Class BoardController

ch4/BoardController3.java:15–130

import java.util.*;

@Controller
@RequestMapping("/board")
public class BoardController {
    @Autowired
    BoardService boardService;

    @PostMapping("/modify")
    public String modify(BoardDto boardDto, SearchCondition sc, RedirectAttributes rattr, Model m, HttpSession session) {
        String writer = (String)session.getAttribute("id");
        boardDto.setWriter(writer);

        try {
            if (boardService.modify(boardDto)!= 1)
                throw new Exception("Modify failed.");

            rattr.addFlashAttribute("msg", "MOD_OK");
            return "redirect:/board/list"+sc.getQueryString();
        } catch (Exception e) {
            e.printStackTrace();
            m.addAttribute(boardDto);
            m.addAttribute("msg", "MOD_ERR");
            return "board";
        }
    }

    @GetMapping("/write")
    public String write(Model m) {
        m.addAttribute("mode", "new");

        return "board";
    }

    @PostMapping("/write")
    public String write(BoardDto boardDto, RedirectAttributes rattr, Model m, HttpSession session) {
        String writer = (String)session.getAttribute("id");
        boardDto.setWriter(writer);

        try {
            if (boardService.write(boardDto) != 1)
                throw new Exception("Write failed.");

            rattr.addFlashAttribute("msg", "WRT_OK");
            return "redirect:/board/list";
        } catch (Exception e) {
            e.printStackTrace();
            m.addAttribute(boardDto);
            m.addAttribute("mode", "new");
            m.addAttribute("msg", "WRT_ERR");
            return "board";
        }
    }

    @GetMapping("/read")
    public String read(Integer bno, SearchCondition sc, RedirectAttributes rattr, Model m) {
        try {
            BoardDto boardDto = boardService.read(bno);
            m.addAttribute(boardDto);
        } catch (Exception e) {