java 線上解壓zip檔案

要在Java中進行線上解壓ZIP檔案，你可以使用java.util.zip包中的ZipInputStream類。下面是一個簡單的示例代碼，可以用于線上解壓ZIP檔案：

javaCopy code
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

public class UnzipExample {
    public static void main(String[] args) {
        String zipFilePath = "path/to/your/zip/file.zip";
        String destDirectory = "path/to/destination/directory";
        
        try {
            unzip(zipFilePath, destDirectory);
            System.out.println("檔案解壓成功！");
        } catch (IOException e) {
            System.out.println("解壓檔案時發生錯誤：" + e.getMessage());
        }
    }
    
    public static void unzip(String zipFilePath, String destDirectory) throws IOException {
        File destDir = new File(destDirectory);
        if (!destDir.exists()) {
            destDir.mkdirs();
        }
        
        try (ZipInputStream zipIn = new ZipInputStream(Files.newInputStream(Paths.get(zipFilePath)))) {
            ZipEntry entry = zipIn.getNextEntry();
            while (entry != null) {
                String filePath = destDirectory + File.separator + entry.getName();
                if (!entry.isDirectory()) {
                    extractFile(zipIn, filePath);
                } else {
                    File dir = new File(filePath);
                    dir.mkdirs();
                }
                zipIn.closeEntry();
                entry = zipIn.getNextEntry();
            }
        }
    }
    
    private static void extractFile(ZipInputStream zipIn, String filePath) throws IOException {
        try (FileOutputStream fos = new FileOutputStream(filePath)) {
            byte[] buffer = new byte[1024];
            int bytesRead;
            while ((bytesRead = zipIn.read(buffer)) != -1) {
                fos.write(buffer, 0, bytesRead);
            }
        }
    }
}           

你需要将zipFilePath和destDirectory替換為你自己的ZIP檔案路徑和解壓目标路徑。當你運作這個代碼時，它将解壓ZIP檔案到指定的目标目錄中。