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JPA(Hibernate)和自定义表前缀

jpa hibernate java

Mike Minicki · 技术社区 · 14 年前

是否可以覆盖jpa/hibernate中的表名,以便为所有项目实体添加一个通用前缀?例如,能够用“jbpm5_uu”前缀给所有jbpm 5表加前缀。

接受答案示例:

public class JBPM5NamingStrategy extends ImprovedNamingStrategy {
   public String classToTableName(String className) {
      return StringHelper.unqualify(className);
   }
   public String propertyToColumnName(String propertyName) {
      return propertyName;
   }
   public String tableName(String tableName) {
      return "JBPM5_" + tableName;
   }
   public String columnName(String columnName) {
      return columnName;
   }
   public String propertyToTableName(String className, String propertyName) {
      return "JBPM5_" + classToTableName(className) + '_'
         + propertyToColumnName(propertyName);
   }
}

3 回复 | 直到 6 年前

Sean Patrick Floyd 14 年前

一种同时重命名所有表的方法是实现自己的NamingStrategy(实现 org.hibernate.cfg.NamingStrategy )。

所使用的NamingStrategy在persistence.xml中由

<property name="hibernate.ejb.naming_strategy"
          value="com.example.MyNamingStrategy" />

Community Neeleshkumar S 7 年前

使用A NamingStrategy . 这个 previous answer of mine 应该提供你所需要的。

从上一个答案复制:

这是一个例子生成窗体的表名 type1_type2用于联接表并添加所有表的通用前缀:

public class CustomNamingStrategy extends ImprovedNamingStrategy {

    private static final long serialVersionUID = 1L;
    private static final String PREFIX = "PFX_";

    @Override
    public String classToTableName(final String className) {
        return this.addPrefix(super.classToTableName(className));
    }

    @Override
    public String collectionTableName(final String ownerEntity,
            final String ownerEntityTable, final String associatedEntity,
            final String associatedEntityTable, final String propertyName) {
        return this.addPrefix(super.collectionTableName(ownerEntity,
                ownerEntityTable, associatedEntity, associatedEntityTable,
                propertyName));
    }

    @Override
    public String logicalCollectionTableName(final String tableName,
            final String ownerEntityTable, final String associatedEntityTable,
            final String propertyName) {
        return this.addPrefix(super.logicalCollectionTableName(tableName,
                ownerEntityTable, associatedEntityTable, propertyName));
    }

    private String addPrefix(final String composedTableName) {

        return PREFIX
                + composedTableName.toUpperCase().replace("_", "");

    }

}

Peter Wippermann 6 年前

在Hibernate5中,您仍然需要自己实现这个行为。然而,现在有了隐式和物理命名策略。

这是一个用Hibernate 5作为表名前缀的示例性实现:

package my.app;

import org.hibernate.boot.model.naming.Identifier;
import org.hibernate.boot.model.naming.PhysicalNamingStrategyStandardImpl;
import org.hibernate.engine.jdbc.env.spi.JdbcEnvironment;

public class PrefixPhysicalNamingStrategy extends PhysicalNamingStrategyStandardImpl {

    /**
     * TODO Make this an injectable application property
     */
    public static final String TABLE_NAME_PREFIX = "MY_PREFIX_";

    @Override
    public Identifier toPhysicalTableName(Identifier name, JdbcEnvironment context) {
        Identifier newIdentifier = new Identifier(TABLE_NAME_PREFIX + name.getText(), name.isQuoted());
        return super.toPhysicalTableName(newIdentifier, context);
    }
}

使用SpringBoot2的这个配置属性来激活物理命名策略:

spring.jpa.hibernate.naming.physical-strategy: my.app.PrefixPhysicalNamingStrategy