【安全性】java数据加密解密aes

java数据加密解密aes

1.AESUtil.java

package pers.li;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.security.InvalidAlgorithmParameterException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;

import javax.crypto.BadPaddingException;
import javax.crypto.Cipher;
import javax.crypto.IllegalBlockSizeException;
import javax.crypto.NoSuchPaddingException;
import javax.crypto.spec.IvParameterSpec;
import javax.crypto.spec.SecretKeySpec;

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

/**
 * 调用方法参见main方法，需要事先指定偏移量 iv和密钥参数，这种方法密钥必须是16位的<br>
 * 公开的密钥和偏移量都是16位的
 */
public class AESUtil {

  public static  String key = "1233333333333333";
  public static  String iv  = "3333333333333333";

  /**
   * 偏移量获取
   * @return
   * @throws UnsupportedEncodingException
   */
  private static IvParameterSpec getIV() throws UnsupportedEncodingException {
    return new IvParameterSpec(iv.getBytes());
  }

  /**
   * 密钥生成
   * @return
   * @throws UnsupportedEncodingException
   * @throws NoSuchAlgorithmException
   */
  public static SecretKeySpec getKey()   {
    SecretKeySpec keySpec = new SecretKeySpec(key.getBytes(), "AES");
    return keySpec;
  }

  /**
   * 解密
   * @return
   */
  public static String decrypt(String src) {
    try {

      Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
      cipher.init(Cipher.DECRYPT_MODE, getKey(), getIV());
      byte[] decodedByte = new BASE64Decoder().decodeBuffer(src);
      byte[] original = cipher.doFinal(decodedByte);
      String result = new String(original);
      return result;
    } catch(IOException e){
      System.out.println(e.toString());
    } catch (IllegalBlockSizeException e) {
      System.out.println(e.toString());
    } catch (BadPaddingException e) {
      System.out.println(e.toString());
    } catch (InvalidKeyException e) {
      System.out.println(e.toString());
    } catch (InvalidAlgorithmParameterException e) {
      System.out.println(e.toString());
    } catch (NoSuchAlgorithmException e) {
      System.out.println(e.toString());
    } catch (NoSuchPaddingException e) {
      System.out.println(e.toString());
    };

    return null;
  }

  /**
   * 加密
   * 
   * @param content
   * @return
   */
  public static String encrypt(String content) {

    try {

      Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
      cipher.init(Cipher.ENCRYPT_MODE, getKey(), getIV());
      byte[] contentByte = content.getBytes();
      byte[] result = cipher.doFinal(contentByte);
      return new BASE64Encoder().encode(result);
    } catch (IllegalBlockSizeException e) {
      System.out.println(e.toString());
    } catch (BadPaddingException e) {
      System.out.println(e.toString());
    } catch (InvalidKeyException e) {
      System.out.println(e.toString());
    } catch (InvalidAlgorithmParameterException e) {
      System.out.println(e.toString());
    } catch (UnsupportedEncodingException e) {
      System.out.println(e.toString());
    } catch (NoSuchAlgorithmException e) {
      System.out.println(e.toString());
    } catch (NoSuchPaddingException e) {
      System.out.println(e.toString());
    };

    return null;
  }




  /**
   * 调用的测试主方法
   * @param args
   * @throws UnsupportedEncodingException
   */
  public static void main(String[] args) throws UnsupportedEncodingException {
    String content = "orderId=10dkfadsfksdkssdkd&amount=80&orderTime=200605093&name='啪啪啪'";

//    AESUtil.iv=ISchoolConstants.AES_IV;
//    AESUtil.key=ISchoolConstants.AES_KEY;
    // 加密
    System.out.println("加密前：" + content);
    String resultString = AESUtil.encrypt(content);
    System.out.println("加密后：" + resultString);
    // 解密
    String decryptResult = AESUtil.decrypt(resultString);
    System.out.println("解密后：" + decryptResult);
    String dd="dD5NaGAYDZf1ru2nCoB6SNczjQXSQppTYh6ZrQcfmkJPcYlkZx5Tq3Ai4+gNO1Eb3rD5KwBIummuW+RZEMULOo0BRjSpJviPlMAhVGBR8gg=";
    System.out.println("密文:"+dd+",解密后：" + AESUtil.decrypt(dd));
  }

}

2.测试结果：