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我一直有空指針錯(cuò)誤?我找不到原因了..應(yīng)該是SERVLET那邊錯(cuò)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");

}

}


}


正在回答

1 回答

你的username拼錯(cuò)了,在這一行String username=request.getParameter("usernmae");

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JAVA遇見(jiàn)HTML——Servlet篇
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我一直有空指針錯(cuò)誤?我找不到原因了..應(yīng)該是SERVLET那邊錯(cuò)了.

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