Java 无法在JSP中的按钮提交操作上加载servlet

我有一个简单的

login.jsp

页面，如下所示：

<form class="form-horizontal" role="form" action="/SchoolERP/Login" method="post">
    <div class="form-group">
        <label for="username" class="control-label col-sm-1">Username:</label>
        <div class="col-sm-5">
            <input type="text" class="form-control" id="username" placeholder="Username">
        </div>
    </div>
    <div class="form-group">
        <label for="password" class="control-label col-sm-1">Password:</label>
        <div class="col-sm-5">
            <input type="password" class="form-control" id="password" placeholder="Password">
        </div>
    </div>
    <div class="col-sm-offset-1 col-sm-5">
        <button type="submit" class="btn btn-default">Submit</button>
    </div>
</form>

其中

ControllerLogin.java

如下所示：

public class ControllerLogin extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        RequestDispatcher rd = request.getRequestDispatcher("jsp/template.jsp");
        request.setAttribute("content_page", "admin/login.jsp");
        request.setAttribute("title", "Login");
        rd.forward(request, response);
    }

}

当我单击Login.jsp页面上的submit按钮时，它给出的错误是

请求的资源/SchoolERP/Login not found

。我哪里做错了

---

我在Login.jsp中尝试了各种变体，如

action=“Login”

。同样在

web.xml

中，我尝试使用

Login

，

/SchoolERP/Login

等，但仍然存在错误。

最终解决了它。我从

web.xml

中删除了

Login

定义，并将注释添加到

ControllerLogin

servlet中，作为

@WebServlet（{/Login}）

。这起作用了。但我仍然无法理解上面的代码哪里出错了

public class ControllerLogin extends HttpServlet {
    private static final long serialVersionUID = 1L;

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        RequestDispatcher rd = request.getRequestDispatcher("jsp/template.jsp");
        request.setAttribute("content_page", "admin/login.jsp");
        request.setAttribute("title", "Login");
        rd.forward(request, response);
    }

}