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request用法和搭配是什么?怎么用python pipinstall

admin admin 发表于2022-04-28 22:58:32 浏览204 评论0

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request用法和搭配是什么

request的用法及搭配如下:

1、request的基本意思是“请求”,指有礼貌地、正式地要求,尤其适用于表示感到自己的要求因缺乏权威、手段或无法使对方感兴趣而可能得不到满足的情况,含有极有礼貌甚至讨好对方的意味。

2、request是及物动词,接名词、代词、动词不定式或that从句作宾语,从句中的谓语动词须用虚拟式。

3、request是表示愿望的动词,通常不用于进行体。

搭配短语:

1、request eagerly 迫切要求

2、request earnestly 恳求

3、request formally 正式邀请

4、request immediately 立即请求

近义词

ask 

英 [ɑːsk]   美 [æsk]    

v. 询问,请求,邀请,要求,开价,期待

例句:I’m calling to ask you about the delivery.

翻译:我打电话给你,是询问发货的事。

怎么用python pipinstall

打开cmd,输入pip install packages_name其中最后那个参数是你要安装的包的名字更新用pip install --upgrade packages_name速度比较慢,可以替换国内源,详情请参考中科大或者清华的pypi源常用的命令就是上面那两条,其他命令你要想知道,直接输入pip回车就会看到信息

java des 加密 解密 密钥随机取得方法

java DES 加密 解密 生成随机密钥举例说明://保存生成的key public static void saveDesKey() { try { SecureRandom sr = new SecureRandom(); // 选择的DES算法生成一个KeyGenerator对象 KeyGenerator kg = KeyGenerator.getInstance(“DES“); kg.init(sr); // 相对路径 需要新建 conf 文件夹 // String fileName = “conf/DesKey.xml“; // 绝对路径 String fileName = “d:/DesKey.xml“; FileOutputStream fos = new FileOutputStream(fileName); ObjectOutputStream oos = new ObjectOutputStream(fos); // 生成密钥 Key key = kg.generateKey(); oos.writeObject(key); oos.close(); } catch (Exception e) { e.printStackTrace(); } } //获取生成的key public static Key getKey() { Key kp = null; try { // 相对路径 需要新建 conf 文件夹 // String fileName = “conf/DesKey.xml“; // InputStream is = Encrypt.class.getClassLoader().getResourceAsStream(fileName); // 绝对路径 String fileName = “d:/DesKey.xml“; FileInputStream is = new FileInputStream(fileName); ObjectInputStream oos = new ObjectInputStream(is); kp = (Key) oos.readObject(); oos.close(); } catch (Exception e) { e.printStackTrace(); } return kp; } //加密开始 public static void encrypt(String file, String dest) throws Exception { Cipher cipher = Cipher.getInstance(“DES“); cipher.init(Cipher.ENCRYPT_MODE, getKey()); InputStream is = new FileInputStream(file); OutputStream out = new FileOutputStream(dest); CipherInputStream cis = new CipherInputStream(is, cipher); byte buffer = new byte; int r; while ((r = cis.read(buffer)) 》 0) { out.write(buffer, 0, r); } cis.close(); is.close(); out.close(); } //解密开始 public static void decrypt(String file, String dest) throws Exception { Cipher cipher = Cipher.getInstance(“DES“); cipher.init(Cipher.DECRYPT_MODE, getKey()); InputStream is = new FileInputStream(file); OutputStream out = new FileOutputStream(dest); CipherOutputStream cos = new CipherOutputStream(out, cipher); byte buffer = new byte; int r; while ((r = is.read(buffer)) 》= 0) { cos.write(buffer, 0, r); } cos.close(); out.close(); is.close(); }}//des加密主方法public class DES { public static void main(String args) throws Exception { Encrypt.saveDesKey(); System.out.println(“生成key“); Encrypt.getKey(); System.out.println(“获取key“); Encrypt.encrypt(“d:\\hello.txt“, “d:\\encrypt.txt“); System.out.println(“加密“); Encrypt.decrypt(“d:\\encrypt.txt“, “d:\\decrypt.txt“); System.out.println(“解密“); }以上方法亲测可用。