hibernate 无法使用Spring Data JPA从javax.persistence导入@Entity注解

zkure5ic  于 2022-11-30  发布在  Spring
关注(0)|答案(1)|浏览(256)

所以我花了几个小时来解决这个问题,这真的很烦人。我用Spring Initializr生成了一个Sping Boot 项目:java 19,spring 3.0.0,maven,with mariadb driver,spring web,spring data jpa dependencies.问题是我创建了一个模型类Student后,无法从javax. persistence导入@Entity注解.我看的所有教程和视频,他们是从javax.persistence导入的,但是我只得到了jakarta. persistence。为什么?我试图为javax添加自己的依赖项。持久性,但是在我创建了带有所有注解(@Entity、@Table、@column)的模型后,表没有创建。
这里是我的文件:
pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>3.0.0</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>demo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo</name>
    <description>Demo project for Spring Boot</description>
    <properties>
        <java.version>19</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>org.mariadb.jdbc</groupId>
            <artifactId>mariadb-java-client</artifactId>
            <scope>runtime</scope>
        </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>

Student.class

package com.example.demo;

import jakarta.persistence.Entity;
import jakarta.persistence.Id;

@Entity(name = "student") // CAN'T GET FROM JAVAX.PERSISTENCE, SAME FOR ANNOTATIONS BELOW
public class Student {
    @Id
    @Column(name="id")
    private int id;
    @Column(name="name")
    private String name;
}

application.properties 位于src/main/resources中

spring.datasource.url=jdbc:mariadb://localhost:3307/db1
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.driver-class-name=org.mariadb.jdbc.Driver
spring.jpa.hibernate.ddl-auto=create-drop

入口点

package com.example.demo;

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

@SpringBootApplication
public class DemoApplication {

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

}

我做错了什么?

rkkpypqq

rkkpypqq1#

在最新版本的Sping Boot 中,javax库被替换为jakarta(更多详细信息请参见此处https://github.com/spring-projects/spring-boot/wiki/Spring-Boot-3.0.0-M1-Release-Notes)和此处https://spring.io/blog/2022/01/20/spring-boot-3-0-0-m1-is-now-available,因此您可以只找到jakarta。您可以继续使用它。

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