Java AES-128加解密demo

package com.zzfenglin.aes; import java.util.Formatter; import javax.crypto.Cipher; import javax.crypto.spec.SecretKeySpec; public class AesEntryDetry { // 加密秘钥 ，16个字节也就是128 bit private static final byte[] AES_KEY = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 }; // 需要加密的数据(保证16个字节，不够的自己填充) private static final byte[] SOURCE_BUF = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 }; // Java测试工程入口方法，在这个方法中调用加解密方法并打印结果 public static void main(String[] args) throws Exception { // 需要加密的原始数据转化成字符串并打印到控制台 String strSource = BytetohexString(SOURCE_BUF); System.out.println("source:\n" + strSource); // 调用加密方法，对数据进行加密，加密后的数据存放到encryBuf字节数组中 byte[] encryBuf = encrypt(AES_KEY, SOURCE_BUF); // 将加密后的字节数组数据转成字符串并打印到控制台 String strEncry = BytetohexString(encryBuf).toLowerCase(); System.out.println("encrypte:\n" + strEncry); // 调用解密方法，对数据进行解密，解密后的数据存放到decryBuf字节数组中 byte[] decryBuf = decrypt(AES_KEY, encryBuf); // 将解密后的字节数组数据转成字符串并打印到控制台 String strDecry = BytetohexString(decryBuf); System.out.println("decrypte:\n" + strDecry); } // 加密方法 private static byte[] encrypt(byte[] key, byte[] clear) throws Exception { SecretKeySpec skeySpec = new SecretKeySpec(key, "AES"); Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding"); cipher.init(Cipher.ENCRYPT_MODE, skeySpec); byte[] encrypted = cipher.doFinal(clear); return encrypted; } // 解密方法 private static byte[] decrypt(byte[] key, byte[] encrypted) throws Exception { SecretKeySpec skeySpec = new SecretKeySpec(key, "AES"); Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding"); cipher.init(Cipher.DECRYPT_MODE, skeySpec); byte[] decrypted = cipher.doFinal(encrypted); return decrypted; } // 字节数组按照一定格式转换拼装成字符串用于打印显示 private static String BytetohexString(byte[] b) { int len = b.length; StringBuilder sb = new StringBuilder(b.length * (2 + 1)); Formatter formatter = new Formatter(sb); for (int i = 0; i < len; i++) { if (i < len - 1) formatter.format("0x%02X:", b[i]); else formatter.format("0x%02X", b[i]); } formatter.close(); return sb.toString(); } }