zoukankan      html  css  js  c++  java
  • 2020暑假项目-车辆派遣管理系统开发记录#2

    2020暑假项目-车辆派遣管理系统开发记录#2

    • 1、今日完成用户的登陆功能,
      - 输入用户名密码以及验证码后进行登陆,配置成功跳转到主界面
      - 进行项目路径过滤,所有未登陆的都必须进行登陆才可以使用
    • 2、核心源码
      登陆页面
                      <form action="<%=basePath %>user/login" method="post">
                              用户名:<input type="text" name="userName">
                        <br>
                              密码:<input type="password" name="password">
                        <br>
                              验证码:<input type="text" name="code" ><img id="codeImg" title="点击获取新验证码"
                                                     src="<%=path%>/verifycode/getVerifyCodeImage"
                                                     onclick="changeimg()" width="62" height="28" alt=""
                                                     style="display:inline-block;">
                        <input type="submit" value="登陆">
                    </form>
    

    登陆逻辑

                @RequestMapping(value = "/login", method = RequestMethod.POST)
                    public String pcLogin(String userName, String password, String code, HttpSession session) {
                  String sessionCode = (String) session.getAttribute(Constants.SESSION_LOGIN_CODE);
                  System.out.println(userName);
                  if (!StringUtil.isNullOrEmpty(userName) && !StringUtil.isNullOrEmpty(password)
                                && !StringUtil.isNullOrEmpty(sessionCode) && sessionCode.equalsIgnoreCase(code)) {
                      // 通过用户名查找用户
                      UserInfo user = userInfoService.getUserByLoginName(userName);
                      System.out.println(user);
                            System.out.println(user.getLoginName());
                      if (user != null) {
                          if (user.getPwd().equals(password) && user.getStatus() == 1) {
                        session.setAttribute(Constants.CURRENT_USER, user);
                        return "demo";
                          }
                      }
                  }
                  return "userinfo";
              }
    

    userInfoMapper.xml

      <select id="selectByLoginName" resultMap="BaseResultMap" parameterType="java.lang.String" >
        select
        <include refid="Base_Column_List" />
        from user_info
        where login_name = #{loginName,jdbcType=VARCHAR}
      </select>
    

    验证码

    
    /**
     * 验证码
     *
     */
    @Controller
    @RequestMapping(value = "/verifycode")
    public class VerifyCodeController {
    	
    	@RequestMapping(value = "/getVerifyCodeImage")
        public void getVerifyCodeImage(String type,HttpServletRequest request, HttpServletResponse response) throws IOException {
            // 设置验证码字符的字体和字号。
            Font mFont = new Font("Arial Black", Font.PLAIN, 22);
    
            //清除缓存,每次访问该页面时都从服务器端读取
            response.setHeader("Pragma", "No-cache");
            response.setHeader("Cache-Control", "no-cache");
            response.setDateHeader("Expires", 0);
            response.setContentType("image/jpeg");
    
            // 设置验证码图片的长度和高度。
            int width = 86, height = 40;
            BufferedImage image = new BufferedImage(width, height,
                    BufferedImage.TYPE_INT_RGB);
    
            //画图画板
            Graphics g = image.getGraphics();
            //定义一个随机数
            Random random = new Random();
            //设置画板背景颜色
    //          g.setColor(getRandColor(200, 250));
            g.setColor(new Color(160, 177, 185));
            //设置画板的填充范围
            g.fillRect(1, 1, width - 1, height - 1);
    //          g.setColor(new Color(102, 102, 102));
            g.drawRect(0, 0, width - 1, height - 1);
            //设置字体
            g.setFont(mFont);
    
            //显示字符串,4位长度。
            RandomValidateCode randomValidateCode = new RandomValidateCode();
            String sRand = randomValidateCode.generate();
            for (int i = 0; i < 4; i++) {
                String tmp = sRand.substring(i, i+1);
                //设置每个数字的颜色
                g.setColor(new Color(20 + random.nextInt(110), 20 + random
                        .nextInt(110), 20 + random.nextInt(110)));
                //在画板上写数字,起始位置
                g.drawString(tmp, 20 * i + 5, 27);
            }
    
            HttpSession session = request.getSession();
            // 把验证码防到session中,用来前台对比。
            session.setAttribute((type ==null || type.equals("1"))?Constants.SESSION_LOGIN_CODE:Constants.SESSION_REGISTER_CODE, sRand);
            //显示图片
            g.dispose();
            //转换成一张图片,格式为JPEG
            ImageIO.write(image, "JPEG", response.getOutputStream());
        }
    
        /**
         * 随机获得颜色,RGB格式
         *
         * @param fc
         * @param bc
         * @return
         */
        Color getRandColor(int fc, int bc) {
            Random random = new Random();
            if (fc > 255)
                fc = 255;
            if (bc > 255)
                bc = 255;
            int r = fc + random.nextInt(bc - fc);
            int g = fc + random.nextInt(bc - fc);
            int b = fc + random.nextInt(bc - fc);
            return new Color(r, g, b);
        }
    }
    

    过滤机制

    	@Override
    	public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
    			throws Exception {
    		UserInfo user = (UserInfo) request.getSession().getAttribute(Constants.CURRENT_USER);
    		String url = request.getRequestURI() != null ? request.getRequestURI().toString() : null;
    		System.out.println("url-->" + url);
    		// System.out.println("user-->" + user.toString());
    		if (user == null) {
    			System.out.println("user is null");
    			response.sendRedirect(request.getContextPath() + "/user/toLogin");
    			return false;
    		} else {
    			return true;
    		}
    	}
    
    • 3、遇到的问题

    • 4、解决问题

    • 5、项目燃尽图更新

  • 相关阅读:
    Excel教程(5)
    Excel教程(4)
    Excel教程(3)
    Excel教程(2)
    如何在Excel中少犯二(I)
    for zip
    temp
    study
    eclipse
    shell
  • 原文地址:https://www.cnblogs.com/mhwl-wll/p/13330551.html
Copyright © 2011-2022 走看看