Question

我的UserController类：

package org.peronalitymeet.controller;

import org.peronalitymeet.entity.User;
import org.peronalitymeet.entity.request.AddUserRequest;
import org.peronalitymeet.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController
public class UserController {

    private UserRepository userRepository;

    @Autowired
    public UserController(UserRepository userRepository) {
        this.userRepository = userRepository;
    }

    @RequestMapping(value="/users", method = RequestMethod.GET)
    public List<User> findAllUsers(){
        return userRepository.findAll();
    }

    @RequestMapping(value="/signup", method = RequestMethod.POST)
    public void addUser(@RequestBody AddUserRequest addUserRequest){
        User user = new User();
        user.setFirstname(addUserRequest.getFirstname());
        user.setSurname(addUserRequest.getSurname());
        userRepository.save(user);
    }

}

我的问题是，现在如果我打开localhost：8080 / users URL，我将以JSON格式获得所有用户。以前我按照Spring mvc教程，在那里他们使用ModelAndView方法在调用URL时自动打开jsp页面。

有没有办法使用FindAll Users（）并同时打开一个jsp或html页面并列出该方法的结果？

Answer 1

@RestController是一个元注释，它告诉Spring返回它按原样返回给用户的文本。这相当于向您的班级添加@ResponseBody @Controller。

如果你想用JSP做一些事情，你的类应该看起来像我下面的内容。我只是在改变/users端点，但这个想法无处不在。

package org.peronalitymeet.controller;

import org.peronalitymeet.entity.User;
import org.peronalitymeet.entity.request.AddUserRequest;
import org.peronalitymeet.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.Controller;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;


import java.util.List;

@Controller
public class UserController {

    private UserRepository userRepository;

    @Autowired
    public UserController(UserRepository userRepository) {
        this.userRepository = userRepository;
    }

    @RequestMapping(value="/users", method = RequestMethod.GET)
    public ModelAndView findAllUsers(ModelAndView mav){
        List<User> users = userRepository.findAll();
        mav.addObject("users", users);
        mav.setViewName("users");
        return mav;
    }

    @ResponseBody
    @RequestMapping(value="/signup", method = RequestMethod.POST)
    public void addUser(@RequestBody AddUserRequest addUserRequest){
        User user = new User();
        user.setFirstname(addUserRequest.getFirstname());
        user.setSurname(addUserRequest.getSurname());
        userRepository.save(user);
    }

}

然后设置名为users.jsp的视图页面以显示users变量中的项目，您应该进行设置。

在ModelAndView中使用Jparepository＆lt; FindAll方法

1 个答案: