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37 lines
2.6 KiB
37 lines
2.6 KiB
[[jdbc-packages]] |
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= Package Hierarchy |
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The Spring Framework's JDBC abstraction framework consists of four different packages: |
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* `core`: The `org.springframework.jdbc.core` package contains the `JdbcTemplate` class |
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and its various callback interfaces, plus a variety of related classes. A subpackage |
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named `org.springframework.jdbc.core.simple` contains the `SimpleJdbcInsert` and |
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`SimpleJdbcCall` classes. Another subpackage named |
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`org.springframework.jdbc.core.namedparam` contains the `NamedParameterJdbcTemplate` |
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class and the related support classes. See xref:data-access/jdbc/core.adoc[Using the JDBC Core Classes to Control Basic JDBC Processing and Error Handling], xref:data-access/jdbc/advanced.adoc[JDBC Batch Operations], and |
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xref:data-access/jdbc/simple.adoc[Simplifying JDBC Operations with the `SimpleJdbc` Classes]. |
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* `datasource`: The `org.springframework.jdbc.datasource` package contains a utility class |
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for easy `DataSource` access and various simple `DataSource` implementations that you can |
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use for testing and running unmodified JDBC code outside of a Jakarta EE container. A subpackage |
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named `org.springframework.jdbc.datasource.embedded` provides support for creating |
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embedded databases by using Java database engines, such as HSQL, H2, and Derby. See |
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xref:data-access/jdbc/connections.adoc[Controlling Database Connections] and xref:data-access/jdbc/embedded-database-support.adoc[Embedded Database Support]. |
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* `object`: The `org.springframework.jdbc.object` package contains classes that represent |
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RDBMS queries, updates, and stored procedures as thread-safe, reusable objects. See |
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xref:data-access/jdbc/object.adoc[Modeling JDBC Operations as Java Objects]. This style |
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results in a more object-oriented approach, although objects returned by queries are |
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naturally disconnected from the database. This higher-level of JDBC abstraction depends |
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on the lower-level abstraction in the `org.springframework.jdbc.core` package. |
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* `support`: The `org.springframework.jdbc.support` package provides `SQLException` |
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translation functionality and some utility classes. Exceptions thrown during JDBC processing |
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are translated to exceptions defined in the `org.springframework.dao` package. This means |
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that code using the Spring JDBC abstraction layer does not need to implement JDBC or |
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RDBMS-specific error handling. All translated exceptions are unchecked, which gives you |
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the option of catching the exceptions from which you can recover while letting other |
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exceptions be propagated to the caller. See xref:data-access/jdbc/core.adoc#jdbc-SQLExceptionTranslator[Using `SQLExceptionTranslator`]. |
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