android:加密异常

Question

我正在制作一个应用程序，我必须在其中加密数据并将其发送到服务器，在这种情况下，当将数据转换为 int 形式时，我遇到数字格式异常。我的代码如下:

 public String encryptData(String key, String s)
    {
        try{
        System.out.println("encrypt");     
   //    byte[] utf8 = data.getBytes("UTF8");
         byte[] fin=s.getBytes();
         System.out.println("encrypt2");
     //   byte[] enc = ecipher.doFinal(fin);
         System.out.println("encrypt3");
        }catch (Exception e) {
            System.out.println(e);
        }
         System.out.println("1");
         int keyLen = key.length();
      //  int dataLen = Convert.ToInt16(data.length());
         System.out.println("2");
        Integer dataLen=Integer.parseInt(s);  // **This line is giving exception**
        System.out.println("3");
        char chData;
        char chKey;
        char[] data1 = s.toCharArray();
        char[] key1 = key.toCharArray();
        System.out.println("4");
        StringBuilder encryptedData = new StringBuilder();
        for (int i = 0; i < dataLen; i++)
        {
            chData = data1[i];
            for (int j = 0; j < keyLen; j++)
            {
                chKey = key1[j];
                chData = (char)(chData ^ chKey);
            }
            encryptedData.append(chData);
        }
       return (encryptedData.toString());
    }

我的 xml 是:

xml="<?xml version='1.0' encoding='utf-8'?>" + "<admin_auth_req><user_name>" +username+ "</user_name>" + "<password>" +PWOrd+ "</password></admin_auth_req>";

异常(exception)是:

java.lang.NumberFormatException: unable to parse '<?xml version='1.0' encoding='utf-8'?><admin_auth_req><user_name>newuser</user_name><password>tester</password></admin_auth_req>' as integer


                                 `

Answer 1

您正在尝试将不是数字表示形式的 String 值转换为 String。您真正应该做的是找到 String 的长度。所以改变这一行:

Integer dataLen=Integer.parseInt(s);

到:

int dataLen = s.length();