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本文档使用[hugo](http://gohugo.io/overview/introduction/)生成文档。 | ||
同时使用主题[hugo theme learn](https://github.com/matcornic/hugo-theme-learn)来作为文档风格。 |
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baseurl = "http://dangdangdotcom.github.io/sharding-jdbc/" | ||
languageCode = "en-us" | ||
title = "Sharding-JDBC" | ||
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[params] | ||
description = "A JDBC driver for shard databases and tables" | ||
author_url = "https://github.com/dangdangdotcom" | ||
project_url = "https://github.com/dangdangdotcom/sharding-jdbc" | ||
project_documentation = "http://dangdangdotcom.github.io/sharding-jdbc" | ||
github_project_name = "Sharding-JDBC" | ||
github_user_name = "dangdangdotcom" | ||
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first_color="#f8f8f8" | ||
first_border_color="#e7e7e7" | ||
first_text_color="#333" | ||
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second_color="white" | ||
second_text_color="#333" | ||
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header_color="#f8f8f8" | ||
header_text_color="rgb(51, 51, 51)" | ||
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header_link_color="#777" | ||
header_link_hover_color="rgb(51, 51, 51)" | ||
canonifyurls = true | ||
theme = "hugo-theme-learn" |
26 changes: 17 additions & 9 deletions
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sharding-jdbc-doc/content/post/faq.md → sharding-jdbc-doc/content/01-start/faq.md
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date = "2016-11-23T20:30:55+08:00" | ||
toc = true | ||
date = "2016-12-06T22:38:50+08:00" | ||
title = "FAQ" | ||
weight = 0 | ||
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weight = 2 | ||
prev = "/01-start/quick-start" | ||
next = "/01-start/features" | ||
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## 阅读源码时为什么会出现编译错误? | ||
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代码使用[Lombok](https://projectlombok.org/download.html)实现极简代码。关于更多使用和安装细节,请参考官网。 | ||
## 使用问题 | ||
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## 使用Spring命名空间时在网上相应地址找不到xsd? | ||
### 使用Spring命名空间时在网上相应地址找不到xsd? | ||
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Spring命名空间使用规范并未强制要求将xsd文件部署至公网地址,只需在jar包的`META-INF\spring.schemas`配置,并在jar包中相关位置存在即可。 | ||
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我们并未将`http://www.dangdang.com/schema/ddframe/rdb/rdb.xsd`部署至公网,但并不影响使用。相关问题请参考Spring命名空间规范。 | ||
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## 异常:Cloud not resolve placeholder ... in string value ...? | ||
### 异常:Cloud not resolve placeholder ... in string value ...? | ||
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由于inline表达式内使用Groovy语法,Groovy语法的变量占位符为`${}`,与Spring的Property占位符冲突。 | ||
故需要在Spring的配置文件中增加 | ||
`<context:property-placeholder location="classpath:conf/rdb/conf.properties" ignore-unresolvable="true"/>` | ||
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## inline表达式返回结果出现浮点数? | ||
### inline表达式返回结果出现浮点数? | ||
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Java的整数相除结果是整数,但是对于inline表达式中的Groovy语法则不同,整数相除结果是浮点数。 | ||
想获得除法整数结果需要将`A/B`改为`A.intdiv(B)` | ||
想获得除法整数结果需要将`A/B`改为`A.intdiv(B)` | ||
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## 编译源代码问题 | ||
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### 阅读源码时为什么会出现编译错误? | ||
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代码使用[Lombok](https://projectlombok.org/download.html)实现极简代码。关于更多使用和安装细节,请参考官网。 |
7 changes: 5 additions & 2 deletions
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sharding-jdbc-doc/content/post/features.md → ...ing-jdbc-doc/content/01-start/features.md
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icon = "<b>1. </b>" | ||
date = "2016-12-02T16:06:17+08:00" | ||
title = "起航" | ||
weight = 0 | ||
next = "/01-start/faq" | ||
chapter = true | ||
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# 本章导航 | ||
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- 如果想快速体验`Sharding-JDBC`的强大功能,请阅读[快速上手](/01-start/quick-start)。 | ||
- 如果在使用中遇到什么问题,请首先在[FAQ](/01-start/faq)中寻找解决问题的答案。 | ||
- 想要在自己的项目中集成`Sharding-JDBC`,您一定很关心它[能做什么](/01-start/features)和[不能做什么](/01-start/limitations)。 | ||
- 数据库中间件一般都不会支持完全的SQL语法,在这里你能了解到[支持的SQL语法](/01-start/sql-supported)。 | ||
- 最后,你会关心中间件的性能情况。这里将为你我们的[性能测试结果](/01-start/stress-test)。 | ||
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# 简介 | ||
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* `Sharding-JDBC`直接封装`JDBC API`,可以理解为增强版的`JDBC`驱动,旧代码迁移成本几乎为零 | ||
* 可适用于任何基于`java`的`ORM`框架,如:`JPA`, `Hibernate`, `Mybatis`, `Spring JDBC Template`或直接使用`JDBC`。 | ||
* 可基于任何第三方的数据库连接池,如:`DBCP`, `C3P0`, `BoneCP`, `Druid`等。 | ||
* 理论上可支持任意实现`JDBC`规范的数据库。虽然目前仅支持`MySQL`,但已有支持`Oracle`,`SQLServer`,`DB2`等数据库的计划。 | ||
* `Sharding-JDBC`功能灵活且全面 | ||
* 分片策略灵活,可支持`=`,`BETWEEN`,`IN`等多维度分片,也可支持多分片键共用。 | ||
* `SQL`解析功能完善,支持聚合,分组,排序,`Limit`,`OR`等查询,并且支持`Binding Table`以及笛卡尔积的表查询。 | ||
* 支持柔性事务(目前仅最大努力送达型)。 | ||
* 支持读写分离。 | ||
* 支持生成唯一有顺序主键 | ||
* `Sharding-JDBC`配置多样 | ||
* 可支持YAML和Spring命名空间配置 | ||
* 灵活多样的`inline`方式 | ||
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# 整体架构图 | ||
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![整体架构图1](/img/architecture.png) |
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...ding-jdbc-doc/content/post/limitations.md → ...-jdbc-doc/content/01-start/limitations.md
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8 changes: 6 additions & 2 deletions
8
sharding-jdbc-doc/content/post/concepts.md → ...ing-jdbc-doc/content/02-guide/concepts.md
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