问题
Please help, i'm so hopeless. Although my application run without error but it still can't generate table:( There are my project structure:
this is file pom.xml
<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>
<groupId>sb</groupId>
<artifactId>sb</artifactId>
<version>1.0</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.5.9.RELEASE</version>
</parent>
<properties>
<mysql.version>8.0.13</mysql.version>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
This is class Application
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
this is class Entity
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table(name = "category")
public class CategoryEntity {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
@Column(name = "name")
private String name;
@Column(name = "code")
private String code;
}
This is file application.properties
server.port=8081
spring.datasource.url = jdbc:mysql://localhost:3306/springboot_database
spring.datasource.username = root
spring.datasource.password = hoa123456
spring.jpa.hibernate.ddl-auto = create-drop
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect
And it runs without error but it still can't generate table in database
2020-07-27 20:35:41.460 INFO 8352 --- [ main] sb.Application : Starting Application on DESKTOP-M8ASORT with PID 8352 (E:\java_hoapm\springbootproject\workspace\target\classes started by Lenovo in E:\java_hoapm\springbootproject\workspace)
2020-07-27 20:35:41.463 INFO 8352 --- [ main] sb.Application : No active profile set, falling back to default profiles: default
2020-07-27 20:35:41.508 INFO 8352 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@2bbaf4f0: startup date [Mon Jul 27 20:35:41 ICT 2020]; root of context hierarchy
2020-07-27 20:35:42.995 INFO 8352 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8081 (http)
2020-07-27 20:35:43.009 INFO 8352 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-07-27 20:35:43.010 INFO 8352 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.23
2020-07-27 20:35:43.139 INFO 8352 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-07-27 20:35:43.139 INFO 8352 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1634 ms
2020-07-27 20:35:43.287 INFO 8352 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2020-07-27 20:35:43.290 INFO 8352 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2020-07-27 20:35:43.291 INFO 8352 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2020-07-27 20:35:43.291 INFO 8352 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2020-07-27 20:35:43.292 INFO 8352 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
Loading class `com.mysql.jdbc.Driver'. This is deprecated. The new driver class is `com.mysql.cj.jdbc.Driver'. The driver is automatically registered via the SPI and manual loading of the driver class is generally unnecessary.
2020-07-27 20:35:44.143 INFO 8352 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2020-07-27 20:35:44.156 INFO 8352 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2020-07-27 20:35:44.263 INFO 8352 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.0.12.Final}
2020-07-27 20:35:44.264 INFO 8352 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2020-07-27 20:35:44.266 INFO 8352 --- [ main] org.hibernate.cfg.Environment : HHH000021: Bytecode provider name : javassist
2020-07-27 20:35:44.292 INFO 8352 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
2020-07-27 20:35:44.371 INFO 8352 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
2020-07-27 20:35:44.529 WARN 8352 --- [ main] o.h.b.i.SessionFactoryBuilderImpl : Unrecognized hbm2ddl_auto value : create-drop . Supported values include create, create-drop, update, and validate. Ignoring
2020-07-27 20:35:44.714 INFO 8352 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2020-07-27 20:35:45.006 INFO 8352 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@2bbaf4f0: startup date [Mon Jul 27 20:35:41 ICT 2020]; root of context hierarchy
2020-07-27 20:35:45.088 INFO 8352 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/new],methods=[DELETE]}" onto public void sb.api.NewsAPI.deleteNews(long[])
2020-07-27 20:35:45.089 INFO 8352 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/new],methods=[POST]}" onto public sb.DTO.NewsDTO sb.api.NewsAPI.createNews(sb.DTO.NewsDTO)
2020-07-27 20:35:45.089 INFO 8352 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/new],methods=[PUT]}" onto public sb.DTO.NewsDTO sb.api.NewsAPI.updateNews(sb.DTO.NewsDTO)
2020-07-27 20:35:45.091 INFO 8352 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2020-07-27 20:35:45.091 INFO 8352 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2020-07-27 20:35:45.124 INFO 8352 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-07-27 20:35:45.124 INFO 8352 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-07-27 20:35:45.163 INFO 8352 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2020-07-27 20:35:45.437 INFO 8352 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2020-07-27 20:35:45.494 INFO 8352 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8081 (http)
2020-07-27 20:35:45.498 INFO 8352 --- [ main] sb.Application : Started Application in 4.282 seconds (JVM running for 4.554)
回答1:
try to insert the bellow property in application.properties:
spring.jpa.generate-ddl=true
回答2:
Check this line in your application.properties and remove the right whitespaces
spring.jpa.hibernate.ddl-auto = create-drop
来源：https://stackoverflow.com/questions/63116577/cant-generate-table-from-entity-on-spring-boot