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In upload mode, server reads data from its standard input device and writes it to the socket. @throws Exception

In download mode, server reads data from the socket and writes it to standard output. @throws Exception

This function encrypts the plain text to cipher text using the key provided. You'll have to use the same key for decryption @param _plainText

@param _inputText Text to be encrypted or decrypted @param _encryptionKey Encryption key to used for encryption / decryption @pa

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In download mode, server reads data from the socket and writes it to standard output. @throws Exception

In download mode, client reads data from the socket and writes it to standard output. @throws Exception

In download mode, client reads data from the socket and writes it to standard output. @throws Exception

In download mode, server reads data from the socket and writes it to standard output. @throws Exception

In download mode, client reads data from the socket and writes it to standard output. @throws Exception

In download mode, client reads data from the socket and writes it to standard output. @throws Exception

In download mode, server reads data from the socket and writes it to standard output. @throws Exception

Creates welcome socket and starts update loop to handle arbitrary sequence of clients making requests. @param port a port number @throws Exception

Creates client socket makes request to the server. @throws Exception

Creates client socket makes request to the server. @throws Exception

Creates welcome socket and starts update loop to handle arbitrary sequence of clients making requests. @param port a port number @throws Exception

Creates welcome socket and starts update loop to handle arbitrary sequence of clients making requests. @param port a port number @throws Exception

Creates client socket makes request to the server. @throws Exception

Creates client socket makes request to the server. @throws Exception

Creates welcome socket and starts update loop to handle arbitrary sequence of clients making requests. @param port a port number @throws Exception

In upload mode, server reads data from its standard input device and writes it to the socket. @throws Exception

In upload mode, client reads data from its standard input device and writes it to the socket. @throws Exception

In upload mode, client reads data from its standard input device and writes it to the socket. @throws Exception

In upload mode, server reads data from its standard input device and writes it to the socket. @throws Exception

In upload mode, client reads data from its standard input device and writes it to the socket. @throws Exception

In upload mode, client reads data from its standard input device and writes it to the socket. @throws Exception

In upload mode, server reads data from its standard input device and writes it to the socket. @throws Exception

私有化构造防止被实例化

This function computes the SHA256 hash of input string @param text input text whose SHA256 hash has to be computed @param length length of the text to