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

posted @ 2020-07-17 17:52  LemonTG  阅读(106)  评论(0编辑  收藏  举报