Question

我刚收到错误404：请求的资源不可用。我无法弄清楚这里有什么问题：

这是xml：

<?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">
    <servlet>
        <servlet-name>servlet</servlet-name>
        <servlet-class>controller.Servlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>servlet</servlet-name>
        <url-pattern>/login</url-pattern>
    </servlet-mapping>
</web-app>

servlet：

[@WebServlet(name = "controller.Servlet")
public class Servlet extends HttpServlet {
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String id = request.getParameter("id");
        String password = request.getParameter("password");

        if (LoginService.authentication(id, password)) {
            response.sendRedirect("succes.jsp");
        } else {
            response.sendRedirect("index.jsp");
        }
        return;
    }][1]

index.jsp文件：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Login Page</title>
</head>
<body>
<form action="/login" method="post">
    Username: <input type="text" name="id" >
    <br>
    Password: <input type="password" name="password">
    <br>
    <input type="submit" value="submit">
</form>
</body>
</html>

succes.jsp：

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Login Succesfully</title>
</head>
<body>
    <h1>Login succesfully</h1>
</body>
</html>

这是文件夹结构： http://i.stack.imgur.com/ZGMH4.png

Answer 1

更新web.xml：

 <servlet>
            <servlet-name>controller.Servlet</servlet-name>
            <servlet-class>com..Servlet(replace with your servlet class namespace)</servlet-class>
    </servlet>

或者你可以像这样在@WebServlet中定义urlPatterns并从web.xml中删除servlet定义和url模式：

@WebServlet(name="controller.Servlet", urlPatterns={"/login"})
public class Servlet extends HttpServlet{
.......
}

的web.xml：

<?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">

</web-app>

Servlet响应发送重定向错误

1 个答案: