Implementation of AES encryption by java

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;import org.apache.commons.codec.binary.Base64;import com.alibaba.fastjson.JSON;import com.alibaba.fastjson.JSONObject;import java.io.IOException;import java.io.UnsupportedEncodingException;import java.net.URLDecoder;import java.net.URLEncoder;import java.security.InvalidAlgorithmParameterException;import java.security.InvalidKeyException;import java.security.NoSuchAlgorithmException Public class AESUtil {private static final String IV_STRING = "sdf4ddfsFD86Vdf2"; private static final String encoding = "UTF-8"; public static String encryptAES (String content, String key) throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, UnsupportedEncodingException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException {byte [] byteContent = content.getBytes (encoding) / / Note: in order to be unified with iOS, KeyGenerator, SecureRandom and SecretKey cannot be used to generate byte [] enCodeFormat = key.getBytes (encoding); SecretKeySpec secretKeySpec = new SecretKeySpec (enCodeFormat, "AES"); byte [] initParam = IV_STRING.getBytes (encoding); IvParameterSpec ivParameterSpec = new IvParameterSpec (initParam) / / specify the encryption algorithm, working mode and filling mode Cipher cipher = Cipher.getInstance ("AES/CBC/PKCS5Padding"); cipher.init (Cipher.ENCRYPT_MODE, secretKeySpec, ivParameterSpec); byte [] encryptedBytes = cipher.doFinal (byteContent); / / also base64 encode encrypted data String base64 = new Base64 () .encodeToString (encryptedBytes) / perform url encoding and remove =? & return URLEncoder.encode (base64,encoding);} public static String decryptAES (String content, String key) throws InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidAlgorithmParameterException, IllegalBlockSizeException, BadPaddingException, IOException {/ / URL decode content = URLDecoder.decode (content,encoding); / / base64 decode byte [] encryptedBytes = Base64.decodeBase64 (content) Byte [] enCodeFormat = key.getBytes (encoding); SecretKeySpec secretKey = new SecretKeySpec (enCodeFormat, "AES"); byte [] initParam = IV_STRING.getBytes (encoding); IvParameterSpec ivParameterSpec = new IvParameterSpec (initParam); Cipher cipher = Cipher.getInstance ("AES/CBC/PKCS5Padding"); cipher.init (Cipher.DECRYPT_MODE, secretKey, ivParameterSpec); byte [] result = cipher.doFinal (encryptedBytes) Return new String (result, encoding);} public static void main (String [] args) throws Exception {JSONObject json = new JSONObject (); json.put ("custNum", "111111"); / * json.put ("name", "Zhang San"); json.put ("cityCode", "100001"); json.put ("cityName", "Beijing"); json.put ("mobileNo", "15651876590") * / String content = json.toJSONString (); System.out.println ("before encryption: + content); String key =" djadiKJdj49dFJLd "; System.out.println (" encryption key and decryption key: "+ key); String encrypt = encryptAES (content, key); System.out.println (" after encryption: "+ encrypt); String decrypt = decryptAES (encrypt, key) System.out.println ("decrypted:" + decrypt);}}