简单的置换算法

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利用栈的特性，实现简单的置换

package net.as.cn;import java.util.Stack;/** * 2013.3.22 am * 置换算法 * @author chenas * */public class MyZhiHuan {/** * 加密解密算法 * @param miOrMingWen * 明文或者密文 * @return */public String code(String miOrMingWen){Stack<String> stack = new Stack<String>();StringBuffer sBff = new StringBuffer();String[] words = miOrMingWen.split("");for(int i=0; i<words.length; i++){stack.push(words[i]); //入栈}while(!stack.isEmpty()){String word = stack.pop();char[] chars = word.toCharArray();Stack<Character> _stack = new Stack<Character>();for(int i=0; i<chars.length; i++){_stack.push(chars[i]);}while(!_stack.isEmpty()){sBff.append(_stack.pop());}}return sBff.toString();}public static void main(String[] args){String test = "you are an amazing guy";MyZhiHuan mz = new MyZhiHuan();String miw = mz.code(test);System.out.println(miw);String mw = mz.code(miw);System.out.println(mw);}}