JAVA AES文件加解密

/**
* 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 = 0; i < buf.length; i++) {
String hex = Integer.toHexString(buf[i] & 0xFF);
if (hex.length() == 1) {
hex = '0' + 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() < 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
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);
}
}

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。