安卓DES加密解密

package com.qianfeng.softpo.desdemo29.utils;
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.SecretKeySpec;
public class DESUtils {
    public static byte[] encrypt(byte[] data, byte[] password) {
        byte[] ret = null;
        //判断参数是否符合条件
       if(data!=null&&data.length>0){
            if(password!=null&&password.length==8){
                try {
                    //1、创造加密引擎
                    Cipher cipher = Cipher.getInstance("DES");
                    //2、初始化
                    SecretKeySpec key = new SecretKeySpec(password,"DES");
                    cipher.init(Cipher.ENCRYPT_MODE,key);
                    //3、对数据进行加密
                    ret =cipher.doFinal(data);
                } catch (NoSuchAlgorithmException e) {
                    e.printStackTrace();
                } catch (NoSuchPaddingException e) {
                    e.printStackTrace();
                } catch (InvalidKeyException e) {
                    e.printStackTrace();
                } catch (BadPaddingException e) {
                    e.printStackTrace();
                } catch (IllegalBlockSizeException e) {
                    e.printStackTrace();
                }
            }
        }
        return ret;
    }

    public static byte[] decrypt(byte[] data, byte[] password) {
        byte[] ret = null;
        if(data!=null&&data.length>0){
            if(password!=null&&password.length==8){
                try {
                    //1、获取解密引擎
                    Cipher cipher =Cipher.getInstance("DES");
                    //2、初始化
                    SecretKeySpec key = new SecretKeySpec(password,"DES");
                    cipher.init(Cipher.DECRYPT_MODE,key);

                    //3、解密
                    ret = cipher.doFinal(data);

                }catch (NoSuchAlgorithmException e) {
                    e.printStackTrace();
                } catch (NoSuchPaddingException e) {
                    e.printStackTrace();
                } catch (InvalidKeyException e) {
                    e.printStackTrace();
                } catch (BadPaddingException e) {
                    e.printStackTrace();
                } catch (IllegalBlockSizeException e) {
                    e.printStackTrace();
                }
            }
        }
        return ret;
    }
}