java AES加密/解密算法 示例源码

【核心代码】

package com;

import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

/**
 * AES方式加解密算法
 * @author venus4A
 */
public class AES {

	/**
	 * 由服务端提供给调用者的一个用于数据加密的共享密钥
	 */
	private String _publicKey = null;
	/**
	 * 
	 * @param publicKey  AES密钥
	 */
	public AES() {
		String publicKey = "jKV4GEAwBtcyehND";
		_publicKey = publicKey;
	}
	
	public static final String KEY_ALGORITHM = "AES";
	public static final String CIPHER_ALGORITHM = "AES/CTR/PKCS5Padding";
	public static final String ivParameter = "1234567890abcdef";
	
	/**
	 * 解密
	 * @param data
	 * @return
	 */
	public String decrypt(String data) {
		try {
			SecretKeySpec skeySpec = new SecretKeySpec(_publicKey.getBytes("ASCII"), KEY_ALGORITHM);
			Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
			IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());			
			cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
			byte[] encrypted1 = new BASE64Decoder().decodeBuffer(data);			
			byte[] original = cipher.doFinal(encrypted1);
			String originalString = new String(original, "utf-8");
			return originalString;
		} catch (Exception ex) {
			ex.printStackTrace();
			return null;
		}
	}

	/**
	 * 加密
	 * @param data
	 * @return
	 */
	public String encrypt(String data) {
		try {
			IvParameterSpec iv = new IvParameterSpec(ivParameter.getBytes());
			SecretKeySpec sKeySpec = new SecretKeySpec(_publicKey.getBytes(), KEY_ALGORITHM);
			Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
			cipher.init(Cipher.ENCRYPT_MODE, sKeySpec, iv);
			byte[] encrypted = cipher.doFinal(data.getBytes("utf-8"));
			return new BASE64Encoder().encode(encrypted);
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}	
	}
	
	public static void main(String[] args) throws Exception {
		//举例
		String str = "王海平";
		AES aes = new AES();
		str = aes.encrypt(str);
		System.out.println("加密=" str);
		str = aes.decrypt(str);
		System.out.println("解密=" str);
	}
}