springboot项目01-04demo源码

package com.pikacho.springbootbbs.controller; import com.wf.captcha.GifCaptcha; import com.wf.captcha.base.Captcha; import org.springframework.stereotype.Controller; import org.springframework.util.StringUtils; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.ResponseBody; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; @Controller public class KaptchaController { @GetMapping("/common/kaptcha") public void defaultKaptcha(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse) throws Exception{ httpServletResponse.setHeader("Cache-Control", "no-store"); httpServletResponse.setHeader("Pragma", "no-cache"); httpServletResponse.setDateHeader("Expires", 0); httpServletResponse.setContentType("image/gif"); // 设置三个参数， 宽， 高， 位数 GifCaptcha captcha = new GifCaptcha(75, 30, 4); // 设置类型 数字和字母混合 captcha.setCharType(Captcha.TYPE_DEFAULT); // 设置字体 captcha.setCharType(Captcha.FONT_9); // 将验证码输入session中 httpServletRequest.getSession().setAttribute("verifyCode", captcha.text().toLowerCase()); // 输出图片流 captcha.out(httpServletResponse.getOutputStream()); } @GetMapping("/verify") @ResponseBody public String verify(@RequestParam("code") String code, HttpSession session){ if(!StringUtils.hasLength(code)){ return "验证码不能为空"; } String kaptchaCode = session.getAttribute("verifyCode") + ""; System.out.println(kaptchaCode); if(!StringUtils.hasLength(kaptchaCode) || !code.equals(kaptchaCode)){ return "验证码错误"; } return "验证成功"; } }