题解 | #字符串加密#

JAVA

// ABCDEFGHIJKLMNOPQRSTUVWXYZ
// nihaobcdefgjklmpgrstuvwxyz
// ni


import java.util.*;

public class Main{
    public static void  main(String[] args){
        Scanner scanner = new Scanner(System.in);
        while(scanner.hasNext()){
           String inputStr =scanner.nextLine();
           String keyStr =scanner.nextLine();
           String letterStr = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
           char[] letterArr = letterStr.toCharArray();
           StringBuilder sb = new StringBuilder();
           StringBuilder firstSb = new StringBuilder();
           StringBuilder outputSb = new StringBuilder();
           //输入的字符串inputStr去重
           for(int i =0; i<inputStr.length();i++){
               if(!firstSb.toString().contains((inputStr.charAt(i)+"").toLowerCase())){
                   firstSb.append(inputStr.charAt(i));
               }
           }
           for(int i =0; i<letterArr.length;i++){
               if(!inputStr.toUpperCase().contains(letterArr[i]+"")){
                   firstSb.append(letterArr[i]);
               }
           }
          //得到用于做对比的字符串
          inputStr = firstSb.toString();

          //在拿keyStr和inputStr做匹配
         for(int i =0; i<keyStr.length();i++){
             for(int j =0; j<letterStr.length();j++){
                 if(Character.toUpperCase(keyStr.charAt(i)) == Character.toUpperCase(letterStr.charAt(j))){
                     //判断输入的keyStr是大小写的处理
                     if(Character.isUpperCase(keyStr.charAt(i))){
                         outputSb.append(inputStr.charAt(j));
                     }else{
                         outputSb.append((inputStr.charAt(j)+"").toLowerCase());
                     }
                 }
             }
         }
         System.out.println(outputSb.toString());


        }
    }
}