mybatis-plus-support

Mybatis-plus-support是Mybatis Plus的一个附加模块，它为Mybatis Plus提供了额外的支持和功能。在您提供的引用中，您可以看到在Maven的依赖中，将其引入到项目中：

<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-support</artifactId>
    <version>2.1.9</version>
    <scope>compile</scope>
</dependency>

通过引入mybatis-plus-support模块，您可以获得一些额外的功能，例如自定义Sql注入器（ISqlInjector）和乐观锁拦截器（OptimisticLockerInterceptor）。这些功能可以通过自定义的配置类（CommonMybatisPlusConfig）进行注入和配置。

请注意，在您提供的引用中，您还可以看到在业务层的继承关系中，使用了mybatis-plus的业务接口（ServiceImpl）来实现对数据库的操作。

综上所述，mybatis-plus-support是Mybatis Plus的一个附加模块，它为Mybatis Plus提供了额外的支持和功能，例如自定义Sql注入器和乐观锁拦截器。

相关问题

mybatis-plus-join

MyBatis-Plus is an enhanced version of MyBatis, a popular Java-based persistence framework. MyBatis-Plus provides additional features and functionalities, including support for join queries.

To perform join queries using MyBatis-Plus, you can use the `join` method provided by the `QueryWrapper` class. This method allows you to specify the join type, table name, and join condition.

Here's an example of how to perform an inner join using MyBatis-Plus:

QueryWrapper<User> queryWrapper = new QueryWrapper<>();
queryWrapper.eq("user_id", 1)
    .join("order", "user.user_id = order.user_id")
    .select("user.*", "order.order_no");

List<User> userList = userMapper.selectList(queryWrapper);

In this example, we are querying for a user with `user_id` equal to 1 and joining the `order` table using the `user_id` column as the join condition. We are also selecting all columns from the `user` table and the `order_no` column from the `order` table.

MyBatis-Plus supports other types of joins, including left join, right join, and full outer join. You can specify the join type using the `JoinType` enumeration provided by MyBatis-Plus.

Overall, MyBatis-Plus makes it easy to perform join queries in Java applications using the MyBatis framework.

MyBatis-Plus

MyBatis-Plus is an open-source, lightweight, and feature-rich extension library for the MyBatis Java persistence framework. It provides a set of convenient and powerful APIs and features that simplify the development of MyBatis-based applications, including:

1. Code generation: MyBatis-Plus can automatically generate CRUD (Create, Read, Update, Delete) operations for your database tables, saving you time and effort.

2. Wrapper: It provides a QueryWrapper and UpdateWrapper to help you easily construct complex SQL queries.

3. Pagination: It offers a built-in pagination feature that allows you to easily paginate your query results.

4. SQL injection prevention: MyBatis-Plus provides various mechanisms to prevent SQL injection attacks, such as parameterized queries and statement caching.

5. Batch operations: MyBatis-Plus allows you to perform batch operations on your database, such as inserting multiple records at once.

6. Annotation support: MyBatis-Plus supports annotations for mapping database tables and columns to Java objects, making it easy to work with both MyBatis and Java.

Overall, MyBatis-Plus is a powerful and useful addition to the MyBatis framework that can greatly simplify and streamline your database operations.