JAVA大神能不能给讲解下这个代码每句是什么意思?

半个情人

mport Decoder.BASE64Decoder;
import Decoder.BASE64Encoder;
import java.io.IOException;
import java.io.PrintStream;
import java.security.Key;
import java.security.SecureRandom;
import java.security.spec.KeySpec;
import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESKeySpec;

public class DES
{
  private byte[] desKey;

  public DES(String paramString)
  {
    this.desKey = paramString.getBytes();
  }

  public static byte[] base64Decode(String paramString)
    throws IOException
  {
    if (paramString == null) {}
    for (paramString = null;; paramString = new BASE64Decoder().decodeBuffer(paramString)) {
      return paramString;
    }
  }

  public static String base64Encode(byte[] paramArrayOfByte)
  {
    if (paramArrayOfByte == null) {}
    for (paramArrayOfByte = null;; paramArrayOfByte = new BASE64Encoder().encode(paramArrayOfByte)) {
      return paramArrayOfByte;
    }
  }

  public static void main(String[] paramArrayOfString)
    throws Exception
  {
    paramArrayOfString = new DES("abcdefgh");
    System.out.println("Encode:" + paramArrayOfString.encrypt("a"));
    System.out.println("Decode:" + paramArrayOfString.decrypt(paramArrayOfString.encrypt("a")));
  }

  public String decrypt(String paramString)
    throws Exception
  {
    return new String(desDecrypt(base64Decode(paramString)));
  }

  public byte[] desDecrypt(byte[] paramArrayOfByte)
    throws Exception
  {
    SecureRandom localSecureRandom = new SecureRandom();
    Object localObject = new DESKeySpec(this.desKey);
    SecretKey localSecretKey = SecretKeyFactory.getInstance("DES").generateSecret((KeySpec)localObject);
    localObject = Cipher.getInstance("DES");
    ((Cipher)localObject).init(2, localSecretKey, localSecureRandom);
    return ((Cipher)localObject).doFinal(paramArrayOfByte);
  }

  public byte[] desEncrypt(byte[] paramArrayOfByte)
    throws Exception
  {
    SecureRandom localSecureRandom = new SecureRandom();
    Object localObject = new DESKeySpec(this.desKey);
    localObject = SecretKeyFactory.getInstance("DES").generateSecret((KeySpec)localObject);
    Cipher localCipher = Cipher.getInstance("DES");
    localCipher.init(1, (Key)localObject, localSecureRandom);
    return localCipher.doFinal(paramArrayOfByte);
  }

  public String encrypt(String paramString)
    throws Exception
  {
    return base64Encode(desEncrypt(paramString.getBytes()));
  }
}

MY寂寞的夜

iv=localSecureRandom   随机 8位  16位字节
key=this.desKey
DES  CBC

半个情人

MY寂寞的夜 发表于 2017-8-30 00:29
iv=localSecureRandom   随机 8位  16位字节
key=this.desKey
DES  CBC

能不能给详细讲解一下

半个情人

继续求助!!!!!!!!