程序在myEclipse中可以运行 在命令行里运行出错

package com.hnzskj.encrypt;



import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;

import java.security.NoSuchAlgorithmException;



import javax.crypto.BadPaddingException;

import javax.crypto.Cipher;

import javax.crypto.IllegalBlockSizeException;

import javax.crypto.KeyGenerator;

import javax.crypto.SecretKey;



import org.apache.commons.codec.binary.Base64;



public class Encrypt {

	

	/**

	 * 对称加密-产生密钥

	 */

	public static void generatorKey() {

		SecretKey key = null;

		try {

			// 指定算法,这里为DES;如果想用Blowfish算法,则用getInstance("Blowfish")

			// BouncyCastle基本上支持所有通用标准算法

			KeyGenerator keygen = KeyGenerator.getInstance("DES");

			// 指定密钥长度,长度越高,加密强度越大

			keygen.init(56);

			// 产生密钥

			key = keygen.generateKey();

			// 构造输出文件,这里的目录是动态的,根据用户名称来构造目录

			ObjectOutputStream keyFile = new ObjectOutputStream(

					new FileOutputStream("c:\\encrypt\\yhb.des"));

			keyFile.writeObject(key);

			keyFile.close();

		} catch (NoSuchAlgorithmException e5) {

			// generateKey()抛出的异常

			e5.printStackTrace();

			System.out.print("no such algorithm");

			System.exit(0);

		} catch (IOException e4) {

			e4.printStackTrace();

			System.out.print("error when generate the deskey");

			System.exit(0);

		}

	}

	

	/**

	 * 方法描述：对称加密-读取密钥

	 */

	private static SecretKey getSecretKey() {

		// 从密钥文件中读密钥

		SecretKey key = null;

		try {

			ObjectInputStream keyFile = new ObjectInputStream(

					new FileInputStream("c:\\encrypt\\yhb.des"));

			key = (SecretKey) keyFile.readObject();

			keyFile.close();

		} catch (FileNotFoundException ey1) {

			ey1.printStackTrace();

			System.out.println("Error when read keyFile");

			System.exit(0);

		} catch (Exception ey2) {

			System.out.println("error when read the keyFile");

			ey2.printStackTrace();

		}

		return key;

	}



	/**

	 * 方法描述：加密文本信息

	 */

	public static String encrypt(String encryptStr) {

		SecretKey key = getSecretKey();

		Cipher cipher = null;

		try {

			// 设置算法,应该与加密时的设置一样

			cipher = Cipher.getInstance("DES");

			// 设置解密模式

			cipher.init(Cipher.ENCRYPT_MODE, key);

		} catch (Exception ey3) {

			ey3.printStackTrace();

			System.out.println("Error when create the cipher");

		}

		byte[] data = null;

		try {

			data = cipher.doFinal(encryptStr.getBytes());

		} catch (IllegalBlockSizeException e) {

			e.printStackTrace();

		} catch (BadPaddingException e) {

			e.printStackTrace();

		}

		encryptStr = Base64.encodeBase64String(data);

		return encryptStr;

	}		

	

	public static void main(String[] args) {

		System.out.println(encrypt("加密字符串"));

	}

}

这个类在myeclipse中可以正常运行,但是命令行里执行时就出现以下问题:

java.security.NoSuchAlgorithmException: Cannot find any provider supporting DES
at javax.crypto.Cipher.getInstance(DashoA13*..)
at com.hnzskj.encrypt.Encrypt.encrypt(Encrypt.java:90)
at com.hnzskj.encrypt.Encrypt.main(Encrypt.java:110)
Error when create the cipher
Exception in thread "main" java.lang.NullPointerException
at com.hnzskj.encrypt.Encrypt.encrypt(Encrypt.java:99)
at com.hnzskj.encrypt.Encrypt.main(Encrypt.java:110)