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                AES加密解密 SHA1、SHA加密 MD5加密 二話不說馬上附上代碼: ~~~ package com.luo.util; import java.io.UnsupportedEncodingException; import java.security.InvalidKeyException; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; import java.security.SecureRandom; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.KeyGenerator; import javax.crypto.NoSuchPaddingException; import javax.crypto.SecretKey; import javax.crypto.spec.SecretKeySpec; public class DecriptUtil { /** * @author:羅國輝 * @date: 2015年12月17日 上午9:16:22 * @description: AES加密 * @parameter: str:待加密字符串,secretKeyBase:用于生成密鑰的基礎字符串 * @return: 加密字節數組 **/ public static byte[] encryptAES(String str, String secretKeyBase) { try { KeyGenerator kgen = KeyGenerator.getInstance("AES"); kgen.init(128, new SecureRandom(secretKeyBase.getBytes())); SecretKey secretKey = kgen.generateKey(); byte[] enCodeFormat = secretKey.getEncoded(); SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES"); Cipher cipher = Cipher.getInstance("AES");// 創建密碼器 byte[] byteContent = str.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; } /** * @author:羅國輝 * @date: 2015年12月17日 上午9:16:22 * @description: AES解密 * @parameter: strByteArray:待解密字節數組, * @parameter: secretKeyBase:用于生成密鑰的基礎字符串, 需要注意的是EAS是對稱加密,所以secretKeyBase在加密解密時要一樣的 * @return: 解密后字符串 **/ public static String decryptAES(byte[] strByteArray, String secretKeyBase) { try { KeyGenerator kgen = KeyGenerator.getInstance("AES"); kgen.init(128, new SecureRandom(secretKeyBase.getBytes())); SecretKey secretKey = kgen.generateKey(); byte[] enCodeFormat = secretKey.getEncoded(); SecretKeySpec key = new SecretKeySpec(enCodeFormat, "AES"); Cipher cipher = Cipher.getInstance("AES");// 創建密碼器 cipher.init(Cipher.DECRYPT_MODE, key);// 初始化 String result = new String(cipher.doFinal(strByteArray),"UTF-8"); 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(); } catch (UnsupportedEncodingException e) { e.printStackTrace(); } return null; } /** * @author:羅國輝 * @date: 2015年12月17日 上午9:24:43 * @description: SHA、SHA1加密 * @parameter: str:待加密字符串 * @return: 加密串 **/ public static String SHA1(String str) { try { MessageDigest digest = java.security.MessageDigest .getInstance("SHA-1"); //如果是SHA加密只需要將"SHA-1"改成"SHA"即可 digest.update(str.getBytes()); byte messageDigest[] = digest.digest(); // Create Hex String StringBuffer hexStr = new StringBuffer(); // 字節數組轉換為 十六進制 數 for (int i = 0; i < messageDigest.length; i++) { String shaHex = Integer.toHexString(messageDigest[i] & 0xFF); if (shaHex.length() < 2) { hexStr.append(0); } hexStr.append(shaHex); } return hexStr.toString(); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } return null; } /** * @author:羅國輝 * @date: 2015年12月17日 上午9:24:43 * @description: MD5加密 * @parameter: str:待加密字符串 * @return: 加密串 **/ public static String MD5(String str) { try { // 獲得MD5摘要算法的 MessageDigest 對象 MessageDigest mdInst = MessageDigest.getInstance("MD5"); // 使用指定的字節更新摘要 mdInst.update(str.getBytes()); // 獲得密文 byte[] md = mdInst.digest(); // 把密文轉換成十六進制的字符串形式 StringBuffer hexString = new StringBuffer(); // 字節數組轉換為 十六進制 數 for (int i = 0; i < md.length; i++) { String shaHex = Integer.toHexString(md[i] & 0xFF); if (shaHex.length() < 2) { hexString.append(0); } hexString.append(shaHex); } return hexString.toString(); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } return null; } } ~~~
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