📄 managerlogin.java
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package servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import dataBase.DataBaseManager;
public class ManagerLogin extends HttpServlet {
/**
*
*/
private static final long serialVersionUID = -242440354971124964L;
DataBaseManager logindb;
/**
* Constructor of the object.
* @throws Exception
*/
public ManagerLogin() throws Exception {
super();
logindb = new DataBaseManager();
}
/**
* Destruction of the servlet. <br>
*/
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}
/**
* The doGet method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to get.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out
.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" This is ");
out.print(this.getClass());
out.println(", using the GET method");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to post.
*
* @param request the request send by the client to the server
* @param response the response send by the server to the client
* @throws ServletException if an error occurred
* @throws IOException if an error occurred
*/
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
request.setCharacterEncoding("GB2312");
String user = "";
String pw = "";
HttpSession loginsession = request.getSession();
if(request.getParameter("user") != null && request.getParameter("user") != "" &&
request.getParameter("pw") != null && request.getParameter("pw") != ""){
user= request.getParameter("user").trim();
pw= request.getParameter("pw").trim();
String[] loginre = logindb.validata(user,pw);
if(loginre != null){
loginsession.setAttribute("name",loginre[0]);
loginsession.setAttribute("id",loginre[1]);
loginsession.setAttribute("power",loginre[2]);
}else{
loginsession.setAttribute("wrong","用户名或者密码错误!");
}
}else{
loginsession.setAttribute("wrong","用户名或者密码不可为空!");
}
RequestDispatcher dispatcher = request.getRequestDispatcher("login.jsp");
dispatcher.forward(request,response);
}
/**
* Initialization of the servlet. <br>
*
* @throws ServletException if an error occure
*/
public void init() throws ServletException {
// Put your code here
}
}
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