mybatis-plus-support
时间: 2023-10-21 15:04:41 浏览: 56
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:
```xml
<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
MyBatis-Plus is a powerful and efficient library that enhances the functionalities of MyBatis, a popular Java persistence framework. MyBatis-Plus provides ready-to-use features such as automatic code generation, pagination, and dynamic SQL generation, making it easier for Java developers to work with MyBatis in their projects. Some of the key features of MyBatis-Plus include:
1. Code generation: MyBatis-Plus can generate code for entities, mappers, and services, eliminating the need for manual coding.
2. Pagination: MyBatis-Plus provides easy-to-use pagination support for queries, making it easier to handle large datasets.
3. Dynamic SQL: MyBatis-Plus can generate SQL statements dynamically based on the user's input, making it easier to build complex queries.
4. Query wrappers: MyBatis-Plus provides query wrappers that allow developers to build complex queries quickly and easily.
5. Lambda expressions: MyBatis-Plus supports lambda expressions, enabling developers to write more concise and readable code.
Overall, MyBatis-Plus is a powerful and efficient library that simplifies the development of Java applications that use MyBatis as their persistence framework.
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.