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README.md
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README.md
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# mybatis-plus-join
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<p align="center">
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<a href="https://github.com/yulichang/mybatis-plus-join" target="_blank">
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<img alt="Mybatis-Plus-Join-Logo" src="https://mybatisplusjoin.com/lg.png">
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</a>
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</p>
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<p align="center">
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为简化开发工作、提高生产率而生
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</p>
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* 对 <a href="https://gitee.com/baomidou/mybatis-plus" target="_blank">mybatis-plus</a> 多表查询的扩展
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* <a href="https://gitee.com/best_handsome/mybatis-plus-join-demo" target="_blank">演示工程</a>
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* <a href="https://www.baidu.com/link?url=cknmzNRg3E2p9d0BbUuQ2MBYCSSs6u1LCtNm5RzIzui&wd=&eqid=a5bbe908000085540000000563f830c5" target="_blank">插件文档 https://ylctmh.com</a>
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* 点个Star支持一下吧 :)
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<p align="center">
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<a>
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<img src="https://img.shields.io/github/stars/yulichang/mybatis-plus-join.svg?style=social&label=Stars" />
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</a>
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<img src="https://gitee.com/best_handsome/mybatis-plus-join/badge/star.svg?theme=dark" alt=""/>
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<br/>
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<a href="https://central.sonatype.com/artifact/com.github.yulichang/mybatis-plus-join-boot-starter">
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<img alt="maven" src="https://img.shields.io/maven-central/v/com.github.yulichang/mybatis-plus-join-boot-starter.svg?style=flat-square">
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</a>
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QQ群:1022221898
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<a href="https://www.apache.org/licenses/LICENSE-2.0">
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<img alt="code style" src="https://img.shields.io/badge/license-Apache%202-4EB1BA.svg?style=flat-square">
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</a>
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</p>
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<h1 align="center">mybatis-plus-join</h1>
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<p align="center">
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对 <a href="https://gitee.com/baomidou/mybatis-plus" target="_blank">mybatis-plus</a> 多表查询的扩展 |
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<a href="https://gitee.com/best_handsome/mybatis-plus-join-demo" target="_blank">演示工程</a> |
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<a href="https://www.baidu.com/link?url=cknmzNRg3E2p9d0BbUuQ2MBYCSSs6u1LCtNm5RzIzui&wd=&eqid=a5bbe908000085540000000563f830c5" target="_blank">使用文档</a> |
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点个Star支持一下吧 (☆▽☆)
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</p>
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<p align="center">
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QQ群:1022221898 或者
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<a href="https://gitee.com/best_handsome/mybatis-plus-join/issues/I65N2M" target="_blank">添加作者微信，备注MPJ，加入微信群</a>
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<img width="200px" src="https://ylctmh.com/qr.png" alt="添加作者微信，备注MPJ，加入微信群"/>
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<br/>
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<img width="200px" src="https://mybatisplusjoin.com/qr.png" alt="添加作者微信，备注MPJ，加入微信群"/>
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</p>
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### <a href="https://www.baidu.com/link?url=cknmzNRg3E2p9d0BbUuQ2MBYCSSs6u1LCtNm5RzIzui&wd=&eqid=a5bbe908000085540000000563f830c5" target="_blank">插件文档 https://ylctmh.com</a>
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### <a href="https://www.baidu.com/link?url=6NtKqbGKUIIdwoBUaqNkQnLiG3d5y03L6Pfg6ODId0VKfPifpB1xqdQzsBprm-0h&wd=&eqid=d26e7f1600004777000000056440ade6" target="_blank">使用文档WIKI</a>
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## 使用方法
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@Test
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void testResultMap() {
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MPJLambdaWrapper<UserDO> wrapper = new MPJLambdaWrapper<UserDO>()
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MPJLambdaWrapper<UserDO> wrapper = new MPJLambdaWrapper<>(User.class)
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.selectAll(UserDO.class)
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//对多查询
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.selectCollection(AddressDO.class, UesrDTO::getAddressList)
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}
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```
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等效于ResultMap
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```xml
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<resultMap id="xxxxxxxx" type="com.github.yulichang.join.dto.UserDTO">
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<result property="id" column="id"/>
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<result property="name" column="name"/>
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<!--其他属性省略-->
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<collection property="addressList" javaType="java.util.List"
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ofType="com.github.yulichang.join.entity.UserAddressDO">
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<id property="id" column="mpj_id"/>
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<result property="address" column="address"/>
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<result property="userId" column="user_id"/>
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<!--其他属性省略-->
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</collection>
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</resultMap>
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```
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MPJLambdaWrapper其他功能
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* <a href="https://ylctmh.com/pages/core/lambda/select/selectCollection.html" target="_blank">一对一，一对多使用</a>
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* <a href="https://ylctmh.com/pages/core/lambda/select/selectFunc.html" target="_blank">简单的SQL函数使用</a>
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* <a href="https://ylctmh.com/pages/core/lambda/join/leftJoin.html" target="_blank">ON语句多条件支持</a>
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* <a href="https://mybatisplusjoin.com/pages/core/lambda/select/selectCollection.html" target="_blank">
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一对一，一对多使用</a>
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* <a href="https://mybatisplusjoin.com/pages/core/lambda/select/selectFunc.html" target="_blank">简单的SQL函数使用</a>
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* <a href="https://mybatisplusjoin.com/pages/core/lambda/join/leftJoin.html" target="_blank">ON语句多条件支持</a>
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* <a href="https://www.baidu.com/link?url=cknmzNRg3E2p9d0BbUuQ2MBYCSSs6u1LCtNm5RzIzui&wd=&eqid=a5bbe908000085540000000563f830c5" target="_blank">其他全部功能请参考使用文档</a>
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# <a href="https://www.baidu.com/link?url=cknmzNRg3E2p9d0BbUuQ2MBYCSSs6u1LCtNm5RzIzui&wd=&eqid=a5bbe908000085540000000563f830c5" target="_blank">插件文档 wiki https://ylctmh.com</a>
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# <a href="https://www.baidu.com/link?url=cknmzNRg3E2p9d0BbUuQ2MBYCSSs6u1LCtNm5RzIzui&wd=&eqid=a5bbe908000085540000000563f830c5" target="_blank">使用文档 wiki https://mybatisplusjoin.com</a>
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@ -8,6 +8,9 @@ import java.util.List;
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import java.util.Objects;
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import java.util.stream.Collectors;
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/**
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* @author yulichang
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*/
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@Data
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public class TableList {
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