定义一个类，作为文本的加密类，定义一个加密公钥，将该文本进行加密，再定义一个类，接受加密类的公钥和加密过的文本，然后对其进行解密，将解密接过输出。-The definition of a class, as the encryption type of the text, the definition of a public key encryption, the encrypted text, and then define a class category to receive the pu