博客
关于我
用C#生成随机中文汉字验证码的基本原理
阅读量:345 次
发布时间:2019-03-04

本文共 4675 字,大约阅读时间需要 15 分钟。

???????????????????

???????????????????????????????????????????????????????????????????????????????????????????????????????

1980??????????????????????GB2312-80?????????????????????GB18030-2000????????????????????????GB2312-1980?GB13000-1993?????????????????????????????GB18030?????Windows?????????????????????????????GB2312?????????????????????????????????????????????GB2312?????????????????????????????????????????????????????

??????????????????????????????????????????????????GB2312???????????????????ba c3???ba?????c3?????????????????????15??AF??????????????????????16??B0???????GB2312?????????

?.NET??????????????System.Text??????Encoding???????????????????????????????Encoding.GetBytes()????????????????Encoding.GetString()??????????????????????GB2312?????????????????????

using System;using System.Text;namespace ConsoleApplication{    class ChineseCode    {        public static object[] CreateRegionCode(int strlength)        {            string[] rBase = new string[16];            Random rnd = new Random((DateTime.Now.Ticks) + i);                        object[] bytes = new object[strlength];                        for (int i = 0; i < strlength; i++)            {                int r1 = rnd.Next(11, 14);                string str_r1 = rBase[r1].Trim();                int r2 = rnd.Next(0, 7);                if (r1 == 13)                {                    r2 = rnd.Next(0, 16);                }                else if (r1 == 15)                {                    r2 = rnd.Next(0, 16);                }                else                {                    r2 = rnd.Next(0, 16);                }                string str_r2 = rBase[r2].Trim();                                byte byte1 = Convert.ToByte(str_r1 + str_r2, 16);                byte byte2 = Convert.ToByte(str_r3 + str_r4, 16);                                byte[] str_r = new byte[] { byte1, byte2 };                bytes.SetValue(str_r, i);            }            return bytes;        }                public static void Main()        {            Encoding gb = Encoding.GetEncoding("gb2312");            object[] bytes = CreateRegionCode(4);                        string str1 = gb.GetString((byte[])Convert.ChangeType(bytes[0], typeof(byte[])));            string str2 = gb.GetString((byte[])Convert.ChangeType(bytes[1], typeof(byte[])));            string str3 = gb.GetString((byte[])Convert.ChangeType(bytes[2], typeof(byte[])));            string str4 = gb.GetString((byte[])Convert.ChangeType(bytes[3], typeof(byte[])));                        Console.WriteLine(str1 + str2 + str3 + str4);        }    }}

??????????????????????????????GetString()???????????????????????????????????????????

?????????C#????????

using System;using System.Text;namespace ConsoleApplication{    class ChineseCode    {        public static object[] CreateRegionCode(int strlength)        {            string[] rBase = new string[16];            Random rnd = new Random((DateTime.Now.Ticks) + i);                        object[] bytes = new object[strlength];                        for (int i = 0; i < strlength; i++)            {                int r1 = rnd.Next(11, 14);                string str_r1 = rBase[r1].Trim();                int r2 = rnd.Next(0, 7);                if (r1 == 13)                {                    r2 = rnd.Next(0, 16);                }                else if (r1 == 15)                {                    r2 = rnd.Next(0, 16);                }                else                {                    r2 = rnd.Next(0, 16);                }                string str_r2 = rBase[r2].Trim();                                byte byte1 = Convert.ToByte(str_r1 + str_r2, 16);                byte byte2 = Convert.ToByte(str_r3 + str_r4, 16);                                byte[] str_r = new byte[] { byte1, byte2 };                bytes.SetValue(str_r, i);            }            return bytes;        }                public static void Main()        {            Encoding gb = Encoding.GetEncoding("gb2312");            object[] bytes = CreateRegionCode(4);                        string str1 = gb.GetString((byte[])Convert.ChangeType(bytes[0], typeof(byte[])));            string str2 = gb.GetString((byte[])Convert.ChangeType(bytes[1], typeof(byte[])));            string str3 = gb.GetString((byte[])Convert.ChangeType(bytes[2], typeof(byte[])));            string str4 = gb.GetString((byte[])Convert.ChangeType(bytes[3], typeof(byte[])));                        Console.WriteLine(str1 + str2 + str3 + str4);        }    }}

????????????????????????????????????????????????GB2312?????????????????????????B?C?D???????????????????

????????????????????????????????????????????????

转载地址:http://wfje.baihongyu.com/

你可能感兴趣的文章
OpenCV与AI深度学习 | 实践教程|旋转目标检测模型-TensorRT 部署(C++)
查看>>
OpenCV与AI深度学习 | 工业缺陷检测中数据标注需要注意的几个事项
查看>>
OpenCV与AI深度学习 | 干货 | 深度学习模型训练和部署的基本步骤
查看>>
OpenCV与AI深度学习 | 手把手教你用Python和OpenCV搭建一个半自动标注工具(详细步骤 + 源码)
查看>>
OpenCV与AI深度学习 | 水下检测+扩散模型:或成明年CVPR最大惊喜!
查看>>
OpenCV与AI深度学习 | 深入浅出了解OCR识别票据原理
查看>>
OpenCV与AI深度学习 | 深度学习检测小目标常用方法
查看>>
OpenCV与AI深度学习 | 超越YOLOv10/11、RT-DETRv2/3!中科大D-FINE重新定义边界框回归任务
查看>>
OpenCV与AI深度学习 | 高效开源的OCR工具:Surya-OCR介绍与使用
查看>>
OpenCV与AI深度学习|16个含源码和数据集的计算机视觉实战项目(建议收藏!)
查看>>
Opencv中KNN背景分割器
查看>>
OpenCV中基于已知相机方向的透视变形
查看>>
OpenCV中的监督学习
查看>>
opencv中读写视频
查看>>
OpenCV中遇到Microsoft C++ 异常 cv::Exception
查看>>
opencv之cv2.findContours和drawContours(python)
查看>>
opencv之namedWindow,imshow出现两个窗口
查看>>
opencv之模糊处理
查看>>
Opencv介绍及opencv3.0在 vs2010上的配置
查看>>
OpenCV使用霍夫变换检测图像中的形状
查看>>