package com.demo.rest;

import javax.ws.rs.Consumes;
import javax.ws.rs.FormParam;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;


@Path("user")
public class UserResources {

UserDao dao=new UserDao();

@Path("verify")
@POST
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.MULTIPART_FORM_DATA)
public Response verify(@FormParam("username") String username, @FormParam("password")
String password) {

    Response res=new Response();
    userBean bean=dao.verify(username, password);
    if(bean.getUsername()==null) {
        res.setMessage("Username or password is incorrect");
        res.setStatus(false);
        return res;
    }
    else {
        res.setStatus(true);
        res.setMessage("You are logged in successfully");
        bean.getUsername();
        bean.getPassword();
        return res;
    }
}
}

package com.demo.rest;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;

public class UserDao {

public userBean verify(String username, String password) {

    userBean bean=new userBean();

    try {
        Connection con=DB.getCon();
        PreparedStatement ps=con.prepareStatement("select * from voterInfo where
                username=? AND password=?");

        ps.setString(1, username);
        ps.setString(2, password);

        ResultSet rs=ps.executeQuery();
        if(rs.next()) {
            bean.setUsername(rs.getString("username"));
            bean.setPassword(rs.getString("password"));
        }
        con.close();
    }
    catch(Exception e) {
        System.out.println(e);
    }
    return bean;
    }
}