public static String getRandomString(int length){
        String str="abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
        SecureRandom random= new SecureRandom();
        StringBuffer sb=new StringBuffer();
        for(int i=0;i<length;i++){
            int number=random.nextInt(62);
            sb.append(str.charAt(number));
        }
        return sb.toString();
    }
@ClassName: demo
@Description: TODO
@Author: Summer
@Date: 2021/7/12 16:03
@Version: v1.0.0
@Description:
src/main/java/com/summersec/attack/core/demo.java