JAVA中使用AES加密

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/*待加密的数据*/byte[] data = "ABCDEFGHIJKLMNOP".getBytes(Charset.defaultCharset());/*用来存储加密后的数据*/byte[] encryptDate = new byte[data.length];/*密钥*/byte[] key = "1234567890123456".getBytes(Charset.defaultCharset());/*初始向量IV*/byte[] iv = "1234567890123456".getBytes(Charset.defaultCharset());

1.首先是创建一个加密器Cipher：

Cipher encoder = Cipher.getInstance("AES/CBC/NoPadding");

2.创建一个SecretKeySpec密钥对象：

SecretKeySpec keySpec = new SecretKeySpec(key, "AES");

3.创建初始向量IV（CBC模式）：

IvParameterSpec ivParam = new IvParameterSpec(iv);

4.初始化加密器：

encoder.init(Cipher.ENCRYPT_MODE, keySpec, ivParam);

5.执行加密：

encryptData = encoder.doFinal(data);

完整代码：

import java.nio.charset.Charset;import java.security.InvalidAlgorithmParameterException;import java.security.InvalidKeyException;import java.security.NoSuchAlgorithmException;import java.util.Arrays;import javax.crypto.BadPaddingException;import javax.crypto.Cipher;import javax.crypto.IllegalBlockSizeException;import javax.crypto.NoSuchPaddingException;import javax.crypto.spec.IvParameterSpec;import javax.crypto.spec.SecretKeySpec;public class AES {    /**     * @param args the command line arguments     */    public static void main(String[] args) {        byte[] data = "ABCDEFGHIJKLMNOP".getBytes(Charset.defaultCharset());        byte[] encryptData = new byte[data.length];        byte[] key = "1234567890123456".getBytes(Charset.defaultCharset());        byte[] iv = "1234567890123456".getBytes(Charset.defaultCharset());        SecretKeySpec keySpec = new SecretKeySpec(key, "AES");        IvParameterSpec ivParam = new IvParameterSpec(iv);        try{            Cipher encoder = Cipher.getInstance("AES/CBC/NoPadding");            encoder.init(Cipher.ENCRYPT_MODE,keySpec,ivParam);            encryptData = encoder.doFinal(data);        }catch(NoSuchAlgorithmException | NoSuchPaddingException | InvalidKeyException | InvalidAlgorithmParameterException | IllegalBlockSizeException | BadPaddingException e){            /*do something*/        }     }}

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