生成大小字母以及数字混乱的6位验证码

迷南。 2021-11-01 09:54 357阅读 0赞

需求：生成大小字母以及数字混乱的6位验证码

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1 public class VerifyCode {
     2     public static String getCode(int length){
     3         String code = "";
     4         for(int i=0;i<length;i++){
     5             boolean boo = (int)(Math.random()*2)==0;
     6             if(boo){
     7                 code += String.valueOf((int)(Math.random()*10));
     8             }else {
     9                 int temp = (int)(Math.random()*2)==0?65:97;
    10                 char ch = (char)(Math.random()*26+temp);
    11                 code += String.valueOf(ch);
    12             }
    13         }
    14         return code;
    15     }
    16 
    17     public static void main(String[] args) {
    18 
    19         System.out.println(VerifyCode.getCode(6));
    20         System.out.println("-----------------");
    21         System.out.println(VerifyCode.getVerify(6));
    22     }
    23 
    24     public static String getVerify(int length){
    25         String code = "";
    26         String str = "0123456789qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASFGHJKLZXCVBNM";
    27         String[] strs = str.split("");
    28         for(int i = 0;i<length;i++){
    29             code += strs[(int)(Math.random()*strs.length)];
    30         }
    31         return code;
    32     }
    33 }

import java.util.ArrayList;
    import java.util.Collections;
    import java.util.List;
    import java.util.Random;
    
    /**
     * @author Administrator
     *    随机生成6位验证码
     */
    public class Test01 {
        public static void main(String[] args) {
            //创建一个ArrayList集合，存放生成的代码
            List<Object> list = new ArrayList();
            //for循环生成6位验证码
            for(int i = 0;i<6;i++) {
                //if语句交替判断生成数字或者字母
                if(i%2==0) {
                    int b = (int)(Math.random()*10);//生成0~9的数字
                    list.add(b);
                }else {
                    boolean flag = false;
                    do {
                        int a = (int)(Math.random()*58+65);//生成大小写字母的ASCII码
                        //if排斥多余的中间其他字符
                        if(!(a>=91&&a<=95)) {
                            String s = (char)a+"";//数字转字母
                            list.add(s);
                            flag = true;
                        }
                    }while(!flag);
                }
            }
             Collections.shuffle(list);//shuffle随机排序
             String out = new String();
             for(Object s : list) {
                 out+=s;
             }
             System.out.println(out.toString());
        }
    }

转载于:https://www.cnblogs.com/Dean-0/p/11268094.html

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