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MIT

mybatis-subtable

MyBatis分表插件,对MyBatis代码无侵入,不改变对MyBatis的使用习惯。

使用示例

1、mybatis-config.xml配置文件添加插件

<plugins>
	<plugin interceptor="org.jwxa.mybatis.subtable.plugin.SubTablePlugin" />
</plugins>

2、需要分表的Mapper/Dao类添加@SubTable注解,使用strategyClass指定分表策略类

// LongStrategy:自定义分表策略类
@SubTable(strategyClass=LongStrategy.class)

3、不需要分表的方法添加@SubTableIgnore注解

@SubTableIgnore
List<User> getList();

分表策略

  • 自定义分表策略需要实现org.jwxa.mybatis.subtable.strategy.Strategy接口,实现getFinalTable获取最终表名方法。
  • StrategyUtil工具类提供常用分表策略方法。

**使用示例:**使用Long类型id分表,10张分表

// 10张表,用id进行分表
public class LongStrategy implements Strategy {
	@Override
	public String getFinalTable(String baseTableName, Object params) {
		Long flag = -1l;
		if(params instanceof User) {
			flag = ((User)params).getId();
		}else if(params instanceof Long) {
			flag = (Long) params;
		}
		return StrategyUtil.getHashTable(baseTableName, "_", flag, 10);
	}
}

测试示例说明

  1. 执行src/test/resources/initsql.sql初始化数据库
  2. 运行MyBatis测试修改mybatis-config.xml数据库配置信息,测试类:org.jwxa.mybatis.subtable.test.DeviceDaoTest
  3. 运行Spring-MyBatis测试修改jdbc.properties数据库配置信息,测试类:org.jwxa.mybatis.subtable.test.spring.UserDaoTest
The MIT License (MIT) Copyright (c) 2017 许剑锋 Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

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MyBatis分表插件 展开 收起
Java
MIT
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