c5a4068e84
* add state and callback pattern * add command and template-method pattern * add iterator pattern * add bridege and DI pattern * fix issue #1600 * add converter,proxy,visitor pattern * add caching,composite,delegation,dirty-flag,interpreter patterns * add dao and producer-consumer * add dto and provate class data pattern * fix #1646 png path problems * fix #1646 composite png path case problem * add abstract document pattern and version-number pattern * add ambassador pattern * add acyclic-visitor and api-gateway pattern * add abstract-factory pattern * add active-object pattern * add aggregator-microservices and arrange-act-assert pattern * update async-method-invocation pattern * add balking and business-delegate pattern * add bytecode and circuit-break pattern * update arrange/act/assert pattern problems * add csch pattern * add language code, correct pic path * #1805 update permalink Co-authored-by: Subhrodip Mohanta <subhrodipmohanta@gmail.com> Co-authored-by: Mike <admin@xiaod.info> Co-authored-by: Ilkka Seppälä <iluwatar@users.noreply.github.com>
26 lines
667 B
Markdown
26 lines
667 B
Markdown
---
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layout: pattern
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title: Data Mapper
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folder: data-mapper
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permalink: /patterns/data-mapper/
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categories: Architectural
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language: zh
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tags:
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- Decoupling
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---
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## 含义
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一个用于在持久化对象和数据库之间传输数据的映射器，同时保持它们之间和映射器本身的独立性。
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## 类图
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## 适用场景
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数据映射器适用于以下场景：
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* 当你想把数据对象从数据库访问层解耦时时
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* 当你想编写多个数据查询/持久化实现时
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## 引用
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* [Data Mapper](http://richard.jp.leguen.ca/tutoring/soen343-f2010/tutorials/implementing-data-mapper/) |