SpringBoot+Mybatis-Plus兩種分頁方法

用到的依賴：

<dependency>
   <groupId>com.baomidou</groupId>
   <artifactId>mybatis-plus-boot-starter</artifactId>
   <version>${mybatisplus.version}</version>
   <exclusions>
      <exclusion>
         <groupId>com.baomidou</groupId>
         <artifactId>mybatis-plus-generator</artifactId>
      </exclusion>
   </exclusions>
</dependency>

 

首先配置mybatis-plus配置

package com.qfclo.login.config; import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor; import com.baomidou.mybatisplus.extension.plugins.PerformanceInterceptor; import org.mybatis.spring.annotation.MapperScan; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import java.util.Properties; @Configuration @MapperScan("com.qfclo.login.mapper") public class MybatisPlusConfig { /** * 分頁插件 */ @Bean public PaginationInterceptorpaginationInterceptor() { return new PaginationInterceptor(); } /** * 打印 sql */ @Bean public PerformanceInterceptorperformanceInterceptor() { PerformanceInterceptor performanceInterceptor =new PerformanceInterceptor(); //格式化sql語句 Properties properties =new Properties(); properties.setProperty("format", "faalse"); performanceInterceptor.setProperties(properties); return performanceInterceptor; } } 

第一種方式，mybatis-plus原生QueryWrapper方式分頁，這種方式比較簡單，可以不用修改Mapper，適合簡單的增刪改查。

    @RequestMapping(value = "/orgist1")//,method = RequestMethod.POST) public Map<String,Object> orglist1() { Map<String,Object> map = new HashMap<>(); QueryWrapper<OauthOrganization> queryWrapper = new QueryWrapper<>(); queryWrapper.orderByDesc("id"); Page<OauthOrganization> page = new Page<>(1,5); // 查詢第1頁，每頁返回5條 IPage<OauthOrganization> iPage = oauthOrganizationMapper.selectPage(page,queryWrapper); System.out.println(iPage.getRecords().size()); System.out.println(JSON.toJSONString(iPage)); return map; } 

第二種方式，使用mapper文件的select注解，優點是可以方便的建立查詢語句，可以聯合多表查詢。
Mapper文件

    @Select("SELECT * FROM oauth_organization WHERE id < #{m.id} ORDER BY `id` DESC") List<OauthOrganization> selectpage(Map<String,Object> m, Page<OauthOrganization> page); 

Controller文件

    @RequestMapping(value = "/orgist4")//,method = RequestMethod.POST) public Map<String,Object> orglist4() { Map<String,Object> map = new HashMap<>(); Map<String,Object> m = new HashMap<>(); m.put("id",5); Page<OauthOrganization> page = new Page<>(1,5); page.setRecords(oauthOrganizationMapper.selectpage(m,page)); System.out.println(page.getRecords().size()); System.out.println(JSON.toJSONString(page)); return map; }

作者：小魚兒2020
鏈接：https://www.jianshu.com/p/0a21569f1e06
來源：簡書