我正在尝试在远程数据库上创建表，但是它没有对它进行任何查询。 实际上，当我输入错误的db密码时，它给了我一个错误，因此我认为它以某种方式正在连接但未序列化任何实体。
这是我的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>2.3.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.palmieri</groupId>
<artifactId>InstaPalm</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>InstaPalm</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>14</java.version>
</properties>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-parent -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.4.RELEASE</version>
<type>pom</type>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-actuator -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
<version>2.3.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>2.3.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>2.3.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
<version>2.3.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-jdbc -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jdbc</artifactId>
<version>2.3.4.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>8.0.21</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<version>2.3.4.RELEASE</version>
<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>
这是我的实体类用户
package com.palmieri.InstaPalm.entities;
import javax.persistence.*;
import java.io.Serializable;
import java.sql.Date;
import java.util.List;
@Entity
@Table(name = "photo")
public class Photo implements Serializable {
private static final long serialVersionUID = 6470094278127188729L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
@Column(name = "data", nullable = false)
private Date data;
@ManyToOne( fetch = FetchType.EAGER)
private User user;
@Column(name="link", nullable = false)
private String link;
@OneToMany(mappedBy = "photo", fetch = FetchType.EAGER)
private List<Like> likes;
@OneToMany(mappedBy = "photo", fetch = FetchType.EAGER)
private List<Comment> comments;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public Date getData() {
return data;
}
public void setData(Date data) {
this.data = data;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public String getLink() {
return link;
}
public void setLink(String link) {
this.link = link;
}
public List<Like> getLikes() {
return likes;
}
public void setLikes(List<Like> likes) {
this.likes = likes;
}
public List<Comment> getComments() {
return comments;
}
public void setComments(List<Comment> comments) {
this.comments = comments;
}
}
还有我的application.properties
## Database Properties
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.url = jdbc:mysql://sql2.freemysqlhosting.net:3306/XXX?useSSL=false
spring.datasource.username = XXXXX
spring.datasource.password = XXXXX
## Hibernate Properties
# The SQL dialect makes Hibernate generate better SQL for the chosen database
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5InnoDBDialect
spring.jpa.open-in-view=false
spring.jpa.show-sql=true
# Hibernate ddl auto (create, create-drop, validate, update)
spring.jpa.hibernate.ddl-auto = none
我确定我缺少某些配置或某些属性，但是我无法弄清楚哪个，或者我可能不匹配这些软件包？谢谢您的回复
编辑1 这是我的日志
2020-09-23 14:54:49.807 INFO 14620 --- [ restartedMain] c.p.InstaPalm.InstaPalmApplication : Starting InstaPalmApplication on SI-W-00446 with PID 14620 (C:\Users\SI2001\IdeaProjects\InstaPalm\InstaPalm\target\classes started by SI2001 in C:\Users\SI2001\IdeaProjects\InstaPalm\InstaPalm)
2020-09-23 14:54:49.809 INFO 14620 --- [ restartedMain] c.p.InstaPalm.InstaPalmApplication : No active profile set, falling back to default profiles: default
2020-09-23 14:54:49.809 DEBUG 14620 --- [ restartedMain] o.s.boot.SpringApplication : Loading source class com.palmieri.InstaPalm.InstaPalmApplication
2020-09-23 14:54:49.919 DEBUG 14620 --- [ restartedMain] o.s.b.c.c.ConfigFileApplicationListener : Loaded config file 'file:/C:/Users/SI2001/IdeaProjects/InstaPalm/InstaPalm/target/classes/application.properties' (classpath:/application.properties)
2020-09-23 14:54:49.921 DEBUG 14620 --- [ restartedMain] o.s.b.devtools.restart.ChangeableUrls : Matching URLs for reloading : [file:/C:/Users/SI2001/IdeaProjects/InstaPalm/InstaPalm/target/classes/]
2020-09-23 14:54:49.921 DEBUG 14620 --- [ restartedMain] o.s.b.d.settings.DevToolsSettings : Included patterns for restart : []
2020-09-23 14:54:49.921 DEBUG 14620 --- [ restartedMain] o.s.b.d.settings.DevToolsSettings : Excluded patterns for restart : [/spring-boot-starter-[\w-]+/, /spring-boot/(bin|build|out)/, /spring-boot-starter/(bin|build|out)/, /spring-boot-devtools/(bin|build|out)/, /spring-boot-actuator/(bin|build|out)/, /spring-boot-autoconfigure/(bin|build|out)/]
2020-09-23 14:54:49.922 INFO 14620 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2020-09-23 14:54:49.922 INFO 14620 --- [ restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2020-09-23 14:54:49.922 DEBUG 14620 --- [ restartedMain] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@4d5a23dd
2020-09-23 14:54:51.024 INFO 14620 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFERRED mode.
2020-09-23 14:54:51.046 INFO 14620 --- [ restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 14ms. Found 0 JPA repository interfaces.
2020-09-23 14:54:51.574 DEBUG 14620 --- [ restartedMain] .s.b.w.e.t.TomcatServletWebServerFactory : Code archive: C:\Users\SI2001\.m2\repository\org\springframework\boot\spring-boot\2.3.4.RELEASE\spring-boot-2.3.4.RELEASE.jar
2020-09-23 14:54:51.575 DEBUG 14620 --- [ restartedMain] .s.b.w.e.t.TomcatServletWebServerFactory : Code archive: C:\Users\SI2001\.m2\repository\org\springframework\boot\spring-boot\2.3.4.RELEASE\spring-boot-2.3.4.RELEASE.jar
2020-09-23 14:54:51.575 DEBUG 14620 --- [ restartedMain] .s.b.w.e.t.TomcatServletWebServerFactory : None of the document roots [src/main/webapp, public, static] point to a directory and will be ignored.
2020-09-23 14:54:51.641 INFO 14620 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2020-09-23 14:54:51.651 INFO 14620 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2020-09-23 14:54:51.651 INFO 14620 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.38]
2020-09-23 14:54:51.797 INFO 14620 --- [ restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2020-09-23 14:54:51.798 DEBUG 14620 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Published root WebApplicationContext as ServletContext attribute with name [org.springframework.web.context.WebApplicationContext.ROOT]
2020-09-23 14:54:51.798 INFO 14620 --- [ restartedMain] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1876 ms
2020-09-23 14:54:51.927 DEBUG 14620 --- [ restartedMain] o.s.b.w.s.ServletContextInitializerBeans : Mapping filters: filterRegistrationBean urls=[/*] order=-2147483647, characterEncodingFilter urls=[/*] order=-2147483648, formContentFilter urls=[/*] order=-9900, requestContextFilter urls=[/*] order=-105
2020-09-23 14:54:51.927 DEBUG 14620 --- [ restartedMain] o.s.b.w.s.ServletContextInitializerBeans : Mapping servlets: dispatcherServlet urls=[/]
2020-09-23 14:54:51.945 DEBUG 14620 --- [ restartedMain] o.s.b.a.m.w.servlet.WebMvcMetricsFilter : Filter 'webMvcMetricsFilter' configured for use
2020-09-23 14:54:51.945 DEBUG 14620 --- [ restartedMain] o.s.b.w.s.f.OrderedRequestContextFilter : Filter 'requestContextFilter' configured for use
2020-09-23 14:54:51.945 DEBUG 14620 --- [ restartedMain] s.b.w.s.f.OrderedCharacterEncodingFilter : Filter 'characterEncodingFilter' configured for use
2020-09-23 14:54:51.945 DEBUG 14620 --- [ restartedMain] o.s.b.w.s.f.OrderedFormContentFilter : Filter 'formContentFilter' configured for use
DEBUG StatusLogger org.slf4j.helpers.Log4jLoggerFactory is not on classpath. Good!
2020-09-23 14:54:52.109 INFO 14620 --- [ restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2020-09-23 14:54:52.147 INFO 14620 --- [ task-1] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [name: default]
2020-09-23 14:54:52.200 INFO 14620 --- [ task-1] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.21.Final
2020-09-23 14:54:52.355 INFO 14620 --- [ task-1] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.0.Final}
2020-09-23 14:54:52.361 DEBUG 14620 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerAdapter : ControllerAdvice beans: 0 @ModelAttribute, 0 @InitBinder, 1 RequestBodyAdvice, 1 ResponseBodyAdvice
2020-09-23 14:54:52.415 DEBUG 14620 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : 2 mappings in 'requestMappingHandlerMapping'
2020-09-23 14:54:52.446 DEBUG 14620 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Patterns [/webjars/**, /**] in 'resourceHandlerMapping'
2020-09-23 14:54:52.459 DEBUG 14620 --- [ restartedMain] .m.m.a.ExceptionHandlerExceptionResolver : ControllerAdvice beans: 0 @ExceptionHandler, 1 ResponseBodyAdvice
2020-09-23 14:54:52.463 INFO 14620 --- [ task-1] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2020-09-23 14:54:53.132 INFO 14620 --- [ task-1] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2020-09-23 14:54:53.153 INFO 14620 --- [ task-1] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL8Dialect
2020-09-23 14:54:53.364 DEBUG 14620 --- [ restartedMain] inMXBeanRegistrar$SpringApplicationAdmin : Application Admin MBean registered with name 'org.springframework.boot:type=Admin,name=SpringApplication'
2020-09-23 14:54:53.411 DEBUG 14620 --- [ restartedMain] o.s.b.d.livereload.LiveReloadServer : Starting live reload server on port 35729
2020-09-23 14:54:53.413 INFO 14620 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729
2020-09-23 14:54:53.419 INFO 14620 --- [ restartedMain] o.s.b.a.e.web.EndpointLinksResolver : Exposing 2 endpoint(s) beneath base path '/actuator'
2020-09-23 14:54:53.479 INFO 14620 --- [ restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2020-09-23 14:54:53.481 INFO 14620 --- [ restartedMain] DeferredRepositoryInitializationListener : Triggering deferred initialization of Spring Data repositories…
2020-09-23 14:54:53.482 INFO 14620 --- [ restartedMain] DeferredRepositoryInitializationListener : Spring Data repositories initialized!
2020-09-23 14:54:53.500 INFO 14620 --- [ restartedMain] c.p.InstaPalm.InstaPalmApplication : Started InstaPalmApplication in 4.246 seconds (JVM running for 5.36)
2020-09-23 14:54:53.506 DEBUG 14620 --- [ restartedMain] o.s.boot.devtools.restart.Restarter : Creating new Restarter for thread Thread[main,5,main]
2020-09-23 14:54:53.506 DEBUG 14620 --- [ restartedMain] o.s.boot.devtools.restart.Restarter : Immediately restarting application
2020-09-23 14:54:53.506 DEBUG 14620 --- [ restartedMain] o.s.boot.devtools.restart.Restarter : Created RestartClassLoader org.springframework.boot.devtools.restart.classloader.RestartClassLoader@1c3d316b
2020-09-23 14:54:53.506 DEBUG 14620 --- [ restartedMain] o.s.boot.devtools.restart.Restarter : Starting application com.palmieri.InstaPalm.InstaPalmApplication with URLs [file:/C:/Users/SI2001/IdeaProjects/InstaPalm/InstaPalm/target/classes/]
2020-09-23 14:54:54.064 INFO 14620 --- [ion(3)-10.8.2.7] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2020-09-23 14:54:54.064 INFO 14620 --- [ion(3)-10.8.2.7] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2020-09-23 14:54:54.064 DEBUG 14620 --- [ion(3)-10.8.2.7] o.s.web.servlet.DispatcherServlet : Detected StandardServletMultipartResolver
2020-09-23 14:54:54.071 DEBUG 14620 --- [ion(3)-10.8.2.7] o.s.web.servlet.DispatcherServlet : enableLoggingRequestDetails='false': request parameters and headers will be masked to prevent unsafe logging of potentially sensitive data
2020-09-23 14:54:54.072 INFO 14620 --- [ion(3)-10.8.2.7] o.s.web.servlet.DispatcherServlet : Completed initialization in 8 ms
答案 0 :(得分：0)
将createDatabaseIfNotExist=true添加到您的db.url
spring.datasource.url = jdbc:mysql://sql2.freemysqlhosting.net:3306/XXX useSSL=false&createDatabaseIfNotExist=true
答案 1 :(得分：0)
我认为您需要在application.properties/application.yml文件中使用以下配置：
<div id='boxA' class='box' :class="{boxRed : Aselected}" @click='change("A")'></div>
<div id='boxB' class='box' :class="{boxRed : Bselected}" @click='change("B")'></div>
<div id='boxC' class='box' :class="{boxRed : Cselected}" @click='change("C")'></div>答案 2 :(得分：0)
如果您希望Hibernate创建表，则应将application.property文件中的spring.jpa.hibernate.ddl-auto属性设置为无，以创建或更新。
__in答案 3 :(得分：0)
您可以通过添加此内容来实现自己的目的
spring.jpa.hibernate.ddl-auto = create
但是请记住，每次启动应用程序时，它将删除所有以前的表和数据。因此，为避免这种情况，只需将其更改为update
spring.jpa.hibernate.ddl-auto = update
答案 4 :(得分：0)
如果MySQL服务器中没有可用的数据库，最好先使用SQL命令创建一个空数据库。
然后运行以下应用程序，并将以下属性添加到application.properties文件中。
spring.jpa.hibernate.ddl-auto = update
因为update参数不会删除您的数据库并在每次重新启动时重新创建