Ruby on Rails、Grails、Spring ROO、Spring App [已关闭]

自然语言生成技术是一种人工智能的应用，可以根据给定的输入生成相应的文章。本文将介绍四种流行的Web开发框架：Ruby on Rails、Grails、Spring ROO和Spring App，并提供一些案例代码来帮助读者更好地理解这些框架的使用。

ruby
class UsersController < ApplicationController
  def index
    @users = User.all
  end
  def show
    @user = User.find(params[:id])
  end
  def create
    @user = User.new(user_params)
    if @user.save
      redirect_to users_path
    else
      render 'new'
    end
  end
  def update
    @user = User.find(params[:id])
    if @user.update(user_params)
      redirect_to users_path
    else
      render 'edit'
    end
  end
  def destroy
    @user = User.find(params[:id])
    @user.destroy
    redirect_to users_path
  end
  private
  def user_params
    params.require(:user).permit(:name, :email, :password)
  end
end

groovy
class UserController {
  def index() {
    def users = User.list()
    render(view: 'index', model: [users: users])
  }
  def show() {
    def user = User.get(params.id)
    render(view: 'show', model: [user: user])
  }
  def create() {
    def user = new User(params)
    if (user.save()) {
      redirect(action: 'index')
    } else {
      render(view: 'new')
    }
  }
  def update() {
    def user = User.get(params.id)
    user.properties = params
    if (user.save()) {
      redirect(action: 'index')
    } else {
      render(view: 'edit')
    }
  }
  def delete() {
    def user = User.get(params.id)
    user.delete()
    redirect(action: 'index')
  }
}

java
@Controller
@RequestMapping("/users")
public class UserController {
  @Autowired
  private UserService userService;
  @GetMapping
  public String listUsers(Model model) {
    List users = userService.getAllUsers();
    model.addAttribute("users", users);
    return "users/list";
  }
  @GetMapping("/{id}")
  public String getUser(@PathVariable("id") Long id, Model model) {
    User user = userService.getUserById(id);
    model.addAttribute("user", user);
    return "users/show";
  }
  @PostMapping
  public String createUser(@ModelAttribute("user") User user) {
    userService.createUser(user);
    return "redirect:/users";
  }
  @PutMapping("/{id}")
  public String updateUser(@PathVariable("id") Long id, @ModelAttribute("user") User user) {
    user.setId(id);
    userService.updateUser(user);
    return "redirect:/users";
  }
  @DeleteMapping("/{id}")
  public String deleteUser(@PathVariable("id") Long id) {
    userService.deleteUser(id);
    return "redirect:/users";
  }
}

java
@Controller
@RequestMapping("/users")
public class UserController {
  @Autowired
  private UserService userService;
  @GetMapping
  public String listUsers(Model model) {
    List users = userService.getAllUsers();
    model.addAttribute("users", users);
    return "users/list";
  }
  @GetMapping("/{id}")
  public String getUser(@PathVariable("id") Long id, Model model) {
    User user = userService.getUserById(id);
    model.addAttribute("user", user);
    return "users/show";
  }
  @PostMapping
  public String createUser(@ModelAttribute("user") User user) {
    userService.createUser(user);
    return "redirect:/users";
  }
  @PutMapping("/{id}")
  public String updateUser(@PathVariable("id") Long id, @ModelAttribute("user") User user) {
    user.setId(id);
    userService.updateUser(user);
    return "redirect:/users";
  }
  @DeleteMapping("/{id}")
  public String deleteUser(@PathVariable("id") Long id) {
    userService.deleteUser(id);
    return "redirect:/users";
  }
}