Java implementation AES mode encryption

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 that in order to be able to work with  iOS  unified          //  here  key  can not use  keygenerator, SecureRandom, secretkey  generation          byte[] encodeformat = key.getbytes (encoding);         secretkeyspec secrEtkeyspec = new secretkeyspec (encodeformat,  "AES");         byte[] initparam = iv_string.getbytes (encoding);         ivparameterspec ivparameterspec = new ivparameterspec (InitParam);         //  specify cryptographic algorithms, work modes, and fill methods          cipher cipher = cipher.getinstance ("aes/cbc/pkcs5padding");         cipher.init (Cipher.encrypt_mode, secretkeyspec, ivparameterspec);         byte[] encryptedbytes = cipher.dofinal (byteContent);         //  also  base64  encode the encrypted data          string base64 = new base64 (). encodetostring (encryptedBytes);         //URL encoding   removing = ? &        return  Urlencoder.encode (base64,encoding);    }    public static  String decryptaes (String content, string key)              throws InvalidKeyException, NoSuchAlgorithmException,             NoSuchPaddingException,  invalidalgorithmparameterexception,             illegalblocksizeexception, badpaddingexception, ioexception {         //url decoding         content = urldecoder.decode (content,encoding);        // base64  decoding          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 ("After decryption:"  +  decrypt);     }}

Java implementation AES mode encryption