简单的加密解密方法

package com.homework;

/*
* 简单的加密与解密
*/
public class H2 {

public static void main(String[] args) {

H2 test = new H2();
String aa = test.jiami("1234123456");
String bb = test.jiemi(aa);
System.out.println("加密："+aa);
System.out.println("源码："+bb);
}

//加密方法
public String jiami(String str1){

str1 = str1.replace("1", "a");
str1 = str1.replace("2", "b");
str1 = str1.replace("3", "c");
str1 = str1.replace("4", "d");
return str1;
}

//解密方法
public String jiemi(String str2){

str2 = str2.replace("a","1");
str2 = str2.replace("b","2");
str2 = str2.replace("c","3");
str2 = str2.replace("d","4");
return str2;
}
}