spring不能自动装配，这问题我在网上搜索了很久，但是都没有适合我的答案。
以下是报错信息

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userServiceImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private cat.dao.UserMapper cat.service.UserServiceImpl.userMapper; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [cat.dao.UserMapper] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: ...

    ... 61 more

目录结构：

UserController

  package cat.controller;

/**

1. javax.annotation.Resource;

2. javax.servlet.http.HttpServletRequest;

3. cat.domain.User;

4. cat.service.UserService;

5. org.apache.ibatis.annotations.Param;

6. org.springframework.beans.factory.annotation.Autowired;

7. org.springframework.stereotype.Controller;

8. org.springframework.ui.Model;

9. org.springframework.web.bind.annotation.PathVariable;

10. org.springframework.web.bind.annotation.RequestMapping;

    @Controller

11. class UserController {

       @Autowired
       private UserService userService;
    
       @RequestMapping(value = "/show/{id}")
       public String toIndex(@PathVariable("id") Integer id, Model model) {
           User user = userService.showUser(id);
           model.addAttribute("user", user);
           return "/showUser";
       }

    }

UserMapper:

package cat.dao;


import cat.domain.User;

public interface UserMapper {
    int deleteByPrimaryKey(Integer id);

    int insert(User record);

    int insertSelective(User record);

    User selectByPrimaryKey(Integer id);

    int updateByPrimaryKeySelective(User record);

    int updateByPrimaryKey(User record);
}

User:

package cat.domain;

public class User {
    private Integer id;

    private String userName;

    private String password;

    private Integer age;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName == null ? null : userName.trim();
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password == null ? null : password.trim();
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}

UserMapper.xml:

  
    
    
    
    
  
  
    id, user_name, password, age
  
    
        select *
        from user_t
        where id = #{id}
    
  
    delete from user_t
    where id = #{id,jdbcType=INTEGER}
  
  
    insert into user_t (id, user_name, password, 
      age)
    values (#{id,jdbcType=INTEGER}, #{userName,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR}, 
      #{age,jdbcType=INTEGER})
  
  
    insert into user_t
    
      
        id,
      
      
        user_name,
      
      
        password,
      
      
        age,
      
    
    
      
        #{id,jdbcType=INTEGER},
      
      
        #{userName,jdbcType=VARCHAR},
      
      
        #{password,jdbcType=VARCHAR},
      
      
        #{age,jdbcType=INTEGER},
      
    
  
  
    update user_t
    
      
        user_name = #{userName,jdbcType=VARCHAR},
      
      
        password = #{password,jdbcType=VARCHAR},
      
      
        age = #{age,jdbcType=INTEGER},
      
    
    where id = #{id,jdbcType=INTEGER}
  
  
    update user_t
    set user_name = #{userName,jdbcType=VARCHAR},
      password = #{password,jdbcType=VARCHAR},
      age = #{age,jdbcType=INTEGER}
    where id = #{id,jdbcType=INTEGER}
  




  

UserService:

package cat.service;

import cat.domain.User;
import org.springframework.stereotype.Repository;

/**
 * Created by on 16/4/9.
 */
public interface UserService {
    User showUser(int id);
}

UserServiceImpl:

package cat.service;


import cat.dao.UserMapper;
import cat.domain.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * Created by  on 16/4/9.
 */
@Service
public class UserServiceImpl {

    @Autowired
   private UserMapper userMapper;


    public User showUser(int id){
        return userMapper.selectByPrimaryKey(id);
    }
}

spring-mvc.xml:

    
    
    
    
        
            
                text/html;charset=UTF-8
            
        
    

    
    
        
        
        
    

    
    
        
        
        
        
        
        
    




    

spring-mybatis.xml:

这问题卡了挺久了，我知道就是某一处的小错误，不过就是找不出来=。=

UPDATE:

修改了配置文件：

启动成功，但是编译还是有红线。。。