MybatisPlus分页查询插件

公共配置类

@Configuration
public class MybatisPlusPageConfig {

    /*	旧版本配置
	@Bean
	public PaginationInterceptor paginationInterceptor(){
		return new PaginationInterceptor();
	}*/

    /**
     * 新的分页插件,一缓和二缓遵循mybatis的规则,
     * 需要设置 MybatisConfiguration#useDeprecatedExecutor = false 避免缓存出现问题
     */
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor() {
        MybatisPlusInterceptor interceptor = new MybatisPlusInterceptor();
        interceptor.addInnerInterceptor(new PaginationInnerInterceptor(DbType.MYSQL));
        return interceptor;
    }

}

分页查询

// controller
@ApiOperation("分页查询优惠券")
@GetMapping("page_coupon")
public JsonData pageCouponList(
    @ApiParam(value = "当前页") @RequestParam(value = "page", defaultValue = "1") int page,
    @ApiParam(value = "每页显示多少条") @RequestParam(value = "size", defaultValue = "10") int size
) {

    Map<String, Object> pageMap = couponService.pageCouponActivity(page, size);
    return JsonData.buildSuccess(pageMap);
}


//service
@Override
public Map<String, Object> pageCouponActivity(int page, int size) {

    Page<CouponDO> pageInfo = new Page<>(page, size);

    IPage<CouponDO> couponDOIPage = couponMapper.selectPage(pageInfo, new QueryWrapper<CouponDO>()
                                                            .eq("publish", CouponPublishEnum.PUBLISH)
                                                            .eq("category", CouponCategoryEnum.PROMOTION)
                                                            .orderByDesc("create_time"));


    Map<String, Object> pageMap = new HashMap<>(3);
    //总条数
    pageMap.put("total_record", couponDOIPage.getTotal());
    //总页数
    pageMap.put("total_page", couponDOIPage.getPages());

    pageMap.put("current_data", couponDOIPage.getRecords().stream().map(obj -> beanProcess(obj)).collect(Collectors.toList()));

    return pageMap;
}