java创建文件夹和遍历压缩文件夹或者文件

谁践踏了优雅 2024-03-24 08:50 21阅读 0赞

### 1：遍历压缩文件中的文件夹(包括空文件)和文件 ###

package org.xqf.common.es;
    
    /**
     * @Author xu
     * @create 2023/3/24 17
     */
    
    import lombok.SneakyThrows;
    
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.zip.ZipEntry;
    import java.util.zip.ZipOutputStream;
    
    public class ZipFolderExampleTest2 {
        
    
        @SneakyThrows
        public static void main(String[] args) {
        
        //创建临时temp文件
    	//    File zipFile = File.createTempFile("example", ".zip");
            List<String> sourceFolderList=new ArrayList<>();
            sourceFolderList.add("aa");
            sourceFolderList.add("bb");
            String sourceFolder = "C:\\Users\\dell\\Desktop\\folder\\";
            String zipFilePath = "C:\\Users\\dell\\Desktop\\folder.zip";
    
            try {
        
                FileOutputStream fos = new FileOutputStream(zipFilePath);
                ZipOutputStream zos = new ZipOutputStream(fos);
                File sourceFile = new File(sourceFolder);
                sourceFile.mkdirs();
                if (sourceFile.exists()) {
        
    
                    for (String floder : sourceFolderList) {
        
                        File file = new File(sourceFolder + floder);
                        file.mkdir();
                        System.out.println(file.getName());
                    }
                    addFolderToZip(sourceFile, sourceFile.getName(), zos);
                    zos.finish();
                    zos.close();
                    fos.close();
                    System.out.println("Folder has been compressed successfully!");
                } else {
        
                    System.out.println("Source folder does not exist!");
                }
    //            zipFile.delete();
            } catch (IOException e) {
        
                e.printStackTrace();
            }
        }
    
        private static void addFolderToZip(File folder, String parentFolder, ZipOutputStream zos) throws IOException {
        
            for (File file : folder.listFiles()) {
        
                //file.list().length 判断目录下面是否有文件或者目录，没有直接创建，有继续循环
                if (file.isDirectory() && file.list().length > 0) {
        
                    addFolderToZip(file, parentFolder + "/" + file.getName(), zos);
                    continue;
                }
                if (!file.isDirectory()) {
        
                    zos.putNextEntry(new ZipEntry(parentFolder + "/" + file.getName()));
                    FileInputStream fis = new FileInputStream(file);
                    byte[] buffer = new byte[1024];
                    int length;
    
                    while ((length = fis.read(buffer)) > 0) {
        
                        zos.write(buffer, 0, length);
                    }
                    fis.close();
                } else {
        
                    zos.putNextEntry(new ZipEntry(parentFolder + "/" + file.getName() + "/"));
                }
                zos.closeEntry();
            }
        }
    }

### 2：如果需要过滤空文件夹，修改方法addFolderToZip ###

rivate 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;
                }
                    zos.putNextEntry(new ZipEntry(parentFolder + "/" + file.getName()));
                    FileInputStream fis = new FileInputStream(file);
                    byte[] buffer = new byte[1024];
                    int length;
    
                    while ((length = fis.read(buffer)) > 0) {
        
                        zos.write(buffer, 0, length);
                    }
                    fis.close();
                } else {
        
                zos.closeEntry();
            }
        }

### 3：创建空文件夹并压缩 ###

在这里插入代码片package org.jeecg.common.es;
    
    /**
     * @Author xu
     * @create 2023/3/24 17
     */
    
    import java.io.File;
    import java.io.IOException;
    import java.nio.file.Files;
    import java.nio.file.Path;
    import java.nio.file.Paths;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.zip.ZipEntry;
    import java.util.zip.ZipOutputStream;
    
    public class ZipFolderExampleTest3 {
        
    
        public static void main(String[] args) throws IOException {
        
            // 定义要创建的空文件夹
            List<String> folders = new ArrayList<>();
            folders.add("folder1");
            folders.add("folder2");
            folders.add("folder3");
    
            // 创建空文件夹
            for (String folderName : folders) {
        
                File folder = new File(folderName);
                if (!folder.exists()) {
        
                    folder.mkdir();
                }
            }
    
            // 压缩文件夹
            Path zipFilePath = Paths.get("folders.zip");
            ZipOutputStream zipOutputStream = new ZipOutputStream(Files.newOutputStream(zipFilePath));
            for (String folderName : folders) {
        
                File folder = new File(folderName);
                if (folder.exists()) {
        
                    String folderPath = folder.getPath();
                    if (folderPath.endsWith("/")) {
        
                        folderPath = folderPath.substring(0, folderPath.length() - 1);
                    }
                    ZipEntry zipEntry = new ZipEntry(folderPath.substring(folderPath.lastIndexOf("/") + 1) + "/");
                    zipOutputStream.putNextEntry(zipEntry);
                    zipOutputStream.closeEntry();
                }
                folder.delete();
            }
    
            zipOutputStream.close();
        }
    }