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雙向加密演算法aes 在Java 中的應用

package com.noahgroup.paas.cicd.rest.apollo.test;

import java.security.Key;
import java.security.SecureRandom;
import java.util.Base64;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;

public class AESUtils {
    
    
    
    //例項化金鑰
    private static Key key;
    
    //原始金鑰
    private static String KEY_STR = "my-springmvc-2017-11-07";
    
    //編碼
    private static String CHARSETNAME = "UTF-8";
    
    //金鑰演算法
    private static String KEY_ALGORITHM = "AES";
    
    //加密-解密演算法 / 工作模式 / 填充方式
    private static String CIPHER_ALGORITHM = "AES/ECB/PKCS5Padding";
    
    /**
     * 初始化key
     */
    static {
        try {
            KeyGenerator kgen = KeyGenerator.getInstance(KEY_ALGORITHM);
            SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
            random.setSeed(KEY_STR.getBytes());
            kgen.init(128, random);
            key = kgen.generateKey();
            kgen = null;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
    
    public static String getEncryptString(String str) {
        try {
            byte[] bytes = str.getBytes(CHARSETNAME);
            Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
            cipher.init(Cipher.ENCRYPT_MODE, key);
            byte[] doFinal = cipher.doFinal(bytes);
            return Base64.getEncoder().encodeToString(doFinal);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
 
    /**
     * @description: 對AES加密字串進行解密
     * @param str
     * @return
     */
    public static String getDecryptString(String str) {
        try {
            byte[] bytes = Base64.getDecoder().decode(str);
            Cipher cipher = Cipher.getInstance(CIPHER_ALGORITHM);
            cipher.init(Cipher.DECRYPT_MODE, key);
            byte[] doFinal = cipher.doFinal(bytes);
            return new String(doFinal, CHARSETNAME);
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}