Java 通用的DES加密工具类的实现

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

import javax.crypto.*;
import javax.crypto.spec.DESKeySpec;
import javax.crypto.spec.IvParameterSpec;

import java.security.Key;
import java.security.spec.AlgorithmParameterSpec;
/**
* 使用DES加密和解密的方法
*
* @修改者  小老虎2
* @author:azhong
* @change:exmorning
* */
public class CryptoTools {

private final byte[] DESkey = "kingfykj".getBytes("UTF-8");// 设置密钥，略去
private final byte[] DESIV = {0x12, 0x34, 0x56, 0x78, (byte) 0x90, (byte) 0xAB, (byte) 0xCD, (byte) 0xEF};// 设置向量，略去

private AlgorithmParameterSpec iv = null;// 加密算法的参数接口，IvParameterSpec是它的一个实现
private Key key = null;

public CryptoTools() throws Exception {
DESKeySpec keySpec = new DESKeySpec(DESkey);// 设置密钥参数
iv = new IvParameterSpec(DESIV);// 设置向量
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");// 获得密钥工厂
key = keyFactory.generateSecret(keySpec);// 得到密钥对象

}

public String encode(String data) throws Exception {
Cipher enCipher = Cipher.getInstance("DES/CBC/PKCS5Padding");// 得到加密对象Cipher
enCipher.init(Cipher.ENCRYPT_MODE, key, iv);// 设置工作模式为加密模式，给出密钥和向量
byte[] pasByte = enCipher.doFinal(data.getBytes("utf-8"));
BASE64Encoder base64Encoder = new BASE64Encoder();
return base64Encoder.encode(pasByte);
}

public String decode(String data) throws Exception {
Cipher deCipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
deCipher.init(Cipher.DECRYPT_MODE, key, iv);
BASE64Decoder base64Decoder = new BASE64Decoder();

byte[] pasByte = deCipher.doFinal(base64Decoder.decodeBuffer(data));

return new String(pasByte, "UTF-8");
}
public static void main(String[] args) {
try {
String test = "aaaaaa";
CryptoTools des = new CryptoTools();//自定义密钥
System.out.println("加密前的字符："+test);
System.out.println("加密后的字符："+des.encode(test));
System.out.println("解密后的字符："+des.decode(des.encode(test)));
} catch (Exception e) {
e.printStackTrace();
}
}
}