JAVA AES文件加解密

AES加解密算法，代码如下：

/**

 * Created by hua on 2017/6/30.

 */

import javax.crypto.Cipher;

import javax.crypto.spec.IvParameterSpec;

import javax.crypto.spec.SecretKeySpec;

public class AESUtil1 {

    //初始化向量，aes 16位

    private static final String IV = "abcdefghijk1mnop";

    //二进制转变为16进制

    public static String parseByte2HexStr(byte[] buf) {

        StringBuffer sb = new StringBuffer();

        for (int i = ; i < buf.length; i++) {

            String hex = Integer.toHexString(buf[i] & 0xFF);

            if (hex.length() == ) {

                hex = '' + hex;

            }

            sb.append(hex);

        }

        return sb.toString();

    }

    //将16进制转变为二进制

    public static byte[] parseHexStr2Byte(String hexStr) {

        if (hexStr.length() < ) {

            return null;

        }

        byte[] result = new byte[hexStr.length() / ];

        for (int i = ; i < hexStr.length() / ; i++) {

            int high = Integer.parseInt(hexStr.substring(i * , i *  + ), );

            int low = Integer.parseInt(hexStr.substring(i *  + , i *  + ), );

            result[i] = (byte) (high *  + low);

        }

        return result;

    }

    //加密

    public static String encrypt(String content, String keyWord) throws Exception {

        try {

            SecretKeySpec key = new SecretKeySpec(keyWord.getBytes(), "AES");

            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

            cipher.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(IV.getBytes()));

            byte[] encryptedData = cipher.doFinal(content.getBytes("UTF-8"));

            return parseByte2HexStr(encryptedData);

        } catch (Exception e) {

            throw new Exception("加密失败");

        }

    }

    //解密

    public static String decrypt(String content, String keyWord) throws Exception {

        byte[] contentBytes = parseHexStr2Byte(content);

        try {

            SecretKeySpec key = new SecretKeySpec(keyWord.getBytes(), "AES");

            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");

            cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(IV.getBytes()));

            byte[] result = cipher.doFinal(contentBytes);

            return new String(result, "UTF-8");

        } catch (Exception e) {

            throw new Exception("解密失败");

        }

    }

    public static void main(String[] args) throws Exception {

        String content = "梅须逊雪三分白，雪却输梅一段香。";

        String password = "0123456789abcdef";   //此处使用AES-128-CBC加密模式，key需要为16位

        System.out.println("加密前：" + content);

        String encryptResult = AESUtil1.encrypt(content, password);

        System.out.println("加密后：" + encryptResult);

        String decryptResult = AESUtil1.decrypt(encryptResult,password);

        System.out.println("解密后：" + decryptResult);

    }

}

运行输出如下：

加密前：梅须逊雪三分白，雪却输梅一段香。

加密后：a5856355ef87955f0f112970495502ebe61b9bce4998bc777c9b383d608c1ba2da97f377914354d2e0d6500d1dac786aa69e593a67a17030389624223c5ee8fd

解密后：梅须逊雪三分白，雪却输梅一段香。