Question

I am using spring mvc3 now,and I found that most of my controller own the same logic. For exmaple:

PostController:

package com.king.controller;

@Controller
@RequestMapping("/posts")
public class PostController {
    @Autowired
    private PostDao postDao;

    // GET /posts /posts.json
    @RequestMapping(value = { "" }, method = RequestMethod.GET)
    public String index(Model model) {
        model.addAttribute("posts", postDao.list());
        return "posts/index";
    }

    // GET /posts/1 GET /posts/1.json
    @RequestMapping(value = "/{id}", method = RequestMethod.GET)
    public String show(@PathVariable int id, Model model) {
        Post post = postDao.query(id);
        if (post != null) {
            model.addAttribute("post", post);
            return "posts/show";
        } else
            throw new RuntimeException("not found");

    }

    // GET /posts/new
    @RequestMapping(value = "/new", method = RequestMethod.GET)
    public String newForm(Model model) {
        model.addAttribute(new Post());
        return "posts/new";
    }

    // GET /posts/1/edit
    @RequestMapping(value = "/{id}/edit", method = RequestMethod.GET)
    public String edit(@PathVariable int id, Model model) {
        Post post = postDao.query(id);
        if (post != null) {
            model.addAttribute(post);
            return "posts/edit";
        } else
            throw new RuntimeException("not found");
    }

    // POST /posts /posts.json
    @RequestMapping(value = "", method = RequestMethod.POST)
    public String create(@Valid Post post, BindingResult result) {
        if (!result.hasErrors()) {
            postDao.add(post);
            return "redirect:/posts";
        } else {
            return "posts/new";
        }
    }

    // PUT /posts/1 /posts/1.json
    @RequestMapping(value = "/{id}", method = RequestMethod.PUT)
    public String update(@PathVariable int id, @Valid Post post, BindingResult result, RedirectAttributes redirectAttrs) {
        if (!result.hasErrors()) {
            post.setId(id);
            postDao.update(post);
            return "redirect:/posts/" + id;
        } else {
            return "posts/edit";
        }
    }

    // DELETE /posts/1 /posts/1.json
    @RequestMapping(value = "/{id}", method = RequestMethod.DELETE)
    public String destroy(@PathVariable int id, RedirectAttributes re) {
        Post p = new Post(id, "", "");
        postDao.delete(p);
        return "redirect:/posts";
    }
}

If I create a new simple model which need the curd operation,I will have to create a new controller,a new dao which is copy-paste manually.

So I wonder if I can find or create a tool which can generate controller and dao and etc accordingly like rails does?

Is there any tool I can use out-of-box? If not,I can create it,however by now,I just thought that if I have to create this kind of tool,I may just do something character replacement,that’s to say,create a public template for controller and dao,then replace something accordingly,but I wonder how to handle the package/import/ problem,and which language is better (java or ruby)?

BTW,please do not recommend play!framework for me. I do not like it. Since I just want to use spring mvc. So the tool will only focus on controller and dao based on spring 3.

Any suggestion?

Answer 1

Grails certainly provides this type of functionality out of the box, while I believe Spring Roo also does this for you. It’s worth checking both out.