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27 lines
1.7 KiB
27 lines
1.7 KiB
[[jdbc-choose-style]] |
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= Choosing an Approach for JDBC Database Access |
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You can choose among several approaches to form the basis for your JDBC database access. |
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In addition to three flavors of `JdbcTemplate`, a `SimpleJdbcInsert` and `SimpleJdbcCall` |
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approach optimizes database metadata, and the RDBMS Object style results in a more |
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object-oriented approach. Once you start using one of these approaches, you can still mix |
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and match to include a feature from a different approach. |
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* `JdbcTemplate` is the classic and most popular Spring JDBC approach. This |
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"`lowest-level`" approach and all others use a `JdbcTemplate` under the covers. |
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* `NamedParameterJdbcTemplate` wraps a `JdbcTemplate` to provide named parameters |
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instead of the traditional JDBC `?` placeholders. This approach provides better |
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documentation and ease of use when you have multiple parameters for an SQL statement. |
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* `SimpleJdbcInsert` and `SimpleJdbcCall` optimize database metadata to limit the amount |
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of necessary configuration. This approach simplifies coding so that you only need to |
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provide the name of the table or procedure and a map of parameters matching the column |
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names. This works only if the database provides adequate metadata. If the database does |
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not provide this metadata, you have to provide explicit configuration of the parameters. |
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* RDBMS objects — including `MappingSqlQuery`, `SqlUpdate`, and `StoredProcedure` — |
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require you to create reusable and thread-safe objects during initialization of your |
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data-access layer. This approach allows you to define your query string, declare |
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parameters, and compile the query. Once you do that, `execute(...)`, `update(...)`, and |
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`findObject(...)` methods can be called multiple times with various parameter values. |
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