利用java语言实现中缀表达式转后缀表达式，能判断操作符的优先级，把括号去掉，可以接受空格的输入。-Java language use infix expression turn postfix notation, the operator can determine the priority of the brackets removed, can accept input space.

一个简单的投票供能实现,用java编写,供初学者学习！-A simple voting power implementation, written in Java, for beginners learning!