Example sharing: Randomly generate an eight-digit discount code and save it to the Mysql database

import java.util.Random;
/**
*功能：随机生成优惠码
*@author iamwiam
*
*/
public class Activatedcode {
 public int ACTIVATEDCODENUM = 200; //生成的优惠码数量
 Random random = new Random();
 String candicatedCode = "abcedefghijklmnopqrstuvwxyz";//优惠码包含小写字母
 candicatedCode+=candicatedCode.toUpperCase()；//优惠码包含大写字母
 candicatedCode+="1234567890";//优惠码包含阿拉伯数字
 for(int i=0; i<p>2. Save the discount code in the database </p><pre class="brush:php;toolbar:false">private static void insertToMySql(String res){ 
int n = 0; 
try{ 
Class.forName(“com.mysql.jdbc.Driver”); 
Connection connection = DriverMannager.getConnection(“jdbc:mysql://127.0.0.1/tb_act_code”,”zy”,”IamWiam”); 
String sql = “insert into checkNum(value) values(?)”; 
PreparedStatement ps = connection.prepareStatement(sql); 
ps.setObject(1,res); //占位符顺序从1开始，第一个参数是占位符的位置，第二个参数是占位符的值 
n = ps.executeUpdate(); 
}catch(ClassNotFoundException e){ 
e.printStackTrace(); 
}catch(SQLException e){ 
e.printStackTrace(); 
} 
}

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Random;
/**
 * 功能：随机生成优惠码
 * @author iamwiam
 *
 */
public class Activatedcode {
 public static void main(String[] args) {
  final int ACTIVATEDCODENUM = 200;
  Random random = new Random();
  String candicatedCode = "abcdefghijklmnopqrstuvwxyz";
  candicatedCode+=candicatedCode.toUpperCase();
  candicatedCode+="1234567890";
  for(int i=0;i<activatedcodenum><p>4. The results are as follows</p>
<p><img title="" alt="Example sharing: Randomly generate an eight-digit discount code and save it to the Mysql database" src="https://img.php.cn/upload/article/000/054/025/206775316b4935c9e4a9ca5472741680-0.jpg"></p>
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