java Tomcat 7请求的资源不可用

Question

我正在创建一个简单的注销屏幕，允许我注销一个web应用程序。我的JSP文件代码片段是：

<form action="Logout">
    Are you sure you want to logout?
    <input type="submit" name="logout" value="Yes">
</form>

我的注销类代码片段如下：

public class Logout extends HttpServlet {
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String strAnswer=request.getParameter("logout");
        if (strAnswer.equals("Yes")) {
            response.sendRedirect("index.jsp");
        }
    }
}

编辑：我的网站。xml代码段如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee    http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
     version="3.1">
   <display-name>ThisIsATest</display-name>
   <servlet>
        <description></description>
        <display-name>Logout</display-name>
        <servlet-name>Logout</servlet-name>
        <servlet-class>Logout</servlet-class>
   </servlet>
   <servlet-mapping>
        <servlet-name>Logout</servlet-name>
        <url-pattern>/Logout</url-pattern>
   </servlet-mapping>

</web-app>

当我按下Yes按钮时，我收到一条请求的resource is not available消息，路径为http://localhost:8080/Logout?logout=Yes。我有什么遗漏吗

Answer 1

事实证明，我在web中缺少用于注销的servlet和servlet映射。xml。这就解决了问题