AES加密demo

需要引入的jar包：


<!-- aes加密 base64 -->
  <dependency>
   <groupId>org.apache.axis</groupId>
   <artifactId>axis</artifactId>
   <version>1.4</version>
  </dependency>

package cn.iautos.mall.utils;

import java.io.UnsupportedEncodingException;
import java.security.InvalidKeyException;
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;

import org.apache.axis.encoding.Base64;

import cn.iautos.mall.common.Constant;

/**
* aes加密算法
*
* @author xuzhenmin
* @version 2014-3-30 下午2:27:01
*/
public class AESUtil {

/**
* 加密
*
* @param content
*            需要加密的内容
* @param password
*            加密密码
* @return
*/
private 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
*/
private 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
*/
private 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
*/
private 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;
}

/**
* 加密
*
* @param content
*            需要加密的内容
* @param password
*            加密密码
* @return
*/
private static byte[] encrypt2(String content, String password) {
  try {
   SecretKeySpec key = new SecretKeySpec(password.getBytes(), "AES");
   Cipher cipher = Cipher.getInstance("AES/ECB/NoPadding");
   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;
}

public static String getEncodeMsg(String msg) {
  byte[] encryptResult = encrypt(msg, Constant.MALL_SECURITY_AES_KEY);
//  return new String(Base64.encode(encryptResult));
  return parseByte2HexStr(encryptResult);

}

public static String getDecodeMsg(String msg) {

  byte[] decryptResult = decrypt(parseHexStr2Byte(msg),
    Constant.MALL_SECURITY_AES_KEY);
  return new String(decryptResult);
}

// public static void main(String[] args) {
//  String content = "test";
//  String msg = getEncodeMsg(content);
//  System.out.println("加密后：" + msg);
//  // 解密
//  System.out.println("解密后：" + getDecodeMsg(msg));
// }

}