HOWTO · Java
在 Java 中压缩字符串
本教程演示了如何使用 deflater 在 Java 中压缩字符串。
当我们想要节省内存时,需要压缩字符串。在 Java 中,deflater 用于以字节为单位压缩字符串。
本教程将演示如何在 Java 中压缩字符串。
在 Java 中使用 deflater 压缩字符串
deflater 是 Java 中的对象创建器,它压缩输入数据并用压缩数据填充指定的缓冲区。
例子:
import java.io.UnsupportedEncodingException;
import java.util.zip.*;
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();
}
}
上面的代码使用 deflater 来设置转换为字节的字符串的输入并对其进行压缩。
输出:
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