java-design-patterns/localization/zh/data-mapper/README.md

---
title: Data Mapper
category: Architectural
language: zh
tags:
 - Decoupling
---

## 含义
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。

## 类图
![alt text](etc/data-mapper.png "Data Mapper")

## 适用场景
数据映射器适用于以下场景：

* 当你想把数据对象从数据库访问层解耦时时
* 当你想编写多个数据查询/持久化实现时

## 引用

* [Data Mapper](http://richard.jp.leguen.ca/tutoring/soen343-f2010/tutorials/implementing-data-mapper/)
docs: Translate some of the README docs into Chinese (#1744) * docs: translated docs to zh * docs: translated doc of sharding pattern to Chinese * docs: translated doc of factory pattern to Chinese * docs: translated doc of factory-kit pattern to Chinese Co-authored-by: Subhrodip Mohanta <hello@subho.xyz> 2021-05-07 01:57:16 +08:00			`---`
			`title: Data Mapper`
Update frontmatters 2021-09-12 13:27:23 +03:00			`category: Architectural`
docs: Translation for zh (#1805) * 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> 2021-08-01 22:55:54 +08:00			`language: zh`
docs: Translate some of the README docs into Chinese (#1744) * docs: translated docs to zh * docs: translated doc of sharding pattern to Chinese * docs: translated doc of factory pattern to Chinese * docs: translated doc of factory-kit pattern to Chinese Co-authored-by: Subhrodip Mohanta <hello@subho.xyz> 2021-05-07 01:57:16 +08:00			`tags:`
			`- Decoupling`
			`---`

			`## 含义`
			`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。`

			`## 类图`
update image paths 2021-10-31 20:00:22 +02:00			`![alt text](etc/data-mapper.png "Data Mapper")`
docs: Translate some of the README docs into Chinese (#1744) * docs: translated docs to zh * docs: translated doc of sharding pattern to Chinese * docs: translated doc of factory pattern to Chinese * docs: translated doc of factory-kit pattern to Chinese Co-authored-by: Subhrodip Mohanta <hello@subho.xyz> 2021-05-07 01:57:16 +08:00
			`## 适用场景`
			`数据映射器适用于以下场景：`

			`* 当你想把数据对象从数据库访问层解耦时时`
			`* 当你想编写多个数据查询/持久化实现时`

			`## 引用`

			`* [Data Mapper](http://richard.jp.leguen.ca/tutoring/soen343-f2010/tutorials/implementing-data-mapper/)`