新版MybatisPlus分页插件配置

import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.PaginationInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class MybaticPlusPageConfig {

    /**
     * 旧版的操作
     */
    //    @Bean
//    public PaginationInterceptor paginationInterceptor(){
//        return new PaginationInterceptor();
//    }


    /**
     * 新版的分页插件配置
     * @return
     */
    @Bean
    public MybatisPlusInterceptor mybatisPlusInterceptor(){

        MybatisPlusInterceptor mybatisPlusInterceptor = new MybatisPlusInterceptor();
        mybatisPlusInterceptor.addInnerInterceptor(new PaginationInnerInterceptor());
        return mybatisPlusInterceptor;
    }
}

import net.xdclass.utils.JsonData;
import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RestController;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import net.xdclass.service.CouponService;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.Map;


@RestController
@RequestMapping("/api/v1/coupon")
@Api("优惠券模块")
public class CouponController {

    @Autowired
    private CouponService couponService;


    @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);
    }
}

public interface CouponService extends IService<CouponDO> {

    /**
     * 分页查询优惠券
     * @param page
     * @param size
     * @return
     */
    Map<String,Object> pageCouponActivity(int page, int size);
}

import net.xdclass.enums.CouponCategoryEnum;
import net.xdclass.enums.CouponPublishEnum;
import net.xdclass.model.CouponDO;
import net.xdclass.mapper.CouponMapper;
import net.xdclass.service.CouponService;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import net.xdclass.vo.CouponVO;
import org.springframework.stereotype.Service;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import io.swagger.annotations.ApiParam;
import lombok.extern.slf4j.Slf4j;

import net.xdclass.mapper.CouponMapper;
import net.xdclass.model.CouponDO;
import net.xdclass.service.CouponService;

import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j

public class CouponServiceImpl extends ServiceImpl<CouponMapper, CouponDO> implements CouponService {
    @Autowired
    private CouponMapper couponMapper;

    @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>()
                //优惠券状态   比如说什么下架呀，正在上架等
                .eq("publish", CouponPublishEnum.PUBLISH)
                //优惠券类型  如：新人卷，任务卷，营销卷等
                .eq("category", CouponCategoryEnum.PROMOTION)
                //简单的排序 降序
                .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());
        //因为我们不想要将所有东西发出去给用户，所以这里进行转换一下
        pageMap.put("current_data",couponDOIPage.getRecords().stream().map(obj->beanProcess(obj)).collect(Collectors.toList()));


        return pageMap;
    }

    private CouponVO beanProcess(CouponDO couponDO) {
        CouponVO couponVO = new CouponVO();
        BeanUtils.copyProperties(couponDO,couponVO);
        return couponVO;
    }
}

public enum CouponCategoryEnum {

    /**
     * 新人注册
     */
    NEW_USER,

    /**
     * 活动任务
     */
    TASK,

    /**
     * 促销劵
     */
    PROMOTION


}

/**
 * 优惠券状态
 */
public enum CouponPublishEnum {

    /**
     * 线上
     */
    PUBLISH,

    /**
     * 草稿
     */
    DRAFT,

    /**
     * 下线
     */
    OFFLINE
}

@Data
public class CouponVO {


    /**
     * id
     */
    private Long id;

    /**
     * 优惠卷类型[NEW_USER注册赠券，TASK任务卷，PROMOTION促销劵]
     */
    private String category;



    /**
     * 优惠券图片
     */
    @JsonProperty("coupon_img")
    private String couponImg;

    /**
     * 优惠券标题
     */
    @JsonProperty("coupon_title")
    private String couponTitle;

    /**
     * 抵扣价格
     */
    private BigDecimal price;

    /**
     * 每人限制张数
     */
    @JsonProperty("user_limit")
    private Integer userLimit;

    /**
     * 优惠券开始有效时间
     */
    @JsonFormat(pattern = "yyyy-MM-dd hh:mm:ss",locale = "zh",timezone = "GMT+8")
    @JsonProperty("start_time")
    private Date startTime;

    /**
     * 优惠券失效时间
     */
    @JsonFormat(pattern = "yyyy-MM-dd hh:mm:ss",locale = "zh",timezone = "GMT+8")
    @JsonProperty("end_time")
    private Date endTime;

    /**
     * 优惠券总量
     */
    @JsonProperty("publish_count")
    private Integer publishCount;

    /**
     * 库存
     */
    private Integer stock;



    /**
     * 满多少才可以使用
     */
    @JsonProperty("condition_price")
    private BigDecimal conditionPrice;

}