AES加密

Base64工具类

package test.test;

import org.apache.commons.codec.binary.Base64;

/**
 * Base64工具类
 * @author zhouky
 * 2016年9月29日下午2:36:00
 */
public class Base64Util {

	/**
	 * 加密
	 * @param bytes
	 * @return
	 */
	public static String encrypt(byte[] bytes) {
		byte[] arr = Base64.encodeBase64(bytes, true);
		if(null == arr)
			try {
				throw new Exception();
			} catch (Exception e) {
				e.printStackTrace();
			}
		return new String(arr);
	}


	/**
	 * 解密
	 * @param encryptString
	 * @return
	 */
	public static byte[] decrypt(String encryptString) {
		byte[] arr = Base64.decodeBase64(encryptString.getBytes());
		if(null == arr)
			try {
				throw new Exception();
			} catch (Exception e) {
				e.printStackTrace();
			}
		return arr;
	}
}

AES加解密

 

package test.test;

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

import org.apache.log4j.Logger;

/**
 * AES加密工具类
 * @author zhouky
 * 2016年9月29日下午2:29:35
 */
@SuppressWarnings("static-access")
public class AES {

	protected static Logger logger = Logger.getLogger(AES.class);
	
	/**
	 * 密钥算法 java6支持56位密钥，bouncycastle支持64位
	 * */
	public static final String KEY_ALGORITHM = "AES";

	/**
	 * 加密/解密算法/工作模式/填充方式
	 * JAVA6 支持PKCS5PADDING填充方式 Bouncy castle支持PKCS7Padding填充方式
	 * */
	public static final String CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";

	public static final String SECRET_KEY = "1234567890123456";
	
	private static AES instance = null;

    private AES() {

    }
	
	public static AES getInstance() {
        if (instance == null)
            instance = new AES();
        return instance;
    }
	
	/**
     * 加密
     * @param content 需要加密的内容
     * @param password  加密密码
     * @return
	 * @throws Exception 
     */
	public static byte[] encrypt(String content,String secretKey){
		try {
			SecretKeySpec key = new SecretKeySpec(secretKey.getBytes(), KEY_ALGORITHM);
			Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);// 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 (Exception e) {
			logger.error("[AES加密 error]="+e.getMessage());
			return null;
		}
	}
	
	/**
	 * AES加密后用Base64进行二次加密
	 * @param str
	 * @return
	 * @throws Exception 
	 */
	public static String encrypt16(String str,String key){
		byte[] data; // 加密数据
		try {
			data = encrypt(str,key);
			return parseByte2HexStr(data);
		} catch (Exception e) {
			logger.debug("[AES密文转16进制 error] ="+e.getMessage());
			return null;
		}
	}
	
	/**
	 * AES加密后用Base64进行二次加密
	 * @param str
	 * @return
	 * @throws Exception 
	 */
	public static String encryptBase64(String str,String key){
		byte[] data; // 加密数据
		try {
			data = encrypt(str,key);
			return Base64Util.encrypt(data).trim();
		} catch (Exception e) {
			logger.debug("[Base64加密 AES密文 error] ="+e.getMessage());
			return null;
		}
	}
    
    /**解密
     * @param content  待解密内容
     * @return
     * @throws Exception 
     */
	public static byte[] decrypt(byte[] content,String secretKey){
		try {
			SecretKeySpec key = new SecretKeySpec(secretKey.getBytes(), KEY_ALGORITHM);
			Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);// 创建密码器
			cipher.init(Cipher.DECRYPT_MODE, key);// 初始化
			byte[] result = cipher.doFinal(content);
			return result; 
		} catch (Exception e) {
			logger.error("[AES解密 error ]=" +e.getMessage());
			return null;
		}
	}
	
	/**
	 *  解密数据
	 * @param value：base加密后的数据
	 * @return
	 * @throws Exception 
	 */
	public static String decrypt16(String value,String secretKey){
		byte[] hex2Data; 
		byte[] aes128Data; 
		try {
			hex2Data = parseHexStr2Byte(value);
			aes128Data = decrypt(hex2Data,secretKey);
			return new String(aes128Data);
		} catch (Exception e) {
			logger.error("[十六进制转换 AES密文 error] ="+e.getMessage());
			return null;
		}
	}
	
	/**
	 *  解密数据
	 * @param value：base加密后的数据
	 * @return
	 * @throws Exception 
	 */
	public static String decryptBase64(String value,String secretKey){
		byte[] base64Data; // base64解密数据
		byte[] aes256Data; // base64解密数据
		try {
			base64Data = Base64Util.decrypt(value);//base64解密 base64数据
			aes256Data = decrypt(base64Data,secretKey);
			return new String(aes256Data);
		} catch (Exception e) {
			logger.error("[Base64解密 AES密文 error] ="+e.getMessage());
			return null;
		}
	}
	
	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();
    }

    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;
    }
	
	public static void main(String[] args) {
		System.out.println(AES.getInstance().encrypt("15152200001", SECRET_KEY));
		System.out.println(AES.getInstance().decrypt(AES.getInstance().encrypt("15152200001", SECRET_KEY), SECRET_KEY));
		System.out.println(AES.getInstance().encrypt16("15152200001", SECRET_KEY));
		System.out.println(AES.getInstance().decrypt16(AES.getInstance().encrypt16("15152200001", SECRET_KEY), SECRET_KEY));
		System.out.println(AES.getInstance().encryptBase64("15152200001", SECRET_KEY));
		System.out.println(AES.getInstance().decryptBase64(AES.getInstance().encryptBase64("15152200001", SECRET_KEY), SECRET_KEY));
	}
}

Jar包依赖

　　<dependency>
　　　　<groupId>log4j</groupId>
　　　　<artifactId>log4j</artifactId>
　　　　<version>${log4j_version}</version>
　　</dependency>
　　<dependency>
　　　　<groupId>commons-codec</groupId>
　　　　<artifactId>commons-codec</artifactId>
　　　　<version>${commons-codec_version}</version>
　　</dependency>