生成验证码工具类``` ValidateCodeUtil ``` ``` package com.xz.worker.u

ValidateCodeUtil

package com.xz.worker.util;

import java.util.Random;

/**
 * @author zagwk
 * @version 1.0
 * @date 2020/7/25 0025 14:37
 */
public class ValidateCodeUtil {
    public String createData() {
        return createData(6);
    }


    public String createData(int length) {
        StringBuilder sb = new StringBuilder();
        Random rand = new Random();
        for (int i = 0; i < length; i++) {
            sb.append(rand.nextInt(10));
        }
        return sb.toString();
    }
}