如何在Java中处理Zip的格式

在Java中处理ZIP文件格式，您可以使用java.util.zip包中的类

1. 创建一个新的ZIP文件并添加文件到ZIP文件中：

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

public class ZipExample {
    public static void main(String[] args) {
        String zipFileName = "example.zip";
        String fileToZip = "example.txt";

        try {
            FileOutputStream fos = new FileOutputStream(zipFileName);
            ZipOutputStream zos = new ZipOutputStream(fos);

            ZipEntry ze = new ZipEntry(fileToZip);
            zos.putNextEntry(ze);

            FileInputStream fis = new FileInputStream(fileToZip);
            byte[] buffer = new byte[1024];
            int length;

            while ((length = fis.read(buffer)) > 0) {
                zos.write(buffer, 0, length);
            }

            zos.closeEntry();
            zos.close();
            fis.close();
            fos.close();

            System.out.println("File added to ZIP archive.");

        } catch (IOException e) {
            System.out.println("Error occurred while creating ZIP archive.");
            e.printStackTrace();
        }
    }
}

2. 从ZIP文件中提取文件：

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

public class UnzipExample {
    public static void main(String[] args) {
        String zipFileName = "example.zip";
        String destDirectory = "extracted/";

        File destDir = new File(destDirectory);
        if (!destDir.exists()) {
            destDir.mkdir();
        }

        try {
            FileInputStream fis = new FileInputStream(zipFileName);
            ZipInputStream zis = new ZipInputStream(fis);
            ZipEntry ze = zis.getNextEntry();

            while (ze != null) {
                String fileName = destDirectory + ze.getName();

                if (!ze.isDirectory()) {
                    extractFile(zis, fileName);
                } else {
                    File dir = new File(fileName);
                    dir.mkdirs();
                }

                zis.closeEntry();
                ze = zis.getNextEntry();
            }

            zis.close();
            fis.close();

            System.out.println("Files extracted from ZIP archive.");

        } catch (IOException e) {
            System.out.println("Error occurred while extracting files from ZIP archive.");
            e.printStackTrace();
        }
    }

    private static void extractFile(ZipInputStream zis, String fileName) throws IOException {
        FileOutputStream fos = new FileOutputStream(fileName);
        byte[] buffer = new byte[1024];
        int length;

        while ((length = zis.read(buffer)) > 0) {
            fos.write(buffer, 0, length);
        }

        fos.close();
    }
}

这两个示例分别演示了如何创建一个包含单个文件的ZIP文件以及如何从ZIP文件中提取所有文件。您可以根据需要修改这些示例以满足您的需求。