Give me an example of Mybatis plus queryupdate wrapper

Sure, here is an example of Mybatis plus query update wrapper: ``` UpdateWrapper<User> updateWrapper = new UpdateWrapper<>(); updateWrapper.eq("name", "John") .set("age", 30) .set("email", "[email protected]"); userMapper.update(null, updateWrapper); ``` In this example, we create an instance of `UpdateWrapper` for the `User` entity. We then call the `eq()` method to set a condition that the user's name must be "John". We then call the `set()` method to update the user's age to 30 and email to "[email protected]". Finally, we call the `update()` method to execute the update operation.

给一个例子: Mybatis plus queryupdate wrapper

Sure, here is an example of MyBatis-Plus QueryWrapper for updating records: ``` UpdateWrapper<User> updateWrapper = new UpdateWrapper<>(); updateWrapper.lambda() .set(User::getName, "John") .set(User::getAge, 30) .eq(User::getId, 1); int updatedRows = userMapper.update(null, updateWrapper); ``` In this example, we create an UpdateWrapper object for the User entity, set the new values for the name and age fields, and specify that we want to update the record with id=1. Finally, we call the update method on the userMapper object passing the updateWrapper as a parameter. The method returns the number of updated rows.

mybatis plus querywrapper

MyBatis Plus QueryWrapper is a utility class provided by the MyBatis Plus framework to help in building complex database queries. It is used in conjunction with the MyBatis Plus Query API to construct criteria for selecting, updating, or deleting records from a database table. QueryWrapper provides a fluent and intuitive API for constructing queries with various conditions such as equal, not equal, greater than, less than, between, like, and more. It also supports nested conditions and chaining multiple conditions together. Here's an example of how to use QueryWrapper: ```java // Import the necessary classes import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper; import com.baomidou.mybatisplus.core.conditions.Wrapper; // Create a QueryWrapper instance QueryWrapper<User> queryWrapper = new QueryWrapper<>(); // Add conditions to the query queryWrapper .eq("age", 25) .like("name", "John") .between("salary", 2000, 5000) .orderByAsc("age"); // Use the query wrapper in your MyBatis Plus query List<User> userList = userMapper.selectList(queryWrapper); ``` In this example, we create a QueryWrapper instance and chain different conditions like `eq`, `like`, and `between` to construct the desired query. Finally, we pass the query wrapper to the `selectList` method of the MyBatis Plus mapper interface to execute the query. You can find more information about QueryWrapper and other features of MyBatis Plus in their official documentation.

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Give me an example of Mybatis plus queryupdate wrapper

给一个例子: Mybatis plus queryupdate wrapper

mybatis plus querywrapper

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