Javaweb考试管理系统软件代码(主程序软件代码，需要添加程序功能描述)

由于Javaweb考试管理系统的软件代码较为复杂，无法一一列举，以下是一个简单的主程序软件代码，包含部分程序功能描述：

public class ExamSystem extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 处理get请求
        doPost(request, response);
    }

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        request.setCharacterEncoding("UTF-8");
        response.setContentType("text/html;charset=UTF-8");

        String action = request.getParameter("action");
        if (action == null) {
            // 默认操作
            action = "index";
        }

        switch (action) {
            case "index":
                // 首页
                showIndex(request, response);
                break;
            case "login":
                // 登录操作
                doLogin(request, response);
                break;
            case "logout":
                // 退出登录
                doLogout(request, response);
                break;
            case "register":
                // 注册操作
                doRegister(request, response);
                break;
            case "exam":
                // 考试操作
                doExam(request, response);
                break;
            case "submit":
                // 提交试卷
                doSubmit(request, response);
                break;
            case "result":
                // 查看成绩
                showResult(request, response);
                break;
            default:
                // 非法操作
                showError(request, response);
        }
    }

    private void showIndex(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 显示首页
        // ...
    }

    private void doLogin(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 处理登录操作
        // ...
    }

    private void doLogout(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 处理退出登录操作
        // ...
    }

    private void doRegister(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 处理注册操作
        // ...
    }

    private void doExam(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 处理考试操作
        // ...
    }

    private void doSubmit(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 处理提交试卷操作
        // ...
    }

    private void showResult(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 显示成绩
        // ...
    }

    private void showError(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // 显示错误页面
        // ...
    }
}

上面的代码是一个简单的Javaweb程序，主要是通过处理不同的action参数，调用不同的方法实现不同的功能。具体功能实现的代码需要根据具体需求进行编写。