Spring应用程序不在Postgres数据库上创建表

Question

我已经尝试了StackOverflow中给出的许多解决方案，比如应用程序.properties中的一些更改、更改方言、设置模式等。我检查了数据库权限和用户/密码信息，一切正常。

spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true
spring.datasource.url= jdbc:postgresql://localhost:5432/produtosapirest
spring.datasource.username=postgres
spring.datasource.password=postgres
spring.jpa.generate-ddl=true
spring.jpa.hibernate.ddl-auto=update

<?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 http://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>2.1.4.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.produtos</groupId>
<artifactId>apirest</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>apirest</name>
<description>Demo project for Spring Boot</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>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.postgresql</groupId>
        <artifactId>postgresql</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>

package produtos.api.models;

import java.io.Serializable;
import java.math.BigDecimal;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="TB_PRODUTO")
public class Produto implements Serializable{

private static final long serialVersionUID = 1L;

@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long id;

private String nome;
private BigDecimal quantidade;
private BigDecimal valor;

public long getId() {
    return id;
}
public void setId(long id) {
    this.id = id;
}
public String getNome() {
    return nome;
}
public void setNome(String nome) {
    this.nome = nome;
}
public BigDecimal getQuantidade() {
    return quantidade;
}
public void setQuantidade(BigDecimal quantidade) {
    this.quantidade = quantidade;
}
public BigDecimal getValor() {
    return valor;
}
public void setValor(BigDecimal valor) {
    this.valor = valor;
}

}

 :: Spring Boot ::        (v2.1.4.RELEASE)

2019-04-11 10:21:00.011  INFO 16132 --- [  restartedMain] com.produtos.apirest.ApirestApplication  : Starting ApirestApplication on venancio-MS-7817 with PID 16132 (/home/brenorios/eclipse-workspace/apirest/target/classes started by brenorios in /home/brenorios/eclipse-workspace/apirest)
2019-04-11 10:21:00.014  INFO 16132 --- [  restartedMain] com.produtos.apirest.ApirestApplication  : No active profile set, falling back to default profiles: default
2019-04-11 10:21:00.077  INFO 16132 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : Devtools property defaults active! Set 'spring.devtools.add-properties' to 'false' to disable
2019-04-11 10:21:00.077  INFO 16132 --- [  restartedMain] .e.DevToolsPropertyDefaultsPostProcessor : For additional web related logging consider setting the 'logging.level.web' property to 'DEBUG'
2019-04-11 10:21:00.880  INFO 16132 --- [  restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data repositories in DEFAULT mode.
2019-04-11 10:21:00.901  INFO 16132 --- [  restartedMain] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 14ms. Found 0 repository interfaces.
2019-04-11 10:21:01.283  INFO 16132 --- [  restartedMain] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$84f3c51d] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2019-04-11 10:21:01.672  INFO 16132 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2019-04-11 10:21:01.698  INFO 16132 --- [  restartedMain] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2019-04-11 10:21:01.698  INFO 16132 --- [  restartedMain] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.17]
2019-04-11 10:21:01.778  INFO 16132 --- [  restartedMain] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2019-04-11 10:21:01.778  INFO 16132 --- [  restartedMain] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1701 ms
2019-04-11 10:21:01.988  INFO 16132 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2019-04-11 10:21:02.137  INFO 16132 --- [  restartedMain] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2019-04-11 10:21:02.178  INFO 16132 --- [  restartedMain] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2019-04-11 10:21:02.226  INFO 16132 --- [  restartedMain] org.hibernate.Version                    : HHH000412: Hibernate Core {5.3.9.Final}
2019-04-11 10:21:02.227  INFO 16132 --- [  restartedMain] org.hibernate.cfg.Environment            : HHH000206: hibernate.properties not found
2019-04-11 10:21:02.343  INFO 16132 --- [  restartedMain] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {5.0.4.Final}
2019-04-11 10:21:02.455  INFO 16132 --- [  restartedMain] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.PostgreSQL95Dialect
2019-04-11 10:21:02.659  INFO 16132 --- [  restartedMain] o.h.e.j.e.i.LobCreatorBuilderImpl        : HHH000421: Disabling contextual LOB creation as hibernate.jdbc.lob.non_contextual_creation is true
2019-04-11 10:21:02.663  INFO 16132 --- [  restartedMain] org.hibernate.type.BasicTypeRegistry     : HHH000270: Type registration [java.util.UUID] overrides previous : org.hibernate.type.UUIDBinaryType@3046a8a9
2019-04-11 10:21:02.834  INFO 16132 --- [  restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2019-04-11 10:21:02.852  INFO 16132 --- [  restartedMain] o.s.b.d.a.OptionalLiveReloadServer       : LiveReload server is running on port 35729
2019-04-11 10:21:03.042  INFO 16132 --- [  restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2019-04-11 10:21:03.087  WARN 16132 --- [  restartedMain] aWebConfiguration$JpaWebMvcConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2019-04-11 10:21:03.347  INFO 16132 --- [  restartedMain] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2019-04-11 10:21:03.349  INFO 16132 --- [  restartedMain] com.produtos.apirest.ApirestApplication  : Started ApirestApplication in 3.783 seconds (JVM running for 4.149)

package com.produtos.apirest;

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

@SpringBootApplication
public class ApirestApplication {

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

}

根据我下面的教程，这个设置应该导致在postgres数据库中创建表，但它没有发生。

Answer 1

你的问题可能就在这里，

spring.jpa.hibernate.ddl-auto=update

如果你在这里读到更多关于这一点的信息，你可以识别出，

例如，update操作将尝试添加新列、约束等，但永远不会删除以前可能存在但在以前运行时不再作为对象模型的一部分的列或约束。

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