Spring应用程序未在Postgres数据库上创建表

时间：2019-04-11 13:44:27

标签： spring postgresql hibernate spring-boot jdbc

Spring不在我的 Postgres数据库中的@Entity类中创建表。

我尝试了 StackOverflow 中此处提供的许多解决方案，例如对application.properties中的一些更改，更改了方言，设置了架构等。我已经检查了数据库权限以及用户/密码信息，一切都很好。

application.properties ： 
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
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 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>

Produto.java 
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;
}

}

终端： 
 :: 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)
ApirestApplication.java： 
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);
    }

}

根据我要遵循的教程，此设置应导致在postgres数据库中创建表，但不会发生。

4 个答案:

答案 0 :(得分：1)

我刚刚尝试了您的源代码，下面是日志：

2019-04-11 19:58:59.345  INFO 15520 --- [  restartedMain] org.hibernate.dialect.Dialect            : HHH000400: Using dialect: org.hibernate.dialect.PostgreSQL95Dialect
2019-04-11 20:02:42.971  INFO 15520 --- [  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 20:02:42.975  INFO 15520 --- [  restartedMain] org.hibernate.type.BasicTypeRegistry     : HHH000270: Type registration [java.util.UUID] overrides previous : org.hibernate.type.UUIDBinaryType@7893aaa9
2019-04-11 20:02:44.848  WARN 15520 --- [  restartedMain] o.h.engine.jdbc.spi.SqlExceptionHelper   : SQL Warning Code: 0, SQLState: 00000
2019-04-11 20:02:44.848  WARN 15520 --- [  restartedMain] o.h.engine.jdbc.spi.SqlExceptionHelper   : CREATE TABLE / PRIMARY KEY will create implicit index "tb_produto_pkey" for table "tb_produto"
2019-04-11 20:02:44.850  INFO 15520 --- [  restartedMain] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2019-04-11 20:02:44.863  INFO 15520 --- [  restartedMain] o.s.b.d.a.OptionalLiveReloadServer       : LiveReload server is running on port 35729
2019-04-11 20:02:45.067  INFO 15520 --- [  restartedMain] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2019-04-11 20:02:45.111  WARN 15520 --- [  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

您可以看到该表是在实例20：02：44.848上创建的。这是上一日志的2分钟之后。检查是否设置了@EnableAutoConfiguration。我已将其启用为@SpringBootApplication的一部分。

通过更改Application.java，直到看到打印的语句“完成---”：

package produtos.api;

import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

@SpringBootApplication
public class Application {

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

    @Bean
    public CommandLineRunner demo() {
        return (args) -> {
            System.out.println("Done---");
        };
    }
}

答案 1 :(得分：1)

您缺少Postgres方言。您可以尝试按以下方式在您的properties / yml文件中添加Postgres方言：

spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect

答案 2 :(得分：1)

您的问题可能就在这里，

spring.jpa.hibernate.ddl-auto=update

如果您详细了解此Here，则可以识别出来，

  

例如，update操作将尝试添加新的列，约束等，但绝不会删除以前可能已存在但不再作为先前运行的对象模型一部分的列或约束。

因此，根据您的要求，我建议您使用create或create-drop。

注意：

    每次您运行
  1. create和create-drop时都会创建数据库。因此，如果您不希望发生这种情况，请在创建数据库后将设置更改为update。
  2. 请勿在生产环境中使用此配置。

答案 3 :(得分：0)

我只是觉得这是一个愚蠢的错误。我的主程序包和模型程序包的名称结构不同，所以Spring没有得到我的模型程序包。

之前： com.produtosapirest2 com.produtosapi.models

之后： com.produtosapirest2 com.produtosapirest2.models

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