controller.Crud.java Source code

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Here is the source code for controller.Crud.java

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package controller;

import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.validation.Valid;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;
import pojo.Hallo;
import source.Config;

/**
 *
 * @author L
 */
@Controller
public class Crud extends WebMvcConfigurerAdapter {
    @Autowired
    Config config;

    @RequestMapping(method = RequestMethod.GET, value = "/show")
    public ModelAndView show() {
        List<Hallo> hallos = config.tampilSemua();
        return new ModelAndView("crud/index", "isi", hallos);
    }

    @RequestMapping(value = "/tambahdata", method = RequestMethod.GET)
    public ModelAndView tambah() {
        return new ModelAndView("crud/tambah", "command", new Hallo());
    }

    @RequestMapping(value = "/tambahdata", method = RequestMethod.POST)
    public ModelAndView simpan(@Valid @ModelAttribute("hallo") Hallo hallo, BindingResult result) {
        if (result.hasErrors()) {
            ModelAndView modelAndView = new ModelAndView("crud/tambah");
            modelAndView.addObject("command", new Hallo());
            modelAndView.addObject("error", result.getAllErrors());
            return modelAndView;
        } else {
            config.tambahData(hallo);
            return new ModelAndView("redirect:show");
        }
    }

    @RequestMapping(value = "/hapus/{id}", method = RequestMethod.GET)
    public ModelAndView hapus(@PathVariable("id") String id) {
        config.hapus(id);
        return new ModelAndView("redirect:/show");
    }

    @RequestMapping(value = "/edit/{id}", method = RequestMethod.GET)
    public ModelAndView edit(@PathVariable("id") String id) {
        Hallo h = config.mahasiswa(id);
        ModelAndView andView = new ModelAndView("crud/edit");
        andView.addObject("command", h);
        andView.addObject("id", id);
        return andView;
    }

    @RequestMapping(value = "/edit/{id}", method = RequestMethod.POST)
    public ModelAndView update(@Valid @ModelAttribute("hallo") Hallo hallo, BindingResult result,
            @PathVariable("id") String id) {
        if (result.hasErrors()) {
            ModelAndView modelAndView = new ModelAndView("crud/edit");
            modelAndView.addObject("command", hallo);
            modelAndView.addObject("id", id);
            modelAndView.addObject("error", result.getAllErrors());
            return modelAndView;
        } else {
            config.simpanUpdate(hallo);
            return new ModelAndView("redirect:/show");
        }
    }
}