AES加密Demo

aes对称加密，一个密码，加密解密全完成。加密没有长度限制
``

package com.autoyong.common.utils;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;

public class AESUtil {

private static final String defaultCKey = "hello@world";

/**
 * 使用默认字符进行加密
 *
 * @param msg
 * @return
 */
public static String EncryptByDefaultKey(String msg) {
    try {
        return Encrypt(msg, defaultCKey);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}


/**
 * 使用默认密码进行解密
 *
 * @param msg
 * @return
 */
public static String DecryptByDefaultKey(String msg) {
    try {
        return Decrypt(msg, defaultCKey);
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}


// 加密
public static String Encrypt(String sSrc, String sKey) throws Exception {
    if (sKey == null) {
        System.out.print("Key为空null");
        return null;
    }
    // 判断Key是否为16位
    if (sKey.length() != 16) {
        System.out.print("Key长度不是16位");
        return null;
    }
    byte[] raw = sKey.getBytes("utf-8");
    SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
    Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/补码方式"
    cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
    byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));
    String result = new BASE64Encoder().encode(encrypted);
    result = result.replaceAll("
|
", "");
    return result;//此处使用BASE64做转码功能，同时能起到2次加密的作用。
}

// 解密
public static String Decrypt(String sSrc, String sKey) throws Exception {
    try {
        // 判断Key是否正确
        if (sKey == null) {
            System.out.print("Key为空null");
            return null;
        }
        // 判断Key是否为16位
        if (sKey.length() != 16) {
            System.out.print("Key长度不是16位");
            return null;
        }
        byte[] raw = sKey.getBytes("utf-8");
        SecretKeySpec skeySpec = new SecretKeySpec(raw, "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec);
        byte[] encrypted1 = new BASE64Decoder().decodeBuffer(sSrc);//先用base64解密
        try {
            byte[] original = cipher.doFinal(encrypted1);
            String originalString = new String(original, "utf-8");
            return originalString;
        } catch (Exception e) {
            System.out.println(e.toString());
            return null;
        }
    } catch (Exception ex) {
        System.out.println(ex.toString());
        return null;
    }
}

public static void main(String[] args) throws Exception {
    /*
     * 此处使用AES-128-ECB加密模式，key需要为16位。
     */
    String cKey = "jkl;POIU1234++==";
    // 需要加密的字串

    String cSrc = "{"userId":"myUserId","orderId":"ORDER000001","amount":0,"num":10,"mobileNo":"13266668888","orderItemDtos":[{"productId":"000001","productCode":"productCode-001x","productName":"天马牌活塞","count":5,"price":10},{"productId":"000002","productCode":"productCode-002x","productName":"天马牌缸套","count":6,"price":10}]}";
    System.out.println(cSrc);
    // 加密
    String enString = AESUtil.EncryptByDefaultKey(cSrc);
    System.out.println("加密后的字串是：");
    System.out.println(enString);

    // 解密
    String DeString = AESUtil.DecryptByDefaultKey(enString);
    System.out.println("解密后的字串是：" + DeString);
}

}