c# 加密解密和java 加密解密，相同结果

java 代码 ：

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;
 
import org.apache.commons.codec.binary.Base64;
/**
 *
 * @author Administrator
 *
 */
public class AES {
 
    // 加密
    public static String Encrypt(String sSrc, String sKey) throws Exception {
        if (sKey == null) {
            System.out.print("Key为空null");
            return null;
        }
        // 判断Key是否为16位
        if (sKey.length() != 16) {
            System.out.print("Key长度不是16位");
            return null;
        }
        byte[] raw = sKey.getBytes("utf-8");
        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/补码方式"
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));
 
        return new Base64().encodeToString(encrypted);//此处使用BASE64做转码功能，同时能起到2次加密的作用。
    }
 
    // 解密
    public static String Decrypt(String sSrc, String sKey) throws Exception {
        try {
            // 判断Key是否正确
            if (sKey == null) {
                System.out.print("Key为空null");
                return null;
            }
            // 判断Key是否为16位
            if (sKey.length() != 16) {
                System.out.print("Key长度不是16位");
                return null;
            }
            byte[] raw = sKey.getBytes("utf-8");
            SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, skeySpec);
            byte[] encrypted1 = new Base64().decode(sSrc);//先用base64解密
            try {
                byte[] original = cipher.doFinal(encrypted1);
                String originalString = new String(original,"utf-8");
                return originalString;
            } catch (Exception e) {
                System.out.println(e.toString());
                return null;
            }
        } catch (Exception ex) {
            System.out.println(ex.toString());
            return null;
        }
    }
 
    public static void main(String[] args) throws Exception {
        /*
         * 此处使用AES-128-ECB加密模式，key需要为16位。
         */
        String cKey = "1234567890123456";
        // 需要加密的字串
        String cSrc = "www.gowhere.so";
        System.out.println(cSrc);
        // 加密
        String enString = AES.Encrypt(cSrc, cKey);
        System.out.println("加密后的字串是：" + enString);
 
        // 解密
        String DeString = AES.Decrypt(enString, cKey);
        System.out.println("解密后的字串是：" + DeString);
    }
}

C# 代码

/// <summary>
       /// 有密码的AES加密 
       /// </summary>
       /// <param name="text">加密字符</param>
       /// <param name="password">加密的密码</param>
       /// <param name="iv">密钥</param>
       /// <returns></returns>
       public static string Encrypt(string toEncrypt,string key)
       {
           byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);
           byte[] toEncryptArray = UTF8Encoding.UTF8.GetBytes(toEncrypt);
 
           RijndaelManaged rDel = new RijndaelManaged();
           rDel.Key = keyArray;
           rDel.Mode = CipherMode.ECB;
           rDel.Padding = PaddingMode.PKCS7;
 
           ICryptoTransform cTransform = rDel.CreateEncryptor();
           byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
 
           return Convert.ToBase64String(resultArray, 0, resultArray.Length);
       }
 
       /// <summary>
       /// AES解密
       /// </summary>
       /// <param name="text"></param>
       /// <param name="password"></param>
       /// <param name="iv"></param>
       /// <returns></returns>
       public static string Decrypt(string toDecrypt,string key)
       {
           byte[] keyArray = UTF8Encoding.UTF8.GetBytes(key);
           byte[] toEncryptArray = Convert.FromBase64String(toDecrypt);
 
           RijndaelManaged rDel = new RijndaelManaged();
           rDel.Key = keyArray;
           rDel.Mode = CipherMode.ECB;
           rDel.Padding = PaddingMode.PKCS7;
 
           ICryptoTransform cTransform = rDel.CreateDecryptor();
           byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, 0, toEncryptArray.Length);
 
           return UTF8Encoding.UTF8.GetString(resultArray);
       }

另有一篇文章：

https://blog.csdn.net/softwave/article/details/53939824