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我一直有空指针错误?我找不到原因了..应该是SERVLET那边错了.


package servlet;


import java.io.IOException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;


import com.po.Users;


/**

 * Servlet implementation class loginServlet

 */


public class loginServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

       

    /**

     * @see HttpServlet#HttpServlet()

     */

    public loginServlet() {

        super();

        // TODO Auto-generated constructor stub

    }


/**

* @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)

*/

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

// TODO Auto-generated method stub

doPost(request,response);

}


/**

* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

*/

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

// TODO Auto-generated method stub

Users u=new Users();

String username=request.getParameter("usernmae");

String password=request.getParameter("password");

u.setUsername(username);

u.setPassword(password); 

request.getSession().setAttribute("loginUser", u);

if(u.getUsername().equals("admin")&&u.getPassword().equals("admin")){

response.sendRedirect(request.getContextPath() + "/login_success.jsp");

}else {

response.sendRedirect(request.getContextPath() + "/login_falure.jsp");

}

}


}


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1 回答

你的username拼错了,在这一行String username=request.getParameter("usernmae");

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我一直有空指针错误?我找不到原因了..应该是SERVLET那边错了.

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