Java 文件压缩和解压

太过爱你忘了你带给我的痛 2022-06-02 10:18 247阅读 0赞

package com.wkk.util;
    
    import java.io.*;
    import java.util.zip.*;
    
    public class Util {
        
    
        /**
         * 压缩文件
         *
         * @param zipPath 文件压缩后生成的文件路径
         * @param f       需要压缩的文件
         * @throws IOException
         */
        public static void compressionFile(String zipPath, File f) throws IOException {
            ZipOutputStream zipOutputStream = new ZipOutputStream(new FileOutputStream(zipPath));
            File files[] = new File[]{f};
            for (int i = 0; i < files.length; i++) {
                File file = files[i];
                if (file.isDirectory()) {
                    isDirectory(zipOutputStream, file, file.getName());
                } else if (file.isFile()) {
                    isFile(zipOutputStream, file, "");
                }
            }
            zipOutputStream.flush();
            zipOutputStream.close();
        }
    
        private static void isDirectory(ZipOutputStream zipOutputStream, File file, String pathName) throws IOException {
            File[] files = file.listFiles();
            if (files.length > 0) {
                for (int i = 0; i < files.length; i++) {
                    File file1 = files[i];
                    if (file1.isDirectory()) {
                        isDirectory(zipOutputStream, file1, pathName + File.separator + file1.getName());
                    } else if (file1.isFile()) {
                        isFile(zipOutputStream, file1, pathName);
                    }
                }
            } else {
                String name = pathName + "/";
                ZipEntry zipEntry = new ZipEntry(name);
                zipOutputStream.putNextEntry(zipEntry);
                zipOutputStream.closeEntry();
            }
        }
    
        private static void isFile(ZipOutputStream zipOutputStream, File file, String pathName) throws IOException {
            ZipEntry zipEntry = null;
            if (pathName == null || pathName.equalsIgnoreCase("")) {
                zipEntry = new ZipEntry(file.getName());
            } else {
                zipEntry = new ZipEntry(pathName + File.separator + file.getName());
            }
            zipOutputStream.putNextEntry(zipEntry);
            FileInputStream fileInputStream = new FileInputStream(file);
            byte[] b = new byte[1024];
            int l = 0;
            while ((l = fileInputStream.read(b)) > 0) {
                zipOutputStream.write(b, 0, l);
            }
            fileInputStream.close();
            zipOutputStream.closeEntry();
        }
    
    
        /**
         * 解压文件 如果压缩文件中有文件夹将会发生异常
         *
         * @param zipFilePath 压缩文件路径
         * @param unpackPath  解压后文件存放路径
         * @throws IOException
         */
        public static void UnpackFile(String zipFilePath, String unpackPath) throws IOException {
            File file = new File(zipFilePath);
            ZipFile zipFile = new ZipFile(file);
            ZipInputStream zipInputStream = new ZipInputStream(new FileInputStream(file));
            ZipEntry zipEntry = null;
            while ((zipEntry = zipInputStream.getNextEntry()) != null) {
                String path = unpackPath + "\\" + zipEntry.getName();
                new File(path).mkdirs();
                if (zipEntry.isDirectory()) {
                    continue;
                }
                new File(path).delete();
                FileOutputStream fileOutputStream = new FileOutputStream(new File(path));
                InputStream inputStream = zipFile.getInputStream(zipEntry);
                byte b[] = new byte[1024];
                int l = 0;
                while ((l = inputStream.read(b)) > 0) {
                    fileOutputStream.write(b, 0, l);
                }
                inputStream.close();
                fileOutputStream.flush();
                fileOutputStream.close();
            }
            zipFile.close();
            zipInputStream.close();
        }
    
    }

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