[英]Can't see MYSQL table information in MYSQL workbench, spring Boot
我正在尝试将我的 spring 引导应用程序连接到 MYSQL 工作台,但我在 MYSQL 工作台中找不到我的任何列。
我的设置:这个 application.properties 文件
spring.datasource.url=jdbc:mysql://localhost:3306/blog?useUnicode=true&useLegacyDatetimeCode=false&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.hibernate.ddl-auto=create-drop
spring.jpa.show-sql=true
当我尝试不使用“?useUnicode=true&useLegacyDatetimeCode=false&serverTimezone=UTC”时,出现以下错误
HHH000342: Could not obtain connection to query metadata : The server time zone value 'EDT' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the 'serverTimezone' configuration property) to use a more specifc time zone value if you want to utilize time zone support.
我的 Maven 依赖项
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.0.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.blogportfolio</groupId>
<artifactId>blog</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>Bala's Blog</name>
<description>Blog portfolio backend</description>
<properties>
<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>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
文章 Class
package com.blogbackend.Model;
import com.sun.istack.NotNull;
import lombok.Getter;
import lombok.Setter;
import javax.persistence.*;
import java.util.Date;
@Entity
@Getter
@Setter
@Table (name = "Articles")
public class Article {
@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE)
private int id;
@NotNull
@Column(name="articleName")
private String artName;
@NotNull
@Column(name="articleBody")
private String artBody;
@NotNull
@Column(name="articleCategory")
private String artCategory;
@NotNull
@Column(name="articleCreated")
private Date artCreated;
@Column
private Author author;
public Article(int id) {
this.id = id;
}
}
您的Article
实体的身份生成策略是GenerationType.SEQUENCE
。 但是MySQL
不直接支持Sequence
。
这就是为什么当spring.jpa.hibernate.ddl-auto=create-drop
尝试创建模式时失败的原因。
将AUTO_INCREMENT
与GenerationType.IDENTITY
一起使用。
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