java aes 加密解密算法_JAVA AES对称加密解密算法

小咪咪 2022-11-12 02:34 378阅读 0赞

package com.ourangel.box.mvc.controller.test;

import javax.crypto.\*;

import javax.crypto.spec.SecretKeySpec;

import java.io.UnsupportedEncodingException;

import java.security.InvalidKeyException;

import java.security.NoSuchAlgorithmException;

import java.security.SecureRandom;

public class testController \{

/\*\*

\* 加密

\* @param content 需要加密的内容

\* @param password 加密密码

\* @return

\*/

public static byte\[\] encrypt(String content, String password) \{

try \{

KeyGenerator kgen = KeyGenerator.getInstance("AES");

kgen.init(128, new SecureRandom(password.getBytes()));

SecretKey secretKey = kgen.generateKey();

byte\[\] enCodeFormat = secretKey.getEncoded();

SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");

Cipher cipher = Cipher.getInstance("AES");// 创建密码器

byte\[\] byteContent = content.getBytes("utf-8");

cipher.init(Cipher.ENCRYPT\_MODE, key);// 初始化

byte\[\] result = cipher.doFinal(byteContent);

return result; // 加密

\} catch (NoSuchAlgorithmException e) \{

e.printStackTrace();

\} catch (NoSuchPaddingException e) \{

e.printStackTrace();

\} catch (InvalidKeyException e) \{

e.printStackTrace();

\} catch (UnsupportedEncodingException e) \{

e.printStackTrace();

\} catch (IllegalBlockSizeException e) \{

e.printStackTrace();

\} catch (BadPaddingException e) \{

e.printStackTrace();

return null;

/\*\*

\* 解密

\* @param content 待解密内容

\* @param password 解密密钥

\* @return

\*/

public static byte\[\] decrypt(byte\[\] content, String password) \{

try \{

KeyGenerator kgen = KeyGenerator.getInstance("AES");

kgen.init(128, new SecureRandom(password.getBytes()));

SecretKey secretKey = kgen.generateKey();

byte\[\] enCodeFormat = secretKey.getEncoded();

SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES");

Cipher cipher = Cipher.getInstance("AES");// 创建密码器

cipher.init(Cipher.DECRYPT\_MODE, key);// 初始化

byte\[\] result = cipher.doFinal(content);

return result; // 加密

\} catch (NoSuchAlgorithmException e) \{

e.printStackTrace();

\} catch (NoSuchPaddingException e) \{

e.printStackTrace();

\} catch (InvalidKeyException e) \{

e.printStackTrace();

\} catch (IllegalBlockSizeException e) \{

e.printStackTrace();

\} catch (BadPaddingException e) \{

e.printStackTrace();

return null;

/\*\*将二进制转换成16进制

\* @param buf

\* @return

\*/

public static String parseByte2HexStr(byte buf\[\]) \{

StringBuffer sb = new StringBuffer();

for (int i = 0; i < buf.length; i++) \{

String hex = Integer.toHexString(buf\[i\] & 0xFF);

if (hex.length() == 1) \{

hex = '0' + hex;

sb.append(hex.toUpperCase());

return sb.toString();

/\*\*将16进制转换为二进制

\* @param hexStr

\* @return

\*/

public static byte\[\] parseHexStr2Byte(String hexStr) \{

if (hexStr.length() < 1)

return null;

byte\[\] result = new byte\[hexStr.length()/2\];

for (int i = 0;i< hexStr.length()/2; i++) \{

int high = Integer.parseInt(hexStr.substring(i\*2, i\*2+1), 16);

int low = Integer.parseInt(hexStr.substring(i\*2+1, i\*2+2), 16);

result\[i\] = (byte) (high \* 16 + low);

return result;

public static void main(String args\[\]) \{

String content = "你大爷的";

String password = "12345678";

//加密

System.out.println("加密前：" + content);

byte\[\] encryptResult = encrypt(content, password);

String encryptResultStr = parseByte2HexStr(encryptResult);

System.out.println("加密后：" + encryptResultStr);

//解密

byte\[\] decryptFrom = parseHexStr2Byte(encryptResultStr);

byte\[\] decryptResult = decrypt(decryptFrom,password);

System.out.println("解密后：" + new String(decryptResult));

java aes 加密解密算法_JAVA AES对称加密解密算法

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