无法使用jpa+spring boot创建表

Question

我正在尝试使用JPA生成表。但我不能创建它。代码中没有错误，但似乎有配置错误。但是我找不到它，我尝试了很多配置，但是什么也没有发生。非常感谢。

这是application.property

spring.datasource.url=jdbc:mysql://localhost:3306/springapp
spring.datasource.username= root
spring.datasource.password= me
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.jpa.hibernate.ddl-auto=create

这是我的班级：

@Entity
public class Customer {

    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private int id;
    private String name;
    private String phone;

    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getPhone() {
        return phone;
    }
    public void setPhone(String phone) {
        this.phone = phone;
    }
    public Customer(String name, String phone) {
        super();
        this.name = name;
        this.phone = phone;
    }
    public Customer() {
        super();
    }
}

这是应用程序：

@SpringBootApplication
public class Application {

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

这是控制器：

@RestController @RequestMapping("/customer")公共类CustomerController { @Autowired customerRepository；

@RequestMapping("/findall")
@ResponseBody
public List<Customer> findAll() {
    return customerRepository.findAll();
}

}

Pom.xml

    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>GStock-3</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>GStock-3</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.9.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
    <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
</project>

Answer 1

尝试添加@EntityScan

@EntityScan("<package with entities>")
@SpringBootApplication 
public class Application { ... }

Answer 2

根据目前的信息，我有几个建议/问题可能会对你有所帮助：

• 在MySQL
• 中，“MySQL”数据库是否存在分配了正确的用户(根用户)和密码(me)？
• 我在代码中看不到@存储库定义，例如

@存储库公共接口CustomerRepository扩展了JpaRepository{}

Answer 3

在您的mysql上执行以下命令：

mysql>创建数据库db_example；--创建新数据库

mysql>创建由‘ThePassword’标识的用户'springuser'@'localhost‘；--创建用户

mysql> grant all on localhost to 'springuser'@'localhost'；--将所有权限授予新创建的数据库上的新用户

并添加到application.xml中

spring.jpa.hibernate.ddl-auto=create
spring.datasource.url=jdbc:mysql://localhost:3306/db_example
spring.datasource.username=springuser
spring.datasource.password=ThePassword

或

你可以通过this link