js decoding, java encoding

A pseudocode example is as follows:

backend encoding

import org.apache.commons.codec.binary.Base64;

String content_base64 = Base64.encodeBase64String(contentsz);//Don't use Base64.encodeBase64URLSafeString(contentsz), it will kill me 

Front-end decoding

<script src="${pageContext.request.contextPath}/static/info/common/js/Base64.js" type="text/javascript" charset="utf-8"></script> -- need to import js file, remember.

var base = new Base64 ();  

var result = base.decode(column_value);  

 

 

Precautions:

If the content before encoding is inconsistent with the content after decoding, 

solution:

1. First compare the content of the back-end coding and the front-end coding, and then deal with the problem. 

 

Front-end, simple example of encryption and decryption:

//1. Encryption  

var str = '124 Chinese content';

var base = new Base64 ();  

var result = base.encode(str);  

console.log("column_value:" + result);  

//2. Decryption  

var result2 = base.decode(result);  

console.log("column_value:" + result2);

 

Backend, simple example of encryption and decryption:

//1, encryption

String content=form_column_value_i;

content=content.replaceAll("'", "");//此场景下输出的字符串是带有双引号的''，所以需要处理

byte contentsz[] = content.getBytes();

String content_base64 = Base64.encodeBase64String(contentsz);

System.out.println(content_base64);

//2、解密

String content_base64_string=form_column_name_value;

byte contentsz[] = Base64.decodeBase64(content_base64_string);

String content_base64 = new String(contentsz,"utf-8");

System.out.println(content_base64);