java 压缩文件夹

要压缩Java文件夹，您可以使用Java的ZipOutputStream类。以下是一个基本的示例代码来压缩一个文件夹：

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class ZipFolderExample {
    public static void main(String[] args) {
        String folderPath = "path/to/folder";
        String zipFilePath = "path/to/zipfile.zip";
        
        try (FileOutputStream fos = new FileOutputStream(zipFilePath);
             ZipOutputStream zos = new ZipOutputStream(fos)) {
            
            File folder = new File(folderPath);
            addFolderToZip(folder, folder.getName(), zos);
            
            System.out.println("Folder successfully compressed.");
            
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    private static void addFolderToZip(File folder, String parentFolder, ZipOutputStream zos)
            throws IOException {
        
        for (File file : folder.listFiles()) {
            if (file.isDirectory()) {
                addFolderToZip(file, parentFolder + "/" + file.getName(), zos);
                continue;
            }
            
            FileInputStream fis = new FileInputStream(file);            
            String entryPath = parentFolder + "/" + file.getName();
            ZipEntry zipEntry = new ZipEntry(entryPath);
            zos.putNextEntry(zipEntry);
            
            byte[] buffer = new byte[1024];
            int length;
            while ((length = fis.read(buffer)) > 0) {
                zos.write(buffer, 0, length);
            }
            
            fis.close();
        }
    }
}

请注意，您需要将`folderPath`替换为要压缩的实际文件夹的路径，并将`zipFilePath`替换为要创建的压缩文件的路径。