我能够将您的Hibernate解决方案与JPA2.1混合使用：
现在，我可以从persistence.xml添加实体类
这样，我可以在实体所在的jar外部生成SQl文件。
这是一个临时解决方案，直到休眠修复此错误为止
谢谢你的帮助。
package com.stackoverflow.common.util.schema;import java.io.IOException;import java.util.Properties;import javax.persistence.EntityManagerFactory;import javax.persistence.Persistence;import javax.persistence.metamodel.ManagedType;import javax.persistence.metamodel.metamodel;import org.hibernate.boot.metadataBuilder;import org.hibernate.boot.metadataSources;import org.hibernate.boot.registry.BootstrapServiceRegistry;import org.hibernate.boot.registry.BootstrapServiceRegistryBuilder;import org.hibernate.boot.registry.StandardServiceRegistry;import org.hibernate.boot.registry.StandardServiceRegistryBuilder;import org.hibernate.boot.spi.metadataImplementor;import org.hibernate.cfg.Environment;import org.hibernate.engine.jdbc.connections.internal.DriverManagerConnectionProviderImpl;import org.hibernate.jpa.AvailableSettings;import org.hibernate.tool.hbm2ddl.SchemaExport;import org.hibernate.dialect.MySQL5InnoDBDialect;public class JPA21Hibernate5ExportSchema { private static final String JDBC_DRIVER = "org.h2.Driver"; private static final String JDBC_URL = "jdbc:h2:mem:export;DB_CLOSE_DELAY=-1"; private static final String JDBC_USERNAME = "sa"; private static final String JDBC_PASSWORD = ""; public JPA21Hibernate5ExportSchema() { } public static void main(String[] args) { try { JPA21Hibernate5ExportSchema hes = new JPA21Hibernate5ExportSchema(); hes.export(args[0], args[1]); System.exit(0); } catch (Exception e) { e.printStackTrace(); System.exit(1); } } public void export(String persistenceUnitName, String sqlFile) throws IOException, ClassNotFoundException { final BootstrapServiceRegistry bsr = new BootstrapServiceRegistryBuilder().build(); final metadataSources metadataSources = new metadataSources(bsr); final StandardServiceRegistryBuilder srrBuilder = new StandardServiceRegistryBuilder(bsr) .applySetting(Environment.CONNECTION_PROVIDER, DriverManagerConnectionProviderImpl.class.getName()) .applySetting(Environment.DIALECT, MySQL5InnoDBDialect.class.getName()) .applySetting(Environment.URL, JDBC_URL).applySetting(Environment.USER, JDBC_USERNAME) .applySetting(Environment.PASS, JDBC_PASSWORD); // Use the persistence metamodel to retrieve the Entities classes metamodel metamodel = this.getmetamodel(persistenceUnitName); for (final ManagedType<?> managedType : metamodel.getManagedTypes()) { metadataSources.addAnnotatedClass(managedType.getJavaType()); } final StandardServiceRegistry ssr = (StandardServiceRegistry) srrBuilder.build(); final metadataBuilder metadataBuilder = metadataSources.getmetadataBuilder(ssr); final SchemaExport exporter = new SchemaExport((metadataImplementor) metadataBuilder.build()); exporter.setOutputFile(sqlFile); exporter.setDelimiter(";"); exporter.setFormat(true); exporter.create(false, true); } private metamodel getmetamodel(String persistenceUnitName) { final Properties persistenceProperties = new Properties(); persistenceProperties.setProperty(AvailableSettings.JDBC_DRIVER, JDBC_DRIVER); persistenceProperties.setProperty(AvailableSettings.JDBC_URL, JDBC_URL); persistenceProperties.setProperty(AvailableSettings.JDBC_USER, "sa"); persistenceProperties.setProperty(AvailableSettings.JDBC_PASSWORD, ""); persistenceProperties.setProperty(org.hibernate.cfg.AvailableSettings.DIALECT, MySQL5InnoDBDialect.class.getName()); final EntityManagerFactory emf = Persistence.createEntityManagerFactory(persistenceUnitName, persistenceProperties); return emf.getmetamodel(); }}
