字段需要找不到类型的bean。

Question

结构没有问题。spring boot可以扫描UserMapper，但不能扫描UserService。我试着给我的UserService@Mapper组件，然后它就可以被扫描了。但我不知道如何使用其他方法进行扫描。我尝试了@服务，但不起作用。

package com.mywebprojet.springboot;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class MywebprojectApplication {
        public static void main(String[] args) {
        SpringApplication.run(MywebprojectApplication.class, args);
    }
}

package com.mywebprojet.springboot.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
import com.mywebprojet.springboot.entity.User;
import com.mywebprojet.springboot.mapper.UserMapper;
import com.mywebprojet.springboot.service.UserService;
@RestController
@RequestMapping(value = "user")
public class UserController {
    @Autowired
    private UserMapper userMapper;
    @Autowired
    private UserService userService;
}



package com.mywebprojet.springboot.service;
import java.util.List;
import org.springframework.stereotype.Service;
import com.mywebprojet.springboot.entity.User;
@Service
public interface UserService{
    void insert(User user);
}

Answer 1

您应该编写一个UserService实现，并用@Service而不是接口对其进行注释。例如：

@Service
public class UserServiceImpl implements UserService {

@Override
public void insert(User user) {
    // Implementation
}

}在此处输入代码