Question

我尝试了几个版本但没有使用。我需要解决这个问题才能继续这个项目 hibernate没有在数据库中生成表，我找不到错误的位置。

代码是：

 <div id='maindiv'>
        <div id='dont want to remove'>
        </div>
 </div>

持久性是：

    package br.com.evolutionary.modelo;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

@Entity
public class Pokemon {

    @Id
    @GeneratedValue
    private Long id;

    @Column
    private String nome;

    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;
    }

}

pom.xml是：

<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<persistence-unit name="evolutionary"
    transaction-type="RESOURCE_LOCAL">
    <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
    <properties>
        <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
        <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/evolutionary" />
        <property name="hibernate.connection.driver" value="com.mysql.jdbc.Driver" />
        <property name="hibernate.connection.username" value="root" />
        <property name="hibernate.connection.password" value="12345" />
        <property name="hibernate.show_sql" value="true" />
        <property name="hibernate.format_sql" value="true" />
        <property name="hibernate.hbm2ddl.auto" value="update" />
    </properties>
</persistence-unit>

输出日志tomcat是：

<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>
    <groupId>br.com</groupId>
    <artifactId>evolutionary</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>
    <dependencies>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>6.0.2</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>5.1.0.Final</version>
        </dependency>
    </dependencies>
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

有人可以帮忙吗？

Answer 1

检查persistence.xml是否驻留在Meta-INF文件夹中。

在我猜的情况下，Persistence.xml没有在应用程序启动时加载。

同时检查您是否在代码中调用 Persistence.createEntityManagerFactory（persistantUnitName）。

请查看下面的Hibernate EntityManager文档，了解配置和引导的想法：

https://docs.jboss.org/hibernate/entitymanager/3.5/reference/en/html/configuration.html

尽管hibernate.hbm2ddl.auto = create，Hibernate也不会创建表

1 个答案: