java 分卷压缩

Java提供了ZipOutputStream和ZipEntry类来进行分卷压缩。下面是一个简单的示例代码：

import java.io.*;
import java.util.zip.*;

public class ZipSplitter {
    public static void main(String[] args) throws IOException {
        String inputFileName = "input.txt";
        String outputFileName = "output.zip";
        int segmentSize = 1024 * 1024; // 1MB

        FileInputStream inputStream = new FileInputStream(inputFileName);
        byte[] buffer = new byte[segmentSize];
        int segmentNumber = 0;

        while (true) {
            ZipOutputStream outputStream = new ZipOutputStream(new FileOutputStream(outputFileName + "." + segmentNumber));
            outputStream.putNextEntry(new ZipEntry(inputFileName));

            int bytesRead = inputStream.read(buffer);
            if (bytesRead == -1) {
                break;
            }

            outputStream.write(buffer, 0, bytesRead);
            outputStream.closeEntry();
            outputStream.close();

            segmentNumber++;
        }

        inputStream.close();
    }
}

在上面的示例中，我们将输入文件 `input.txt` 分卷压缩成每个文件大小为 1MB 的 Zip 文件。输出文件名为 `output.zip.0`、`output.zip.1`、`output.zip.2` 等。你可以根据自己的需求修改输入文件名、输出文件名和分卷大小。