BASE64 encryption and decryption and encryption parameters relative location of the problem and the json json

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This link: https://blog.csdn.net/qq_23145857/article/details/100030822

package com.tianjian.property.util;

import java.io.UnsupportedEncodingException;  
 
import sun.misc.*;  
 
public class Base64 {  
   // 加密  
   public static String getBase64(String str) {  
       byte[] b = null;  
       String s = null;  
       try {  
           b = str.getBytes("utf-8");  
       } catch (UnsupportedEncodingException e) {  
           e.printStackTrace();  
       }  
       if (b != null) {  
           s = new BASE64Encoder().encode(b);  
       }  
       return s;  
   }  
 
   // 解密  
   public static String getFromBase64(String s) {  
       byte[] b = null;  
       String result = null;  
       if (s != null) {  
           BASE64Decoder decoder = new BASE64Decoder();  
           try {  
               b = decoder.decodeBuffer(s);  
               result = new String(b, "utf-8");  
           } catch (Exception e) {  
               e.printStackTrace();  
           }  
       }  
       return result;  
   }  
   
   public static void main(String[] args){
      String asd= getBase64("asd");
      String res=getFromBase64(getBase64("asd"));
      System.out.println(asd+" 加密-解密 "+res);
   }
}  
 

json parameter, which parameter position is not the same, the encrypted result is different, because the location is not as likely to have null characters, null character is character.

eg.