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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。

本篇文章将演示如何在 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.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