Java 压缩zip格式文件

三个主要的类：

• import java.util.zip.ZipFile;//打开zip格式文件。
• import java.util.zip.ZipEntry; //标记被压缩文件的属性，主要是文件名和路径。
• import java.util.zip.ZipOutputStream;//zip格式输出流。

压缩文件夹时，需要挨个结点，递归压缩文件夹中所有的文件。

    public static void zipFile(String filePath, String zipPath) {
        try {
            File inFile = new File(filePath);
            File outFile = new File(zipPath);
            FileOutputStream fos = new FileOutputStream(outFile);
            ZipOutputStream zos = new ZipOutputStream(fos);
            zipFile(filePath, inFile, zos);
            zos.close();
            fos.close();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /** * 压缩文件夹 * @author flueky [email protected] * @date 2016年4月13日 下午7:47:11 * @param folderPath * @param zipPath */
    public static void zipFolder(String folderPath, String zipPath) {

        try {
            File inFile = new File(folderPath);
            File outFile = new File(zipPath);
            FileOutputStream fos = new FileOutputStream(outFile);
            ZipOutputStream zos = new ZipOutputStream(fos);
            zipFile(folderPath, inFile, zos);
            zos.close();
            fos.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

    /** * 递归压缩文件 * @author flueky [email protected] * @date 2016年4月13日 下午7:47:28 * @param folderPath * @param file * @param zos */
    private static void zipFile(String folderPath, File file, ZipOutputStream zos) {

        int index = folderPath.lastIndexOf(File.separator);

        try {
            if (file.isDirectory()) {// 文件夹,递归遍历文件夹下文件压缩
                File[] files = file.listFiles();
                if (files != null) {
                    for (File f : files)
                        zipFile(folderPath, f, zos);
                }
                return;
            }
            zos.putNextEntry(new ZipEntry(file.getAbsolutePath().substring(index)));
            byte[] buffer = new byte[1024];
            int length = -1;
            FileInputStream fis = new FileInputStream(file);
            while ((length = fis.read(buffer)) != -1) {
                zos.write(buffer, 0, length);
            }
            fis.close();

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    /** * 解压文件.zip格式 * * @author flueky [email protected] * @date 2016年4月13日 下午3:12:23 * @param zipFilePath * @param outFolderPath */
    public static void unzipFile(String zipFilePath, String outFolderPath) {

        try {
            ZipFile zipFile = new ZipFile(zipFilePath);

            Enumeration<ZipEntry> zList = (Enumeration<ZipEntry>) zipFile.entries();
            while (zList.hasMoreElements()) {
                ZipEntry zipEntry = zList.nextElement();
                if (zipEntry.getName().startsWith("__MACOSX"))// Mac
                                                                // 系统自带压缩工具生成,屏蔽
                    continue;
                if (!zipEntry.isDirectory()) {// 只解压文件
                    InputStream is = zipFile.getInputStream(zipEntry);
                    StringBuffer name = new StringBuffer(outFolderPath);
                    if (name.lastIndexOf(File.separator) != name.length() - 1) {
                        name.append(File.separator);
                    }
                    name.append(zipEntry.getName());
                    File outFile = new File(name.toString());
                    if (!outFile.getParentFile().exists())
                        outFile.getParentFile().mkdirs();
                    outFile.createNewFile();
                    FileOutputStream fos = new FileOutputStream(outFile);
                    int length = -1;
                    byte[] buffer = new byte[1024];
                    while ((length = is.read(buffer)) != -1) {
                        fos.write(buffer, 0, length);
                    }
                    // 关闭流
                    is.close();
                    fos.close();
                }

            }
            zipFile.close();

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }