6,2,1 get a verification code

 

1, tools

package com.bw.utils;
/**
 * 验证码生成器（4位数）
 */
import java.util.Random;

public class MessageUtil {
    public static String  creatYZM() {
        String a="";
        Random random = new Random();
        
        for (int i = 0; i < 4 ;i++) {
        a+=    random.nextInt(10);
        
        }
        System.out.println(a);
        return a;
        
    }
    

}

 

2. Background

 

    //getYZM
    @RequestMapping("/getYZM/{phone}")
    public Object getYZM(@PathVariable String phone){
        return MessageUtil.creatYZM();
        
        
    }

3, the front desk

  getYZM function () { 
        
        Alert ( "returns a verification code" ) 
        var Phone = $ ( "Phone #" ) .val () 
        
        $ .post (
                
                 "HTTP: // localhost: 8080 / getYZM /" + Phone, 
                function (obj ) { 
                    
                    Alert (obj) 
                
                } 
                
                ) 
        
    }