Mybatis-Plus 的 selectPage 最多只能查询500条数据

Mybatis-Plus 的 selectPage 方法默认最多只能查询500条数据，这是因为在实际应用中，一般不会查询过多的数据，而且查询过多的数据也会对系统性能产生较大的影响。如果需要查询更多的数据，可以通过设置分页参数来实现，或者通过自定义查询方法来实现。同时，也可以通过调整 Mybatis-Plus 的配置来改变默认的查询限制。具体操作可以参考 Mybatis-Plus 的官方文档。

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mybatis-plus selectPage

MyBatis-Plus is an enhanced version of MyBatis, a popular open-source Java persistence framework. It provides additional features and utilities to simplify database operations.

To perform a pagination query using MyBatis-Plus, you can use the `selectPage` method provided by the `com.baomidou.mybatisplus.core.mapper.BaseMapper` interface.

Here's an example of how to use the `selectPage` method:

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.core.metadata.IPage;

// Assuming you have a mapper interface that extends BaseMapper
public interface YourMapper extends BaseMapper<YourEntity> {

}

// In your service or repository class
@Autowired
private YourMapper yourMapper;

public IPage<YourEntity> getEntityPage(int pageNo, int pageSize) {
    // Create a Page object with the desired page number and page size
    Page<YourEntity> page = new Page<>(pageNo, pageSize);

    // Create a QueryWrapper object for your query conditions (if any)
    QueryWrapper<YourEntity> queryWrapper = new QueryWrapper<>();

    // Perform the pagination query using selectPage
    return yourMapper.selectPage(page, queryWrapper);
}

In the above example, `YourEntity` represents your entity class, `YourMapper` is the mapper interface extending `BaseMapper`, and `yourMapper` is an instance of the mapper interface injected using the `@Autowired` annotation.

The `getEntityPage` method takes two arguments: `pageNo` for the desired page number and `pageSize` for the number of records per page. It creates a `Page` object with these parameters and a `QueryWrapper` object for any query conditions. Finally, it calls the `selectPage` method on the mapper interface to perform the pagination query and returns the resulting `IPage` object.

You can customize the `QueryWrapper` object to add various query conditions such as equals, greater than, less than, etc., depending on your requirements.

Please note that this is just a basic example, and there are many other features and options available in MyBatis-Plus for pagination and database operations. You can refer to the official documentation for more details: [MyBatis-Plus Documentation](https://mybatis.plus/)

mybatis-plus selectpage

Mybatis-Plus 的 selectPage 方法是用于分页查询数据的。它可以根据传入的参数进行分页查询，并返回查询结果和分页信息。在使用该方法时，需要先创建一个 Page 对象，然后将查询条件和分页信息设置到该对象中，最后调用 selectPage 方法进行查询。查询结果会被封装到 Page 对象中，可以通过该对象获取查询结果和分页信息。