AES加解密（java）

package test;

import java.security.SecureRandom;
import java.security.Security;
import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

/*实例化支持DES算法的密钥生成器(算法名称命名需按规定，否则抛出异常) 
 * KeyGenerator 提供对称密钥生成器的功能，支持各种算法
 * KeyGenerator keygen =KeyGenerator.getInstance("AES"); 
 * 【1】生成随机；二选一
 * keygen.init(128); 
 * 【2】根据口令生成；二选一
 * keygen.init(128, new SecureRandom(password.getBytes()));  
 * 生成密钥 
 * SecretKey deskey =keygen.generateKey(); 
 * 保存为byte数组
 * byte[] key=deskey.getEncoded();
 */

/*将数组转换成密钥
 * byte[] key ={ 117, -1, -107, -53, 125, -94, -67, 102, 55, 66, -90, 81, -70, -96, -95,-83 };
 * SecretKey deskey = new SecretKeySpec(key, "AES");
 */

public class EncrypAES
{
	private static byte[] StrKey2ByteArrayKey(String key) throws Exception
	{
		KeyGenerator kgen = KeyGenerator.getInstance("AES");
		kgen.init(128, new SecureRandom(key.getBytes()));
		kgen.init(128, new SecureRandom(key.getBytes()));
		SecretKey secretKey = kgen.generateKey();
		byte[] enCodeFormat = secretKey.getEncoded();
		//String  s=new String(secretKey.getEncoded(),"UTF-8");
		//System.out.println(s);
		return enCodeFormat;
	}
	/**
	 * Encrytor<对字符串加密>
	 * 
	 * @param param
	 *          src<要加密的byte数组，二进制>
	 * @param key
	 *          
	 * 
	 * @return byteArray<二进制>
	 */
	public static byte[] Encrytor(byte src[], byte[] key)
			throws Exception
	{
		// SecretKey 负责保存对称密钥
		SecretKey deskey = new SecretKeySpec(key, "AES");
		// Cipher负责完成加密或解密工作，生成Cipher对象,指定其支持的AES,DES算法
		Cipher c = Cipher.getInstance("AES");
		Security.addProvider(new com.sun.crypto.provider.SunJCE());
		// 根据密钥，对Cipher对象进行初始化，ENCRYPT_MODE表示加密模式
		c.init(Cipher.ENCRYPT_MODE, deskey);
		// 该字节数组负责保存加密的结果， 加密，结果保存进cipherByte
		byte[] cipherByte = c.doFinal(src);
		return cipherByte;
	}

	private static byte[] Encrytor(byte[] src, String key) throws Exception
	{
		byte[] enCodeFormat = StrKey2ByteArrayKey(key);
		return Encrytor(src, enCodeFormat);
	}

	public static String Encrytor(String str, String key)
			throws Exception
	{
		byte[] src = str.getBytes("utf-8");
		return Str.ByteArray2HexStr(Encrytor(src, key));
	}
	/**
	 * Encrytor<对字符串加密>
	 * 
	 * @param param
	 *          str<要加密的字符串>
	 * @param key
	 *          
	 * 
	 * @return String
	 */
	public static String Encrytor(String str, byte[] key)
			throws Exception
	{
		byte[] src = str.getBytes("utf-8");
		return Str.ByteArray2HexStr(Encrytor(src, key));
	}

	/**
	 * Decryptor<对字符串解密>
	 * 
	 * @param enstr
	 *          <要解密的字符串Hexstr>
	 * @param key
	 *          
	 * 
	 * @return String
	 */
	public static byte[] Decryptor(byte[] enstr, byte[] key)
			throws Exception
	{
		// SecretKey 负责保存对称密钥
		SecretKey deskey = new SecretKeySpec(key, "AES");
		// Cipher负责完成加密或解密工作,生成Cipher对象,指定其支持的AES,DES算法
		Cipher c = Cipher.getInstance("AES");
		Security.addProvider(new com.sun.crypto.provider.SunJCE());
		// 根据密钥，对Cipher对象进行初始化，DECRYPT_MODE表示解密模式
		c.init(Cipher.DECRYPT_MODE, deskey);
		// 该字节数组负责保存加密的结果
		byte[] cipherByte = c.doFinal(enstr);
		return cipherByte;
	}

	private static byte[] Decryptor(byte[] src, String key) throws Exception
	{
		byte[] enCodeFormat = StrKey2ByteArrayKey(key);
		return Decryptor(src, enCodeFormat);
	}
	
	public static String Decryptor(String enstr, String key)
			throws Exception
	{
		byte[] buff = Str.HexStr2ByteArray(enstr);
		return new String(Decryptor(buff, key), "utf-8");
	}
	/**
	 * Decryptor<对字符串解密>
	 * 
	 * @param enstr
	 *          <要解密的字符串Hexstr>
	 * @param key
	 *          
	 * 
	 * @return String
	 */
	public static String Decryptor(String enstr, byte[] key)
			throws Exception
	{
		byte[] buff = Str.HexStr2ByteArray(enstr);
		Decryptor(buff, key);
		return new String(Decryptor(buff, key), "utf-8");
	}

	// 

	/**
	 * main
	 */
	public static void main(String[] args) throws Exception
	{
		String msg = "12345678";
		
		System.out.println("字符数组密钥-----------------------------");
		byte[] key={107, -76, -125, 126, -73, 67, 41, 16, 94, -28, 86, -115, -38, 125, -58, 126};
		String encontent = EncrypAES.Encrytor(msg, key);
		String decontent = EncrypAES.Decryptor(encontent, key);
		System.out.println("明文是:" + msg);
		System.out.println("加密后:" + encontent);
		System.out.println("解密后:" + decontent);
		
		System.out.println("字符串密钥-----------------------------");
		String keys="123456";
		encontent = EncrypAES.Encrytor(msg, keys);
		decontent = EncrypAES.Decryptor(encontent, keys);
		System.out.println("明文是:" + msg);
		System.out.println("加密后:" + encontent);
		System.out.println("解密后:" + decontent);
	}

}

其中使用的工具类Str见《String工具类（java）》