pom.xml先引入依赖:
<dependency>
<groupId>org.bouncycastle</groupId>
<artifactId>bcprov-jdk15on</artifactId>
<version>1.60</version>
</dependency>
import org.apache.commons.net.util.Base64;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.crypto.Cipher;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;
/**
* @Auther:
* @Date: 2018/10/19 15:49
* @Description:
*/
public class AESUtil {
static Logger logger = LoggerFactory.getLogger(AESUtil.class);
// 密钥
public static String key = "AD42F6697B035B7580E4FEF93BE20BAD";
private static String charset = "utf-8";
// 偏移量
private static int offset = 16;
// 加密器类型:加密算法为AES,加密模式为CBC,补码方式为PKCS5Padding
private static String transformation = "AES/CBC/PKCS5Padding";
// 算法类型:用于指定生成AES的密钥
private static String algorithm = "AES";
/**
* 加密
*
* @param content
* @return
*/
public static String encrypt(String content) {
return encrypt(content, key);
}
/**
* 解密
*
* @param content
* @return
*/
public static String decrypt(String content) {
return decrypt(content, key);
}
/**
* 加密
*
* @param content 需要加密的内容
* @param key 加密密码
* @return
*/
public static String encrypt(String content, String key) {
try {
//构造密钥
SecretKeySpec skey = new SecretKeySpec(key.getBytes(), algorithm);
//创建初始向量iv用于指定密钥偏移量(可自行指定但必须为128位),因为AES是分组加密,下一组的iv就用上一组加密的密文来充当
IvParameterSpec iv = new IvParameterSpec(key.getBytes(), 0, offset);
//创建AES加密器
Cipher cipher = Cipher.getInstance(transformation);
byte[] byteContent = content.getBytes(charset);
//使用加密器的加密模式
cipher.init(Cipher.ENCRYPT_MODE, skey, iv);
// 加密
byte[] result = cipher.doFinal(byteContent);
//使用BASE64对加密后的二进制数组进行编码
return new Base64().encodeToString(result);
} catch (Exception e) {
logger.info("", e);
}
return null;
}
/**
* AES(256)解密
*
* @param content 待解密内容
* @param key 解密密钥
* @return 解密之后
* @throws Exception
*/
public static String decrypt(String content, String key) {
try {
SecretKeySpec skey = new SecretKeySpec(key.getBytes(), algorithm);
IvParameterSpec iv = new IvParameterSpec(key.getBytes(), 0, offset);
Cipher cipher = Cipher.getInstance(transformation);
//解密时使用加密器的解密模式
cipher.init(Cipher.DECRYPT_MODE, skey, iv);// 初始化
byte[] result = cipher.doFinal(new Base64().decode(content));
return new String(result); // 解密
} catch (Exception e) {
logger.info("", e);
}
return null;
}
public static void main(String[] args) {
String s = "hello World!123.加解密";
String encryptResultStr = encrypt(s);
// 加密
System.out.println("加密前:" + s);
System.out.println("加密后:" + encryptResultStr);
// 解密
System.out.println("解密后:" + decrypt(encryptResultStr));
}
}