Spring JPA自动创建表失败

我对 Spring JPA、Hibernate、MySQL 有疑问。 我有一个实体（Nom.java）和存储库（公共接口 NomRepository 扩展 JpaRepository）。它们的创建和注入都很好。

问题是，当我尝试通过存储库的保存方法保存记录时，spring 抱怨“表''不存在”。 事实上我在 MySQL 中没有看到这个表。您尝试了 hibernate.hbm2ddl.auto 的不同值，但没有帮助。

顺便说一句，我使用无 XML 配置。

这是配置文件：

    package ru.interosite.awp.config;
    
    import java.util.Properties;
    import javax.sql.DataSource;
    import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
    import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.ComponentScan;
    import org.springframework.context.annotation.Configuration;
    import org.springframework.data.jpa.repository.config.EnableJpaRepositories;
    import org.springframework.jdbc.datasource.DriverManagerDataSource;
    import org.springframework.orm.jpa.JpaVendorAdapter;
    import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
    import org.springframework.orm.jpa.vendor.Database;
    import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
    
    @Configuration
    @ComponentScan("ru.interosite.awp")
    @EnableAutoConfiguration
    public class AppConfiguration {
    
        @Bean
        public DataSource dataSource() {
            DriverManagerDataSource dataSource = new DriverManagerDataSource();
            dataSource.setDriverClassName("com.mysql.jdbc.Driver");
            dataSource.setUrl("jdbc:mysql://localhost:3306/awp");
            dataSource.setUsername("root");
            dataSource.setPassword("password");
            return dataSource;
        }
    
        @Bean
        public LocalContainerEntityManagerFactoryBean entityManagerFactory(DataSource dataSource, JpaVendorAdapter jpaVendorAdapter) {
            LocalContainerEntityManagerFactoryBean lef = new LocalContainerEntityManagerFactoryBean();
            lef.setPersistenceUnitName("my_pu");
            lef.setPackagesToScan("ru.interosite.awp.data");
            lef.setDataSource(dataSource);
            lef.setJpaVendorAdapter(jpaVendorAdapter);
            lef.setJpaProperties(getJpaProperties());
            return lef;
        }
    
        @Bean
        public JpaVendorAdapter jpaVendorAdapter() {
            HibernateJpaVendorAdapter jpaVendorAdapter = new HibernateJpaVendorAdapter();
    
            jpaVendorAdapter.setDatabase(Database.MYSQL);
            jpaVendorAdapter.setGenerateDdl(true);
            jpaVendorAdapter.setShowSql(true);
            jpaVendorAdapter.setDatabasePlatform("org.hibernate.dialect.MySQL5Dialect");
    
            return jpaVendorAdapter;
        }
    
        private Properties getJpaProperties() {
            return new Properties() {
                {
                    setProperty("hibernate.hbm2ddl.auto", "update");
                    setProperty("hibernate.dialect", "org.hibernate.dialect.MySQL5Dialect");
                    setProperty("hibernate.show_sql", "true");
                    setProperty("hibernate.format_sql", "true");
                }
            };
        }
    }

以下是我启动应用程序的方法：

    package ru.interosite.awp;
    
    import java.awt.Font;
    import javax.swing.UIManager;
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.boot.SpringApplication;
    import org.springframework.context.ApplicationContext;
    import ru.interosite.awp.config.AppConfiguration;
    import ru.interosite.awp.gui.UIUtils;
    
    public class Boot {
    
        private static final Logger LOGGER = LoggerFactory.getLogger(Boot.class);
        
        public static void main( String[] args )
        {
            
            UIUtils.setUIFont(new javax.swing.plaf.FontUIResource(Font.SANS_SERIF, Font.PLAIN, 16));
            
            try {
                String lafClassName = UIManager.getSystemLookAndFeelClassName();
                UIManager.setLookAndFeel(lafClassName);
            } catch (Exception e) {
                LOGGER.debug(e.getMessage());
            }        
            
            ApplicationContext ctx = SpringApplication.run(AppConfiguration.class, args);
            ((Runner)ctx.getBean("runner")).start();
        }    
    }

这是我的 pom.xml：

 
<?xml version="1.0" encoding="UTF-8"?>
<project
    xmlns="http://maven.apache.org/POM/4.0.0" 
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <modelVersion>4.0.0</modelVersion>
    <groupId>ru.interosite</groupId>
    <artifactId>AWP</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>
    <name>AWP</name>
    <url>http://maven.apache.org</url>
    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <start-class>ru.interosite.awp.Runner</start-class>
    </properties>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>0.5.0.M4</version>
    </parent>
    <dependencies>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.26</version>
        </dependency>
        <dependency>
            <groupId>org.mockito</groupId>
            <artifactId>mockito-all</artifactId>
            <version>1.9.5</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>2.3.2</version>
            </plugin>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>
    <repositories>
        <repository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>http://repo.spring.io/libs-snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>http://repo.spring.io/libs-milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
        <repository>
            <id>org.jboss.repository.releases</id>
            <name>JBoss Maven Release Repository</name>
            <url>https://repository.jboss.org/nexus/content/repositories/releases</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>
    <pluginRepositories>
        <pluginRepository>
            <id>spring-snapshots</id>
            <name>Spring Snapshots</name>
            <url>http://repo.spring.io/libs-snapshot</url>
            <snapshots>
                <enabled>true</enabled>
            </snapshots>
        </pluginRepository>
        <pluginRepository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>http://repo.spring.io/libs-milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </pluginRepository>
    </pluginRepositories>
</project>

您需要更改两个方法并删除 getProperties() 方法：

@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactory(
        DataSource dataSource, JpaVendorAdapter jpaVendorAdapter) {
    LocalContainerEntityManagerFactoryBean lef = new LocalContainerEntityManagerFactoryBean();
    lef.setDataSource(dataSource);
    lef.setJpaVendorAdapter(jpaVendorAdapter);
    lef.setPackagesToScan("com.spring.domain");
    return lef;
}

@Bean
public JpaVendorAdapter jpaVendorAdapter() {
    HibernateJpaVendorAdapter hibernateJpaVendorAdapter = new HibernateJpaVendorAdapter();
    hibernateJpaVendorAdapter.setShowSql(true);
    hibernateJpaVendorAdapter.setGenerateDdl(true); //Auto creating scheme when true
    hibernateJpaVendorAdapter.setDatabase(Database.H2);//Database type
    return hibernateJpaVendorAdapter;
}

重点是：

hibernateJpaVendorAdapter.setGenerateDdl(true);