在 Java 中进行 ZIP 文件的加密可以通过不同的方式实现。我将为您介绍两种常见的实现方式:使用 Java 标准库和使用第三方库,分别以 Maven 和 Gradle 的依赖坐标为例。
步骤流程:
ZipOutputStream
类创建一个新的 ZIP 文件。CipherOutputStream
)来加密文件内容。示例代码:
import java.io.*;
import java.util.zip.*;
public class ZipEncryptionExample {
public static void main(String[] args) throws IOException {
String sourceFilePath = "path/to/source/file";
String zipFilePath = "path/to/output/encrypted.zip";
String password = "your_password_here";
// Step 1
File tempDir = new File("tempDir");
tempDir.mkdir();
// Step 2
FileOutputStream fos = new FileOutputStream(zipFilePath);
ZipOutputStream zipOut = new ZipOutputStream(fos);
// Step 3
File sourceFile = new File(sourceFilePath);
FileInputStream fis = new FileInputStream(sourceFile);
ZipEntry zipEntry = new ZipEntry(sourceFile.getName());
zipOut.putNextEntry(zipEntry);
// Step 4: Encrypt the content
byte[] buffer = new byte[1024];
int len;
Cipher cipher;
try {
cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
// Initialize cipher with password-derived key
// ...
CipherOutputStream cos = new CipherOutputStream(zipOut, cipher);
while ((len = fis.read(buffer)) > 0) {
cos.write(buffer, 0, len);
}
cos.close();
} catch (Exception e) {
e.printStackTrace();
}
// Step 5
fis.close();
zipOut.closeEntry();
zipOut.close();
fos.close();
// Clean up temp files
// ...
System.out.println("ZIP encryption complete.");
}
}
请注意,上述示例只是一个框架,您需要根据实际需求和加密算法对代码进行适当的修改。
步骤流程:
Maven 依赖:
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-compress</artifactId>
<version>1.21</version>
</dependency>
Gradle 依赖:
implementation 'org.apache.commons:commons-compress:1.21'
示例代码:
import org.apache.commons.compress.archivers.zip.*;
import org.apache.commons.compress.utils.IOUtils;
import java.io.*;
import java.util.zip.ZipEntry;
public class ZipEncryptionExample {
public static void main(String[] args) throws IOException {
String sourceFilePath = "path/to/source/file";
String zipFilePath = "path/to/output/encrypted.zip";
String password = "your_password_here";
FileOutputStream fos = new FileOutputStream(zipFilePath);
ZipArchiveOutputStream zipOut = new ZipArchiveOutputStream(fos);
File sourceFile = new File(sourceFilePath);
FileInputStream fis = new FileInputStream(sourceFile);
ZipArchiveEntry zipEntry = new ZipArchiveEntry(sourceFile, sourceFile.getName());
// Set encryption method and password
zipEntry.setMethod(ZipEntry.DEFLATED);
zipEntry.setGeneralPurposeBitFlags(ZipEntry.GPBF_ENCRYPTED_DATA);
zipEntry.setEncrypted(true);
zipEntry.setEncryptionMethod(ZipEntry.ENCRYPTION_AES_256);
zipOut.putArchiveEntry(zipEntry);
// Encrypt and write the content
byte[] buffer = new byte[1024];
int len;
while ((len = fis.read(buffer)) > 0) {
zipOut.write(buffer, 0, len);
}
zipOut.closeArchiveEntry();
zipOut.close();
fos.close();
fis.close();
System.out.println("ZIP encryption complete.");
}
}
同样地,请根据您的实际需求对代码进行适当的修改。
请注意,示例代码中的加密部分需要您根据加密算法和密码管理进行适当的修改和处理。这些示例只是为了演示基本的流程,实际实现可能需要更多的细节和安全性考虑。