导致spring boot应用程序异常的Autowired

Question

我很难让Autowired注释在我的spring boot应用程序中工作。

我也无法在包之外运行main方法。有什么建议吗？

package com.xxx.controller;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.builder.SpringApplicationBuilder;
import org.springframework.boot.context.web.SpringBootServletInitializer;

@SpringBootApplication
public class SampleWebJspApplication extends SpringBootServletInitializer {

    @Override
    protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
        return application.sources(SampleWebJspApplication.class);
    }

    public static void main(String[] args) throws Exception {
        SpringApplication.run(SampleWebJspApplication.class, args);
    }

}

UserService类

package com.xxx.service;

    import java.util.List;

    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;

    import com.xxx.entity.User;
    import com.xxx.repository.UserRepository;

    @Service
    public class UserService {

        @Autowired
        private UserRepository userRepository;

        public List<User> findAll() {
            return userRepository.findAll();
        }

    }

UserRepository类

package com.xxx.repository;

import org.springframework.data.jpa.repository.JpaRepository;

import com.xxx.entity.User;

public interface UserRepository extends JpaRepository<User, Integer> {

}

Answer 1

这可能有两个原因：

@componentscan包中不包括组件的
• 包。
@enablejparepositories包中不包括存储库的
• 包。