java字符串压缩传输的方法是什么 - 问答

Java中可以使用压缩算法对字符串进行压缩传输，常用的压缩方法有以下几种：

GZIP压缩：可以使用Java的GZIPOutputStream类进行压缩，使用GZIPInputStream类进行解压缩。可以使用以下代码进行压缩和解压缩：

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

public class GZIPCompression {
    public static byte[] compress(String data) throws IOException {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        GZIPOutputStream gzip = new GZIPOutputStream(bos);
        gzip.write(data.getBytes("UTF-8"));
        gzip.close();
        byte[] compressedData = bos.toByteArray();
        bos.close();
        return compressedData;
    }

    public static String decompress(byte[] compressedData) throws IOException {
        ByteArrayInputStream bis = new ByteArrayInputStream(compressedData);
        GZIPInputStream gzip = new GZIPInputStream(bis);
        byte[] buffer = new byte[1024];
        StringBuilder sb = new StringBuilder();
        int len;
        while ((len = gzip.read(buffer)) != -1) {
            sb.append(new String(buffer, 0, len, "UTF-8"));
        }
        gzip.close();
        bis.close();
        return sb.toString();
    }

    public static void main(String[] args) throws IOException {
        String originalString = "This is a test string";
        byte[] compressedData = compress(originalString);
        String decompressedString = decompress(compressedData);
        System.out.println("Original string: " + originalString);
        System.out.println("Compressed data: " + new String(compressedData));
        System.out.println("Decompressed string: " + decompressedString);
    }
}

Deflater压缩：可以使用Java的Deflater类进行压缩，使用Inflater类进行解压缩。可以使用以下代码进行压缩和解压缩：

import java.io.ByteArrayOutputStream;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.zip.Deflater;
import java.util.zip.Inflater;

public class DeflaterCompression {
    public static byte[] compress(String data) throws IOException {
        byte[] input = data.getBytes("UTF-8");
        Deflater deflater = new Deflater();
        deflater.setInput(input);
        ByteArrayOutputStream bos = new ByteArrayOutputStream(input.length);
        deflater.finish();
        byte[] buffer = new byte[1024];
        while (!deflater.finished()) {
            int count = deflater.deflate(buffer);
            bos.write(buffer, 0, count);
        }
        bos.close();
        byte[] compressedData = bos.toByteArray();
        return compressedData;
    }

    public static String decompress(byte[] compressedData) throws IOException {
        Inflater inflater = new Inflater();
        inflater.setInput(compressedData);
        ByteArrayOutputStream bos = new ByteArrayOutputStream(compressedData.length);
        byte[] buffer = new byte[1024];
        while (!inflater.finished()) {
            int count = inflater.inflate(buffer);
            bos.write(buffer, 0, count);
        }
        bos.close();
        byte[] decompressedData = bos.toByteArray();
        return new String(decompressedData, "UTF-8");
    }

    public static void main(String[] args) throws IOException {
        String originalString = "This is a test string";
        byte[] compressedData = compress(originalString);
        String decompressedString = decompress(compressedData);
        System.out.println("Original string: " + originalString);
        System.out.println("Compressed data: " + new String(compressedData));
        System.out.println("Decompressed string: " + decompressedString);
    }
}

这些方法可以将字符串进行压缩，然后传输。在接收端，再进行解压缩操作，恢复原始字符串。

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