【发布时间】：2017-11-02 12:22:14
【问题描述】：
我已经从 Hibernate 4.3 更新到最新版本，目前是 5.2.10.Final。
我需要 maven 来生成 ddl 模式，这样当我运行 drop 数据库然后创建模式时，它将获取生成的 schmea，我试图在 maven 中运行 ant 任务。在我以前的版本中，我使用...
<groupId>org.codehaus.mojo</groupId>
<artifactId>hibernate3-maven-plugin</artifactId>
<version>2.2</version>
我已按照here 中的说明进行操作，因此在我的 pom.xml 中，我现在拥有以下内容...
<plugin>
<artifactId>maven-antrun-plugin</artifactId>
<version>1.7</version>
<executions>
<execution>
<id>generate-ddl-create</id>
<phase>generate-sources</phase>
<configuration>
<target name="schemaexport" depends="build-demo" description="Exports a generated schema to DB and file">
<taskdef
name="hibernatetool"
classname="org.hibernate.tool.ant.HibernateToolTask"
classpathref="maven.dependency.classpath"
/>
<hibernatetool destdir=".">
<classpath>
<path location="src/main/java"/>
</classpath>
<jpaconfiguration persistenceunit="randb_MariaDb" />
<hbm2ddl console="false" export="false" update="false" drop="false" create="true" outputfilename="/schema_MariaDb.sql" format="true" haltonerror="true"/>
</hibernatetool>
</target>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
我的 persistence.xml 看起来像这样...
<persistence-unit name="randb_MariaDb" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<!-- Comment this our if you want to use properties below -->
<non-jta-data-source>java:/comp/env/jdbc/randb_MariaDb</non-jta-data-source>
<properties>
<!--
<property name="javax.persistence.jdbc.driver" value="org.mariadb.jdbc.Driver" />
<property name="javax.persistence.jdbc.url" value="jdbc:mariadb://localhost:3306/ran" />
<property name="javax.persistence.jdbc.user" value="root" />
<property name="javax.persistence.jdbc.password" value="r00tPwd" />
<property name="hibernate.connection.shutdown" value="true" />
<property name="hibernate.connection.pool_size" value="0"/>
<property name="hibernate.connection.aggressive_release" value="true"/>
-->
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" />
<property name="hibernate.show_sql" value="false" />
<property name="hibernate.format_sql" value="true"/>
<property name="hibernate.jdbc.batch_size" value="20"/>
</properties>
</persistence-unit>
我的问题是当我运行 mvn antrun:run@generate-ddl-create 时出现以下异常...
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-antrun- plugin:1.7:run (generate-ddl-create) on project WimacRanServer: An Ant BuildException has occured: org.hibernate.engine.jndi.JndiException: Error parsing JNDI name [java:/comp/env/jdbc/randb_MariaDb]
[ERROR] around Ant part ...<hibernatetool destdir=".">... @ 5:30 in /Users/dave/gitRepository/WimacRanServer/target/antrun/build-main.xml: Need to specify class name in environment or system property, or as an applet parameter, or in an application resource file: java.naming.factory.initial
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.7:run (generate-ddl-create) on project WimacRanServer: An Ant BuildException has occured: org.hibernate.engine.jndi.JndiException: Error parsing JNDI name [java:/comp/env/jdbc/randb_MariaDb]
around Ant part ...<hibernatetool destdir=".">... @ 5:30 in /Users/dave/gitRepository/WimacRanServer/target/antrun/build-main.xml
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
我猜这可能与非 jta 数据源有关，并尝试了一些方法，例如删除它并取消注释其余属性，但无济于事。如果有人遇到过类似的问题或能提供一些启发，将受到极大的欢迎。
【问题讨论】：
-
使用 hibernate 5 你根本不需要persistence.xml
-
我确实在文档中读到您不必提供 persistence.xml 但据我了解您仍然可以。上面失败的示例以前使用 mvn hibernate3:hbm2ddl 在我升级 hibernate 之前工作过，我试图回到一个可以使用类似命令的点，就像我提到的那样在 mavn 构建中生成模式。
-
我自己从来没有使用过 ANT，但我知道的是，如果指定的数据库不存在，hibernate 会在指定的数据库中生成一个表。对于 hibernate4 程序，我有一个 persistence.xml 以及一个用于 spring 的 application.xml，我在其中定义了数据库连接
-
试试这个工具：github.com/Devskiller/hbm2ddl-maven-plugin 这个插件支持 Hibernate 5.2+ 等
-
@DavidRowntree 看起来您必须实现 SchemaFilter 并通过将
hibernate.hbm2ddl.schema_filter_provider属性设置为限定类名来使用它。样品提供者在这里：gist.github.com/jkubrynski/f5b251b6bfe162afc6fafec8489dcd1a
标签： java hibernate maven jpa persistence.xml