我是springboot的新手，我已经用springboot创建了一个多模块项目（maven）。我创建了一些restapi并连接到h2数据库。数据库已成功连接并能够在localhost中运行。
这是我的项目树。。用户管理是父模块和核心模块，serverapi是子模块。我为每个模块创建了包，并添加了相关的类。
我已经尝试了我所知道的一切，在谷歌上搜索了5天，但没有任何效果。我已经包括了我在这里写的每一个代码。请帮我找出问题所在(我正在使用intellij idea 2020.3（终极版）

用户.java

package com.hms.usermanagement.core.model;
import javax.persistence.*;

@Entity
@Table(name = "users")
public class User {

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

@Column(name = "full_name")
private String fullName;

@Column(name = "email")
private String email;

public User() {
}

public User(long id, String fullName, String email) {
    this.id = id;
    this.fullName = fullName;
    this.email = email;
}

public long getId() {
    return id;
}

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

public String getFullName() {
    return fullName;
}

public void setFullName(String fullName) {
    this.fullName = fullName;
}

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}}

用户存储库

package com.hms.usermanagement.core.repository;

import com.hms.usermanagement.core.model.User;
import org.springframework.data.jpa.repository.JpaRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface UserRepository extends JpaRepository<User,Long> {
 }

应用

package com.hms.usermanagement.serverAPI.application;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class Application {
    public static void main(String[] args){
        SpringApplication springApplication = new SpringApplication(Application.class);
        springApplication.run(args);
}}

用户控制器

package con.hms.usermanagement.serverAPI.controller;

import com.hms.usermanagement.core.model.User;
import com.hms.usermanagement.core.repository.UserRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;

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

@RestController
@RequestMapping("/api")
public class UserController {

@Autowired
private UserRepository userRepository;

//Create Users
@PostMapping("/user")
public User createUser( @Validated @RequestBody User user){
    return userRepository.save(user);
}

//View all Users
@GetMapping("/users")
public List<User> getAllUsers(){
    return userRepository.findAll();
}

//Update Users
@PutMapping("/users/{id}")
public ResponseEntity <User> updateUser(@PathVariable(value = "id") long userId , @RequestBody User userDetails){
    Optional<User> user = userRepository.findById(userId);
    if(user.isPresent()){
        User _user = user.get();
        _user.setFullName(userDetails.getFullName());
        _user.setEmail(userDetails.getEmail());
        return new ResponseEntity<>(userRepository.save(_user), HttpStatus.OK);
    }else {
        return new ResponseEntity<>(HttpStatus.NOT_FOUND);
    }
}

//Delete Users
@DeleteMapping("/users/{id}")
public ResponseEntity<?> deleteUser(@PathVariable(value = "id") long userId){
    userRepository.findById(userId);
    userRepository.deleteById(userId);
    return ResponseEntity.ok().build();
}

应用程序属性

spring.datasource.url=jdbc:h2:~/test
spring.datasource.driver-class-name=org.h2.Driver
spring.datasource.username=
spring.datasource.password=
spring.jpa.database-platform=org.hibernate.dialect.H2Dialect

# enable H2 console

spring.h2.console.enabled=true

# custom H2 console

spring.h2.console.path=/h2

架构-h2.sql

CREATE TABLE users (id long PRIMARY KEY AUTO_INCREMENT, full_name VARCHAR(30), email VARCHAR(50));

我试过使用这两个网址


即使“id”字段是自动生成的，但我试图添加id也使用 Postman 。。但仍然得到同样的错误