Question

我正在尝试使用JSP和servlet创建一个简单的登录页面。当我在输入admin和admin后点击登录按钮时，它会给我一个错误404并且不会打开success.jsp页面。

login.jsp和LoginController.java（servlet）的代码如下所示。请帮帮我。

PS：我正在使用mac和eclipse IDE。

的login.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<html>
<head>
<meta charset="ISO-8859-1">
<title>Insert title here</title>
</head>
<body>

<form action="LoginController" method="post">
Enter username :<input type="text" name="username"> <br>
Enter password :<input type="password" name="password"><br>
<input type="submit" value="Login">
</form>
</body>
</html>

LoginController.java

            import java.io.IOException;
            import javax.servlet.ServletException;
            import javax.servlet.http.HttpServlet;
            import javax.servlet.http.HttpServletRequest;
            import javax.servlet.http.HttpServletResponse;
            /**
             * Servlet implementation class LoginController
             */
            public class LoginController extends HttpServlet {

                protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
                    String un=request.getParameter("username");
                    String pw=request.getParameter("password");

                    if(un.equals("admin") && pw.equals("admin"))
                    {
                        response.sendRedirect("success.jsp");
                        return;
                    }
                    else
                    {
                        response.sendRedirect("error.html");
                        return;
                    }
                }
            }

的web.xml

    <?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
      <display-name>Login</display-name>
      <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
      </welcome-file-list>
    </web-app>

Servlet无法打开欢迎页面

0 个答案: