Java 验证码工具类
摘要：验证码代码工具代码如下： import javax.imageio.ImageIO;import java.awt.*;import java.awt.image.BufferedImage;import java.awt.image.RenderedImage;import java.io.Fil
阅读全文
posted @ 2020-03-28 12:32
03 2020 档案
Servlet实现文件下载
摘要：把代码复制到servlet中处理方法中：//1.接收用户文件名称String filename = req.getParameter("filename");//2.资源文件路径String realPath = this.getServletContext().getRealPath("/down
阅读全文
posted @ 2020-03-27 21:21
SQLyog连接报错 Error No.2058 Plugin caching_sha2_password could not be loaded
摘要：打开cmd：mysql -u root -p 输入密码root 进入mysql依次执行下面语句 ALTER USER'root'@'localhost' IDENTIFIED BY 'root' PASSWORD EXPIRE NEVER; #修改加密规则 ALTER USER'root'@'loc
阅读全文
posted @ 2020-03-01 19:44
