如何在Java中打包/加密/解压缩/解密一堆文件?

如果你知道如何使用创建zip文件 java.util.zip 包,您可以创建PBE Cipher

以下内容应该能让你开始:

public class ZipTest {

    public static void main(String [] args) throws Exception {
        String password = "password";
        write(password);
        read(password);
    }

    private static void write(String password) throws Exception {
        OutputStream target = new FileOutputStream("out.zip");
        target = new CipherOutputStream(target, createCipher(Cipher.ENCRYPT_MODE, password));
        ZipOutputStream output = new ZipOutputStream(target);

        ZipEntry e = new ZipEntry("filename");
        output.putNextEntry(e);
        output.write("helloWorld".getBytes());
        output.closeEntry();

        e = new ZipEntry("filename1");
        output.putNextEntry(e);
        output.write("helloWorld1".getBytes());
        output.closeEntry();

        output.finish();
        output.flush();
    }

    private static Cipher createCipher(int mode, String password) throws Exception {
        String alg = "PBEWithSHA1AndDESede"; //BouncyCastle has better algorithms
        PBEKeySpec keySpec = new PBEKeySpec(password.toCharArray());
        SecretKeyFactory keyFactory = SecretKeyFactory.getInstance(alg);
        SecretKey secretKey = keyFactory.generateSecret(keySpec);

        Cipher cipher = Cipher.getInstance("PBEWithSHA1AndDESede");
        cipher.init(mode, secretKey, new PBEParameterSpec("saltsalt".getBytes(), 2000));

        return cipher;
    }

    private static void read(String password) throws Exception {
        InputStream target = new FileInputStream("out.zip");
        target = new CipherInputStream(target, createCipher(Cipher.DECRYPT_MODE, password));
        ZipInputStream input = new ZipInputStream(target);
        ZipEntry entry = input.getNextEntry();
        while (entry != null) {
            System.out.println("Entry: "+entry.getName());
            System.out.println("Contents: "+toString(input));
            input.closeEntry();
            entry = input.getNextEntry();
        }
    }

    private static String toString(InputStream input) throws Exception {
        byte [] data = new byte[1024];
        StringBuilder result = new StringBuilder();

        int bytesRead = input.read(data);
        while (bytesRead != -1) {
            result.append(new String(data, 0, bytesRead));
            bytesRead = input.read(data);
        }

        return result.toString();
    } 
}

答案已经给出了(正如Kevin指出的那样,使用密码),所以我只是对你的主题中似乎缺少的一个重要问题提出建议。开始:确保你使用 HTTPS 而不是 HTTP Tomcat SSL HOW-TO .

希望这能有所帮助。

truecrypt 可能有用。您的Web服务器可以创建一个加密容器,将zip文件复制到其中。然后可以下载加密的容器。可能有点混乱,但加密应该很强,下载的图像可以安装在各种操作系统上。

这里肯定有一些关于如何解决你的问题的建议,但我在回复中错过了一个非常大的但。对于“强加密”的任何合理定义,您都不能同时满足“基于密码”和“强加密“的要求。