no perfe + @DateTimeFormat
@Controller
public class PersonaController {

    @Autowired
    PeopleRepository peopleRepository;
    @Autowired
    MoviesRepository moviesRepository;
    @Autowired
    GenresRepository genresRepository;


    protected String listarConFiltro(Filtro filtro, Model model){
        List personas;
//        boolean mostrarReparto = false;
//        boolean mostrarTrabajos = false;
        if(filtro==null){
           filtro = new Filtro();
           personas = peopleRepository.findAll();
       } else if (filtro.getTipo().equalsIgnoreCase("reparto")) {
            personas = peopleRepository.findByCadenaYReparto(filtro.getCadena());
        }else {
            personas = peopleRepository.findByCadenaYTrabajos(filtro.getCadena());
        }
        model.addAttribute("personas", personas);
        model.addAttribute("filtro", filtro);
        return "personas";
    }

    @GetMapping("/")
    public String doListar(Model model){
        return listarConFiltro(null, model);
    }


    @GetMapping("https://dev.to/editar")
    public String doEditar(@RequestParam("id")Integer id, Model model){
        Movies pelicula = moviesRepository.findById(id).orElse(null);
        model.addAttribute("pelicula", pelicula);
        model.addAttribute("generos", genresRepository.findAll());

        return "pelicula";
    }

    @PostMapping("https://dev.to/guardar")
    public String doGuardar(@ModelAttribute("pelicula")Movies modelPelicula){
        Movies pelicula = moviesRepository.findById(modelPelicula.getId()).orElse(null);
        pelicula.setTitle(modelPelicula.getTitle());
        pelicula.setRuntime(modelPelicula.getRuntime());
        pelicula.setRevenue(modelPelicula.getRevenue());
        pelicula.setGenresList(modelPelicula.getGenresList());
        moviesRepository.save(pelicula);
        return "redirect:/";
    }

    @PostMapping("https://dev.to/filtrar")
    public String doFiltrar(@ModelAttribute("filtro")Filtro filtro, Model model){
//        List personas;
//        if(filtro.getTipo().equalsIgnoreCase("reparto")){
//            personas = peopleRepository.findByCadenaYReparto(filtro.getCadena());
//        }else{
//            personas = peopleRepository.findAll();
//        }
//        model.addAttribute("filtro", filtro);
//        model.addAttribute("personas", personas);
        //return "personas";
        return listarConFiltro(filtro, model);
    }
}

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ page import="es.taw.movies.entity.People" %>
<%@ page import="java.util.List" %>
<%@ page import="es.taw.movies.entity.MovieCast" %>
<%@ page import="es.taw.movies.entity.MovieCrew" %>
<%@ page import="es.taw.movies.ui.Filtro" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>


<%
    String title = "Listado de personas";
    List personas = (List) request.getAttribute("personas");
    Filtro filtro = (Filtro) request.getAttribute("filtro");
    boolean mostrarReparto = filtro.getTipo().isBlank() || filtro.getTipo().equalsIgnoreCase("reparto");
    boolean mostrarTrabajador = filtro.getTipo().isEmpty() || "trabajador".equalsIgnoreCase(filtro.getTipo());
%>


    


<%=title%>


    
     

    y contiene:  Filtrar Borrar Filtro




<%
    if(mostrarReparto){
%>
        
<%
    }

    if(mostrarTrabajador){
%>
        
<%
    }
%>
    
<%
for(People p: personas){
%>
    
<%
    if(mostrarReparto){
%>
        
<%
    }

    if(mostrarTrabajador){
%>
        
<%
    }
%>
    
<%
}
%>


    

        
NOMBRE
PELÍCULAS - PERSONAJES
PELÍCULAS - CARGOS

        

            <%=p.getName()%>
        

    <%
        for(MovieCast cast : p.getMovieCastList()){
    %>
             <%=cast.getMovieId().getTitle()%>  - <%=cast.getCharacterName()%> 

    <%
        }
    %>
        

    <%
        for(MovieCrew crew : p.getMovieCrewList()){
    %>
             <%=crew.getMovieId().getTitle()%>  - <%=crew.getJob()%> 

    <%
        }
    %>
        

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@ page import="es.taw.movies.entity.People" %>
<%@ page import="java.util.List" %>
<%@ page import="es.taw.movies.entity.MovieCast" %>
<%@ page import="es.taw.movies.entity.MovieCrew" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>


<%
    String title = "Ficha de la película";
%>


    


<%=title%>


    
            

        

            
Título:
            

        
        

            
Duración:
            

        
        

            
Recaudación:
            

        
        

            
Generos:
            

        
    
    Guardar

public interface PeopleRepository extends JpaRepository {

    @Query("select p from People p join p.movieCastList cast where cast.characterName like concat('%',:cadena,'%') ")
    public List findByCadenaYReparto(@Param("cadena")String cadena);

    @Query("select p from People p join p.movieCrewList crew where crew.job like concat('%',:cadena,'%') ")
    public List findByCadenaYTrabajos(@Param("cadena")String cadena);
}

package es.taw.movies.ui;

import lombok.Data;

@Data
public class Filtro {
    String cadena;
    String tipo="";
}