📄 loginservlet.java
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package shop;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*;
import java.sql.*;
import javax.servlet.http.*;
/**
* Servlet implementation class for Servlet: loginServlet
*
*/
public class loginServlet extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
/* (non-Java-doc)
* @see javax.servlet.http.HttpServlet#HttpServlet()
*/
public loginServlet() {
super();
}
/* (non-Java-doc)
* @see javax.servlet.http.HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
*/
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
// TODO Auto-generated method stub
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out=response.getWriter();
HttpSession usersession=request.getSession(true);
String username=request.getParameter("username");
String userpassword=request.getParameter("userpassword");
Connection conn=DatabaseConn.getConnection();
if(conn==null) out.println("coon");
String sql = "SELECT * FROM user WHERE Name='"+username+"'";
Statement sm;
ResultSet rs;
boolean login=false;
try{
sm=conn.createStatement();
rs=sm.executeQuery(sql);
while(rs.next()){
rs.getString("Name");
if(rs.getString("Password").equals(userpassword))
login=true;
}
}catch(Exception e){
e.printStackTrace();
}
if(login==true){
if(username.equals("admin")){
usersession.setAttribute("isadmin", true);
usersession.setAttribute("islogin",true);
out.println("<html>");
out.println("<head><title>绠＄悊鍛樼櫥褰曟垚鍔⌨️ 快捷键说明
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