在MyBatisPlus中添加分页插件

开发过程中，数据量大的时候，查询效率会有所下降，这时，我们往往会使用分页。

具体操作入下：

1、添加分页插件：

package com.zhang.config;


import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.transaction.annotation.EnableTransactionManagement;


@EnableTransactionManagement
@Configuration
@MapperScan("com.zhang.mapper")
public class MybatisPlusConfig {

    @Bean
    public PaginationInterceptor paginationInterceptor() {
        // 1、创建分页插件
        PaginationInterceptor paginationInterceptor = new PaginationInterceptor();
        //   2、添加分页插件
        paginationInterceptor.setLimit(500);
        return paginationInterceptor;
    }
}

2、编写接口：

    @GetMapping(value = "/testPages")
    public R test(@RequestParam("pageNo") Integer pageNo
            , @RequestParam("pageSize") Integer pageSize) {
//        1、分页条件
        Page page = new Page<>(pageNo, pageSize);
//        2、分页排序
        page.addOrder(OrderItem.asc("age"));

        IPage pages = animalService.page(page);
        return R.ok(pages);
    }

3、测试分页效果：

如：

{
	"code": 0,
	"data": {
		"records": [
			{
				"id": "1775e2db7fb5e0d9b8e98d4137f58b91",
				"name": "狗毛",
				"age": 2,
				"delFlag": "正常",
				"hobby": "骨",
				"createTime": "2023-09-30T04:10:22.000+00:00",
				"updateTime": "2022-01-30T08:55:56.000+00:00",
				"relation": null
			},
			{
				"id": "320f4e82f56d66cb8d8ab2c991f9526c",
				"name": "狗哥",
				"age": 2,
				"delFlag": "正常",
				"hobby": "骨头",
				"createTime": "2022-02-23T06:24:22.000+00:00",
				"updateTime": null,
				"relation": null
			}
		],
		"total": 9,
		"size": 2,
		"current": 1,
		"orders": [
			{
				"column": "age",
				"asc": true
			}
		],
		"searchCount": true,
		"pages": 5
	},
	"msg": "执行成功"
}