摘要: 由于公司需要做一个监控系统,然后需要一个简单的登录页面,所以就需要一个简单的登录并需要验证,所以就在网上查了一下简单的验证码制作,废话不多说,代码如下:
1.pom引用
<dependency><groupId>com.github.penggle</groupId><artifactId>kaptcha</artifactId><version>2.3.2</version></dependency>
2.配置参数代码
import com.google.code.kaptcha.impl.DefaultKaptcha;import com.google.code.kaptcha.util.Config;import org.springframework.context.annotation.Bean;import org.ponent;import java.util.Properties;@Component public class KaptchaConfig { @Bean(name="captchaProducer")public DefaultKaptcha getDefaultKaptcha(){ DefaultKaptcha defaultKaptcha = new DefaultKaptcha();Properties properties = new Properties(); properties.setProperty("kaptcha.border", "no");properties.setProperty("kaptcha.border.color", "105,179,90");properties.setProperty("kaptcha.textproducer.font.color", "black");properties.setProperty("kaptcha.image.width", "125");properties.setProperty("kaptcha.image.height", "45");properties.setProperty("kaptcha.textproducer.font.size", "35");properties.setProperty("kaptcha.textproducer.char.length", "4");properties.setProperty("kaptcha.textproducer.font.names", "宋体,楷体,微软雅黑"); Config config = new Config(properties); defaultKaptcha.setConfig(config); return defaultKaptcha;}
3.获取验证图片代码和登录代码,以及存储session和清除session退出代码
import com.google.code.kaptcha.Constants;import com.google.code.kaptcha.Producer;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.PostMapping;import org.springframework.web.bind.annotation.RequestBody;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.ResponseBody;import org.springframework.web.servlet.ModelAndView;import javax.imageio.ImageIO;import javax.servlet.ServletOutputStream;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import javax.servlet.http.HttpSession;import java.awt.image.BufferedImage;import java.io.IOException;import com.unionpay.gmp.bean.UserInfo;import com.unionpay.gmp.service.GmpLoginService;import com.unionpay.gmp.utils.ResultUtil;import com.unionpay.gmp.vo.response.ResponseVo;@Controller@RequestMapping("/user")public class GmpLoginController {private static final Logger logger = LoggerFactory.getLogger(GmpLoginController.class);private Producer captchaProducer = null;@Autowiredpublic void setCaptchaProducer(Producer captchaProducer) {this.captchaProducer = captchaProducer;}@Autowiredprivate GmpLoginService gmpUserService;/*** 获取验证码图片* Gets captcha code.** @param request the request* @param response the response* @return the captcha code* @throws IOException the io exception*/@RequestMapping("/captchaCode")public ModelAndView getCaptchaCode(HttpServletRequest request, HttpServletResponse response) throws IOException {HttpSession session = request.getSession();response.setDateHeader("Expires", 0);response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");response.addHeader("Cache-Control", "post-check=0, pre-check=0");response.setHeader("Pragma", "no-cache");response.setContentType("image/jpeg");//生成验证码文本String capText = captchaProducer.createText();session.setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);//利用生成的字符串构建图片BufferedImage bi = captchaProducer.createImage(capText);ServletOutputStream out = response.getOutputStream();ImageIO.write(bi, "jpg", out);try {out.flush();} finally {out.close();}return null;}/*** 登录接口*/@RequestMapping(value = "/login")@ResponseBodypublic ResponseVo login(UserInfo userInfo, HttpServletRequest request) throws IOException {String accountName = userInfo.getAccountName();String password = userInfo.getPassword();String captcha = userInfo.getCaptcha();System.out.println("登录 |信息打印| 账号:"+accountName +"| 密码 :"+password);// 从session中获取之前保存的验证码跟前台传来的验证码进行匹配HttpSession session = request.getSession();String kaptcha = (String) request.getSession().getAttribute(Constants.KAPTCHA_SESSION_KEY);//System.out.println("##########################验证码打印 ::"+kaptcha);if (kaptcha == null) {return ResultUtil.error("验证码已失效");}if (!captcha.equals(kaptcha)) {return ResultUtil.error("验证码不正确");}// 用户信息UserInfo user = gmpUserService.findUserByAccountName(userInfo);// 账号不存在、密码错误if (user == null) {return ResultUtil.error("账号不存在");}if (!user.getPassword().equals(password)) {return ResultUtil.error("密码不正确");}//将用户信息存入sessionrequest.getSession().setAttribute("trustpointsUserInfo", user);return ResultUtil.success("查询成功", user);}/*** @param user* @param request* @param response* @desc: 修改密码*/@RequestMapping(value = "/updateUserInfo")@ResponseBodypublic ResponseVo updateUserInfo(UserInfo user, HttpServletRequest request, HttpServletResponse response) {try {logger.info("密码修改 | 开始 | 接收到用户修改请求 ");if (verifyAdmin(request)) {//1. 判断完正在登录中以后即开始修改密码//2. 调用修改密码接口//3. 判断是否修改成功long updateFlag = gmpUserService.updateUserInfo(user);if (updateFlag == 1) {logger.info("密码修改 | 成功 | 请重新登录! ");return ResultUtil.success("修改成功", "请重新登录");} else {return ResultUtil.error("修改失败");}// HttpSession session = request.getSession();} else {logger.warn("密码修改 | 失败 | 用户未登录或登录已超时! ");return ResultUtil.error("当前未登录");}} catch (Exception e) {logger.warn("密码修改 | 失败 | 用户未登录或登录已超时! " + e);return ResultUtil.error("修改失败");}}/*** @param user* @param request* @param response* @return 退出登录, 返回到登录页面*/@RequestMapping(value = "/logout")@ResponseBodypublic ResponseVo logout(UserInfo user, HttpServletRequest request, HttpServletResponse response) {try {logger.info("退出登录 | 开始 | 接收到用户退出请求 ");if (verifyAdmin(request)) {HttpSession session = request.getSession();session.setAttribute("trustpointsUserInfo", null);}} catch (Exception e) {logger.info("退出登录 | 错误 | 请重试! "+e);}logger.info("退出登录 | 成功 | 成功退出用户 ");return ResultUtil.success("退出成功", "成功退出用户!");}/*** @desc: 判断session是否过期* @version: @1.0*/private boolean verifyAdmin(HttpServletRequest request) {HttpSession session = request.getSession();UserInfo user = (UserInfo) session.getAttribute("trustpointsUserInfo");if (user == null) {String msg = "*当前未登录";request.setAttribute("msg", msg);return false;}String accountName = user.getAccountName();if (accountName == null || accountName.equals("")) {String msg = "*用户状态异常";request.setAttribute("msg", msg);return false;}return true;}
4. 上面的代码已经完整的(不带权限)将一个简单的登录实现出来,供大家参考! 还有就是网上很多例子,你给代码了,然后你不给引用的import ,真的挺烦的.
注意:配置文件和controller是分开的!
5.效果图
