package odera.projects.appointmentssoftware.services; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import org.springframework.jdbc.core.JdbcTemplate; import java.util.Map; @Service public class UserService { @Autowired JdbcTemplate jdbcTemplate; public Long getUserId(String username, String password) { String query = "SELECT * FROM appcentral.user where username=\""+username+"\" AND password=\""+password+"\""; Map<String, Object> result = jdbcTemplate.queryForMap(query); if (result.isEmpty()) { return -1L; } else return (Long)result.get("user_id"); } }