java 解压压缩文件

以下是使用Java进行文件压缩和解压缩的示例代码：

1. 使用java.util.zip包进行压缩和解压缩：

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

public class ZipUtil {
    public static void compressFile(String sourceFilePath, String destinationFilePath) throws IOException {
        FileOutputStream fos = new FileOutputStream(destinationFilePath);
        ZipOutputStream zipOut = new ZipOutputStream(fos);
        File fileToZip = new File(sourceFilePath);

        zipFile(fileToZip, fileToZip.getName(), zipOut);
        zipOut.close();
        fos.close();
    }

    private static void zipFile(File fileToZip, String fileName, ZipOutputStream zipOut) throws IOException {
        if (fileToZip.isHidden()) {
            return;
        }
        if (fileToZip.isDirectory()) {
            if (fileName.endsWith("/")) {
                zipOut.putNextEntry(new ZipEntry(fileName));
                zipOut.closeEntry();
            } else {
                zipOut.putNextEntry(new ZipEntry(fileName + "/"));
                zipOut.closeEntry();
            }
            File[] children = fileToZip.listFiles();
            for (File childFile : children) {
                zipFile(childFile, fileName + "/" + childFile.getName(), zipOut);
            }
            return;
        }
        FileInputStream fis = new FileInputStream(fileToZip);
        ZipEntry zipEntry = new ZipEntry(fileName);
        zipOut.putNextEntry(zipEntry);
        byte[] bytes = new byte[1024];
        int length;
        while ((length = fis.read(bytes)) >= 0) {
            zipOut.write(bytes, 0, length);
        }
        fis.close();
    }

    public static void decompressFile(String zipFilePath, String destinationFolderPath) throws IOException {
        File destDir = new File(destinationFolderPath);
        if (!destDir.exists()) {
            destDir.mkdir();
        }
        ZipInputStream zipIn = new ZipInputStream(new FileInputStream(zipFilePath));
        ZipEntry entry = zipIn.getNextEntry();
        while (entry != null) {
            String filePath = destinationFolderPath + File.separator + entry.getName();
            if (!entry.isDirectory()) {
                extractFile(zipIn, filePath);
            } else {
                File dir = new File(filePath);
                dir.mkdir();
            }
            zipIn.closeEntry();
            entry = zipIn.getNextEntry();
        }
        zipIn.close();
    }

    private static void extractFile(ZipInputStream zipIn, String filePath) throws IOException {
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(filePath));
        byte[] bytesIn = new byte[1024];
        int read;
        while ((read = zipIn.read(bytesIn)) != -1) {
            bos.write(bytesIn, 0, read);
        }
        bos.close();
    }
}

2. 使用Apache Commons Compress库进行压缩和解压缩：

import org.apache.commons.compress.archivers.ArchiveEntry;
import org.apache.commons.compress.archivers.ArchiveInputStream;
import org.apache.commons.compress.archivers.ArchiveOutputStream;
import org.apache.commons.compress.archivers.zip.ZipArchiveEntry;
import org.apache.commons.compress.archivers.zip.ZipArchiveInputStream;
import org.apache.commons.compress.archivers.zip.ZipArchiveOutputStream;
import org.apache.commons.compress.utils.IOUtils;

import java.io.*;

public class ZipUtil {
    public static void compressFile(String sourceFilePath, String destinationFilePath) throws IOException {
        FileOutputStream fos = new FileOutputStream(destinationFilePath);
        ArchiveOutputStream zipOut = new ZipArchiveOutputStream(fos);
        File fileToZip = new File(sourceFilePath);

        zipFile(fileToZip, fileToZip.getName(), zipOut);
        zipOut.close();
        fos.close();
    }

    private static void zipFile(File fileToZip, String fileName, ArchiveOutputStream zipOut) throws IOException {
        if (fileToZip.isHidden()) {
            return;
        }
        if (fileToZip.isDirectory()) {
            if (fileName.endsWith("/")) {
                zipOut.putArchiveEntry(new ZipArchiveEntry(fileName));
                zipOut.closeArchiveEntry();
            } else {
                zipOut.putArchiveEntry(new ZipArchiveEntry(fileName + "/"));
                zipOut.closeArchiveEntry();
            }
            File[] children = fileToZip.listFiles();
            for (File childFile : children) {
                zipFile(childFile, fileName + "/" + childFile.getName(), zipOut);
            }
            return;
        }
        FileInputStream fis = new FileInputStream(fileToZip);
        ArchiveEntry zipEntry = new ZipArchiveEntry(fileName);
        zipOut.putArchiveEntry(zipEntry);
        IOUtils.copy(fis, zipOut);
        fis.close();
        zipOut.closeArchiveEntry();
    }

    public static void decompressFile(String zipFilePath, String destinationFolderPath) throws IOException {
        File destDir = new File(destinationFolderPath);
        if (!destDir.exists()) {
            destDir.mkdir();
        }
        FileInputStream fis = new FileInputStream(zipFilePath);
        ArchiveInputStream zipIn = new ZipArchiveInputStream(fis);
        ArchiveEntry entry = zipIn.getNextEntry();
        while (entry != null) {
            String filePath = destinationFolderPath + File.separator + entry.getName();
            if (!entry.isDirectory()) {
                extractFile(zipIn, filePath);
            } else {
                File dir = new File(filePath);
                dir.mkdir();
            }
            zipIn.closeEntry();
            entry = zipIn.getNextEntry();
        }
        zipIn.close();
        fis.close();
    }

    private static void extractFile(ArchiveInputStream zipIn, String filePath) throws IOException {
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(filePath));
        IOUtils.copy(zipIn, bos);
        bos.close();
    }
}