mybatis-plus 实现分页查询的示例代码

<!-- MyBatis-Plus 分页插件 -->
<dependency>
    <groupId>com.baomidou</groupId>
    <artifactId>mybatis-plus-boot-starter</artifactId>
    <version>你的MyBatis-Plus版本</version>
</dependency>

import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class MybatisPlusConfig {

    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor());
        return interceptor;
    }
}

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import org.apache.ibatis.annotations.Mapper;
import your.package.name.entity.YourEntity;

@Mapper
public interface YourEntityMapper extends BaseMapper<YourEntity> {
    // 这里定义你的 CRUD 操作
}

import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import your.package.name.mapper.YourEntityMapper;
import your.package.name.entity.YourEntity;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class YourEntityService {

    @Autowired
    private YourEntityMapper yourEntityMapper;

    public Page<YourEntity> selectPage(int current, int size) {
        Page<YourEntity> page = new Page<>(current, size);
        return yourEntityMapper.selectPage(page, null); // 第二个参数可以是查询条件，这里为 null 表示查询所有
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import your.package.name.entity.YourEntity;
import your.package.name.service.YourEntityService;

import java.util.List;

@RestController
public class YourEntityController {

    @Autowired
    private YourEntityService yourEntityService;

    @GetMapping("your-entity/list")
    public Page<YourEntity> list(@RequestParam(defaultValue = "1") int current,
                                 @RequestParam(defaultValue = "10") int size) {
        return yourEntityService.selectPage(current, size);
    }
}