, etc., to help beginners learn the field of Computer Science.
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