使用java自带des加密算法实现文件加密和字符串加密
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2020-09-04
14:09:44
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使用使用java自带自带des加密算法实现文件加密和字符串加密加密算法实现文件加密和字符串加密
主要介绍了使用java自带des加密算法实现文件加密和字符串加密的示例,需要的朋友可以参考下
复制代码 代码如下:
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.security.SecureRandom;
import javax.crypto.Cipher;
import javax.crypto.CipherInputStream;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;
public class DesTool {
private static final String PASSKEY = "afasdf";
private static final String DESKEY = "asfsdfsdf";
/**
* @Comments ：对文件进行加密
* @param filePath 要加密的文件路径
* @param fileName 文件
* @param mode 加密模式 加密：Cipher.ENCRYPT_MODE 解密：Cipher.DECRYPT_MODE
* @return
*/
public static String encoderOrdecoder(String filePath, String fileName, int mode) {
InputStream is = null;
OutputStream out = null;
CipherInputStream cis = null;
try {
SecureRandom sr = new SecureRandom();
DESKeySpec dks = new DESKeySpec(DESKEY.getBytes());
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
SecretKey securekey = keyFactory.generateSecret(dks);
IvParameterSpec iv = new IvParameterSpec(PASSKEY.getBytes());
Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
cipher.init(mode, securekey, iv, sr);
File encoderFile = new File(filePath + File.separator + "encoder");
if (!encoderFile.exists()) {
encoderFile.mkdir();
}
is = new FileInputStream(filePath + File.separator + fileName);
out = new FileOutputStream(filePath + File.separator + "encoder"
+ File.separator + fileName);
cis = new CipherInputStream(is, cipher);
byte[] buffer = new byte[1024];
int r;
while ((r = cis.read(buffer)) > 0) {
out.write(buffer, 0, r);
}
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (is != null) {
is.close();
}
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