将 Hibernate 升级到 5.4.1 后如何导出架构？答案

【问题标题】：How do I export schema after upgrading Hibernate to 5.4.1?将 Hibernate 升级到 5.4.1 后如何导出架构？
【发布时间】：2019-02-21 14:57:24
【问题描述】：

我最近将 Hibernate 从 4.3.7 更新到 5.4.1，SchemaExport API 从 5.1 开始发生了变化。此代码现在显示编译问题（在SchemaExport 构造函数和execute 方法上）。

/**
 * Method to generate a SQL script which aim is to create SQL tables for the
 * entities indicated as parameters.
 */
private void generateScript(Class<?>... classes) {
    Configuration configuration = new Configuration();
    configuration.setProperty(Environment.DIALECT, entityManagerFactory.getProperties().get(DIALECT_PROPERTY).toString());
    for (Class<?> entityClass : classes) {
        configuration.addAnnotatedClass(entityClass);
    }
    SchemaExport schemaExport = new SchemaExport(configuration);
    schemaExport.setDelimiter(SCRIPT_DELIMITER);
    schemaExport.setOutputFile(getScriptPath());
    schemaExport.setFormat(true);
    boolean consolePrint = false;
    boolean exportInDatabase = false;
    schemaExport.execute(consolePrint, exportInDatabase, false, true);
}

我已经看到与此问题相关的其他问题，但没有足够具体的内容来帮助我重写此函数。

【问题讨论】：

标签： java hibernate schemaexport

【解决方案1】：

这是我所做的并且它有效：

private void genererScript(Class<?>... classes) {

    StandardServiceRegistry standardRegistry = new StandardServiceRegistryBuilder()
            .applySetting(Environment.DIALECT, entityManagerFactory.getProperties().get(DIALECT_PROPERTY).toString())
            .build();

    MetadataSources sources = new MetadataSources( standardRegistry );
    for (Class<?> entityClass : classes) {
        sources.addAnnotatedClass(entityClass);
    }

    MetadataImplementor metadata = (MetadataImplementor) sources
            .getMetadataBuilder()
            .build();

    EnumSet<TargetType> targetTypes = EnumSet.of(TargetType.SCRIPT);

    try {
        Files.delete(Paths.get(getScriptPath()));
    } catch (IOException e) {
        /*
         * The file did not exist...
         * we do nothing.
         */
    }

    SchemaExport schemaExport = new SchemaExport();
    schemaExport.setDelimiter(SCRIPT_DELIMITER);
    schemaExport.setOutputFile(getScriptPath());
    schemaExport.setFormat(true);
    schemaExport.createOnly(targetTypes, metadata);
}

【讨论】：