mybatis-plus selectOne
时间: 2023-08-16 18:13:06 浏览: 124
MyBatis-Plus is a popular Java persistence framework that extends the functionality of MyBatis. It provides additional features and simplifies the development of MyBatis-based applications.
In MyBatis-Plus, the `selectOne` method is used to query a single record from the database based on the specified conditions. It returns a single entity object that matches the query criteria.
Here is an example of using `selectOne` in MyBatis-Plus:
```java
User user = new User();
user.setId(1);
User result = userMapper.selectOne(new QueryWrapper<>(user));
```
In this example, we create a `User` object and set the `id` property to 1. We then use `selectOne` method of the `userMapper` to query a single record from the database based on the `id` match.
Please note that `userMapper` is an instance of the MyBatis mapper interface, which is automatically generated by MyBatis-Plus based on your entity class. The `QueryWrapper` is used to specify the query conditions.
Hope this helps! Let me know if you have any more questions.
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