根据输入小写英文字母和输入的对应权值创建哈夫曼树，可以求出每个小写英文字母的哈夫曼编码，将文本中的字母对应的哈夫曼编码写入文本中，实现对文本的编码。(The corresponding weights of input lowercase letters and input to create English Huffman tree can be calculated according to the Huffman encoding each lowercase letters English, Huffman encoding the letters in the corresponding text written in the text of the text encoding.)