一般trie（特里）树的实现例子，这里的trie树反映了一定的设计思路，但实际工程中须优化，如使用双数组的trie树。-General trie (Terry) the realization of the tree example, where the trie tree certainly reflect a degree of design ideas, but the actual project to be optimized, such as the use of dual-array trie tree.