Question

我从TomCat收到一些错误请帮助..

org.springframework.beans.factory.UnsatisfiedDependencyException：使用名称＆＃39; userController创建bean的错误＆＃39;：通过字段＆＃39; userService＆＃39; 表达的不满意的依赖关系嵌套异常是org.springframework.beans.factory.UnsatisfiedDependencyException： 使用名称＆＃39; userServiceImpl＆＃39;创建bean时出错：通过字段“userDao＆＃39; 表示的不满意的依赖关系;嵌套异常是org.springframework.beans.factory.BeanCreationException： 使用名称＆＃39; userDAO＆＃39;创建bean时出错：bean的初始化失败; 嵌套异常是java.lang.AbstractMethodError

我的UserDAO

package dao;

import entities.User;
import org.springframework.data.repository.CrudRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface UserDAO extends CrudRepository<User, Integer> {
}

我的userserviceImpl

package service.impl;

import beans.UserBean;
import dao.UserDAO;
import entities.User;
import service.EntityBeanConverter;
import service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;


import java.util.List;
import java.util.Optional;

@Service
@Transactional
public class UserServiceImpl implements UserService {

    @Autowired
    private UserDAO userDao;

    @Autowired
    private EntityBeanConverter converter;

    @Override
    public Iterable<UserBean> getAllUsers() {
        Iterable<User> users = userDao.findAll();
        List<UserBean> beanList = converter.convertToBeanList(users, UserBean.class);

        return beanList;
    }

    @Override
    public UserBean getUserById(Integer userId) {
        Optional<User> user = userDao.findById(userId);
        UserBean bean = converter.convertToBean(user, UserBean.class);

        return bean;
    }

    @Override
    public void saveUser(UserBean user) {
        User userEntity = converter.convertToEntity(user, User.class);
        userDao.save(userEntity);
    }

    @Override
    public void deleteUser(Integer userId) {
        userDao.deleteById(userId);
    }
}

我的userController

package controller;

import beans.UserBean;
import service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

@Controller
class UserController {

    @Autowired
    private UserService userService;

    @RequestMapping("/users.html")
    public ModelAndView showUsersPage() {
        ModelAndView modelAndView = new ModelAndView("users");
        return modelAndView;
    }

    @RequestMapping("/update-user.html")
    public ModelAndView updateUser(@RequestParam(name = "user_id") Integer userId) {
        ModelAndView modelAndView = new ModelAndView("users");

        UserBean user = userService.getUserById(userId);
        modelAndView.addObject("user", user);

        return modelAndView;
    }

    @RequestMapping("/delete-user.html")
    public ModelAndView deleteUser(@RequestParam(name = "user_id") Integer userId) {
        userService.deleteUser(userId);

        ModelAndView modelAndView = new ModelAndView("redirect:users.html");
        return modelAndView;
    }

    @RequestMapping(value = "/save-user.html", method = RequestMethod.POST)
    public ModelAndView saveUser(UserBean user) {
        userService.saveUser(user);

        ModelAndView modelAndView = new ModelAndView("redirect:users.html");
        return modelAndView;
    }

    @ModelAttribute(name = "userList")
    private Iterable<UserBean> getUserList() {
        Iterable<UserBean> userList = userService.getAllUsers();
        return userList;
    }

    @ModelAttribute(name = "user")
    private UserBean getEmptyUser() {
        return new UserBean();
    }
}

我不知道在哪里可以找到我的错误问题，也许有人帮助我！

创建名称为bean的bean时出错，通过字段表示的不满意依赖性，bean的初始化失败;

0 个答案: