採用的演算法為AES演算法

1. 編寫加密工具類

package com.pibigstar.utils;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.spec.SecretKeySpec;
import org.apache.commons.codec.binary.Base64;

/**
 * 前後端資料傳輸加密工具類
 * @author pibigstar
 *
 */
public class AesEncryptUtils {
    //可配置到Constant中，並讀取配置檔案注入
 

    private static final String KEY = "abcdef0123456789";

    //引數分別代表 演算法名稱/加密模式/資料填充方式
    private static final String ALGORITHMSTR = "AES/ECB/PKCS5Padding";

    /**
     * 加密
     * @param content 加密的字串
     * @param encryptKey key值
     * @return
     * @throws Exception
     */
    public static String encrypt
 
(String content, String encryptKey) throws Exception {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(encryptKey.getBytes(), "AES"));
        byte
 
[] b = cipher.doFinal(content.getBytes("utf-8"));
        return Base64.encodeBase64String(b);
    }

    /**
     * 解密
     * @param encryptStr 解密的字串
     * @param decryptKey 解密的key值
     * @return
     * @throws Exception
     */
    public static String decrypt(String encryptStr, String decryptKey) throws Exception {
        KeyGenerator kgen = KeyGenerator.getInstance("AES");
        kgen.init(128);
        Cipher cipher = Cipher.getInstance(ALGORITHMSTR);
        cipher.init(Cipher.DECRYPT_MODE, new SecretKeySpec(decryptKey.getBytes(), "AES"));
        byte[] encryptBytes = Base64.decodeBase64(encryptStr);
        byte[] decryptBytes = cipher.doFinal(encryptBytes);
        return new String(decryptBytes);
    }

    public static String encrypt(String content) throws Exception {
        return encrypt(content, KEY);
    }
    public static String decrypt(String encryptStr) throws Exception {
        return decrypt(encryptStr, KEY);
    }


    public static void main(String[] args) throws Exception {
        String content = "派大星";
        System.out.println("加密前：" + content);

        String encrypt = encrypt(content, KEY);
        System.out.println("加密後：" + encrypt);

        String decrypt = decrypt(encrypt, KEY);
        System.out.println("解密後：" + decrypt);
    }
}

2. 前端

匯入 js 檔案

    <script type="text/javascript" src = "js/aes.js"></script>
    <script type="text/javascript" src = "js/pad-zeropadding.js"></script>
    <script type="text/javascript" src = "js/security.js"></script>

傳送資料

function sendData() {
        alert("傳送的資料："+Encrypt(JSON.stringify({name:"派大星"})));
        $.ajax({
            type: "POST",
            url:"/save",
            data:Encrypt(JSON.stringify({name:"派大星"})),
            dataType:'json',
            contentType: "application/json",
            success: function(resData) {
                alert("返回的資料："+resData);
                alert("解密之後："+Decrypt(resData));
                alert("解密之後轉json物件："+JSON.parse(Decrypt(resData)).name);
            }
        }); 
    }