小编ald*_*ing的帖子

每次进入服务类时，存储库似乎都不会自动装配，因为它会不断抛出NullPointerException。谁能帮我检查我想念的是什么？

这是我的代码：

DemoApplication.java

package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.orm.jpa.EntityScan;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
import org.springframework.stereotype.Controller;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Configuration
@EnableAutoConfiguration
@ComponentScan({"com.example", "com.controller", "com.repositories", "com.service", "com.model"})
@EntityScan(basePackages = {"com.model"})
@EnableJpaRepositories(basePackages = {"com.repositories"})
@EnableTransactionManagement
public class DemoApplication {

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

人.java

package com.model;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;

@Entity
public class Person {

    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    long id;

    String firstName;

    String lastName;

    public …