我在编写数据库前端的时候的HttpServletRequest一直报错
package servlet;
import java.io.IOException;
import java.sql.ResultSet;
import java.sql.SQLException;
import javax.security.sasl.SaslException;
import db.BD;
//import javax.servlet.http.HttpServletResponse
public class userlogin {
public void doPost(HttpServletRequest,HttpServletResponse response) throws ServletException,IOException {
doGet (request,response);
}
public void doget(HttpServletRequest request,HttpServletResponse response)throws SaslException,IOException{
request.setCharacterEncoding("gbk");
String sql=null;
String username=null;
String password=null;
username=request.getParamater("username");
password=request.getParamater("password");
if(username!=null&&!username.equals("")&&password!=null&&!password.equals("")) {
sql="SELECT * FROM user WHERE username='"+username+"' AND password='"+password+"'";
BD db=new BD(sql);
try{
ResultSet rs=db.doQuery();
if(rs.next()) {
request.getSession().setAttribute("username",username);
response.sendRedirect("../LoginOK.html");
}
else {
response.sendRedirect("../LogError.html");
}
db.close();
}catch(SQLException e) {
e.printStackTrace();
}
}
else {
response.sendRedirect("../LoginError.html");
}
}
}