一：获取销售属性列表

1.编辑AttrController的baseAttrList方法

   /**
     * 通过catelogId获取数据
     * @return
     * @RequestParam Map<String, Object> params 表示分页参数
     */
    @GetMapping(value = "/{attrType}/list/{catelogId}")
    public R baseAttrList(@RequestParam Map<String, Object> params,@PathVariable("catelogId") Long catelogId , @PathVariable("attrType") String type ){
        PageUtils page = attrService.querBaseAttrPage(params,catelogId,type);
        return R.ok().put("page", page);
    }

2.编辑AttrServiceImpl的querBaseAttrPage方法

@Override
    public PageUtils querBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>().eq("attr_type","base".equalsIgnoreCase(type)?1:0);
        //当catelogId等于0时，默认查询所有数据
        if(catelogId != 0){
            queryWrapper.eq("catelog_id",catelogId);
        }
        //获取模糊查询参数
        String key = (String) params.get("key");
        if(StringUtils.isNotEmpty(key)){
            queryWrapper.and((wrapper)->{
                wrapper.eq("attr_id",key).or().like("attr_name",key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params),queryWrapper);
        PageUtils pageUtils = new PageUtils(page);
        //将获取到的page数据提取出来
        List<AttrEntity> records = page.getRecords();
        List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
            AttrRespVo attrRespVo = new AttrRespVo();
            //将遍历的数据，全部放到attrRespVo对象中
            BeanUtils.copyProperties(attrEntity, attrRespVo);
            //1.设置分组名称
            if ("base".equalsIgnoreCase(type)){
                AttrAttrgroupRelationEntity attr =
                        relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
                if (attr != null) {
                    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attr.getAttrGroupId());
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
            //2.设置分类名称
            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }
            return attrRespVo;
        }).collect(Collectors.toList());
        pageUtils.setList(respVos);
        return pageUtils;
    }

3.查看列表

二：保存更新方法优化

1.在common新建常量包constant，并且新建ProductConstant类

package com.sysg.common.constant;

public class ProductConstant {
    public enum AttrEnum{
        ATTR_TYPE_BASE(1,"基本属性"),ATTR_TYPE_SALE(0,"销售属性");
        private int code;
        private String msg;
        /**
         * 构造器
         */
        AttrEnum(int code,String msg){
            this.code = code;
            this.msg = msg;
        }

        public int getCode() {
            return code;
        }

        public String getMsg() {
            return msg;
        }
    }

}

2.编辑AttrServiceImpl

package com.sysg.gulimail.product.service.impl;

import com.baomidou.mybatisplus.core.conditions.update.UpdateWrapper;
import com.sysg.common.constant.ProductConstant;
import com.sysg.gulimail.product.dao.AttrAttrgroupRelationDao;
import com.sysg.gulimail.product.dao.AttrGroupDao;
import com.sysg.gulimail.product.dao.CategoryDao;
import com.sysg.gulimail.product.entity.AttrAttrgroupRelationEntity;
import com.sysg.gulimail.product.entity.AttrGroupEntity;
import com.sysg.gulimail.product.entity.CategoryEntity;
import com.sysg.gulimail.product.service.CategoryService;
import com.sysg.gulimail.product.vo.AttrRespVo;
import com.sysg.gulimail.product.vo.AttrVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

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

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.sysg.common.utils.PageUtils;
import com.sysg.common.utils.Query;

import com.sysg.gulimail.product.dao.AttrDao;
import com.sysg.gulimail.product.entity.AttrEntity;
import com.sysg.gulimail.product.service.AttrService;
import org.springframework.transaction.annotation.Transactional;


@Service("attrService")
public class AttrServiceImpl extends ServiceImpl<AttrDao, AttrEntity> implements AttrService {
    /**
     * 关联关系的dao
     */
    @Autowired
    private AttrAttrgroupRelationDao relationDao;
    /**
     * 注入分组dao
     */
    @Autowired
    private AttrGroupDao attrGroupDao;
    /**
     * 注入分类dao
     */
    @Autowired
    private CategoryDao categoryDao;
    /**
     * 注入categoryService
     */
    @Autowired
    private CategoryService categoryService;
    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        IPage<AttrEntity> page = this.page(
                new Query<AttrEntity>().getPage(params),
                new QueryWrapper<AttrEntity>()
        );

        return new PageUtils(page);
    }
    @Transactional
    @Override
    public void saveAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr,attrEntity);
        //1.保存基本数据
        this.save(attrEntity);
        //2.保存关联关系
        if (attr.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()){
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            //属性分组的id
            relationEntity.setAttrGroupId(attr.getAttrGroupId());
            //属性的id
            relationEntity.setAttrId(attrEntity.getAttrId());
            relationDao.insert(relationEntity);
        }
    }

    @Override
    public PageUtils querBaseAttrPage(Map<String, Object> params, Long catelogId, String type) {
        QueryWrapper<AttrEntity> queryWrapper = new QueryWrapper<AttrEntity>()
                .eq("attr_type","base".equalsIgnoreCase(type)?ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode():ProductConstant.AttrEnum.ATTR_TYPE_SALE.getCode());
        //当catelogId等于0时，默认查询所有数据
        if(catelogId != 0){
            queryWrapper.eq("catelog_id",catelogId);
        }
        //获取模糊查询参数
        String key = (String) params.get("key");
        if(StringUtils.isNotEmpty(key)){
            queryWrapper.and((wrapper)->{
                wrapper.eq("attr_id",key).or().like("attr_name",key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params),queryWrapper);
        PageUtils pageUtils = new PageUtils(page);
        //将获取到的page数据提取出来
        List<AttrEntity> records = page.getRecords();
        List<AttrRespVo> respVos = records.stream().map((attrEntity) -> {
            AttrRespVo attrRespVo = new AttrRespVo();
            //将遍历的数据，全部放到attrRespVo对象中
            BeanUtils.copyProperties(attrEntity, attrRespVo);
            //1.设置分组名称
            if ("base".equalsIgnoreCase(type)){
                AttrAttrgroupRelationEntity attr =
                        relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrEntity.getAttrId()));
                if (attr != null) {
                    AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attr.getAttrGroupId());
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
            //2.设置分类名称
            CategoryEntity categoryEntity = categoryDao.selectById(attrEntity.getCatelogId());
            if (categoryEntity != null) {
                attrRespVo.setCatelogName(categoryEntity.getName());
            }
            return attrRespVo;
        }).collect(Collectors.toList());
        pageUtils.setList(respVos);
        return pageUtils;
    }

    @Override
    public AttrRespVo getAttrInfo(Long attrId) {
        AttrRespVo attrRespVo = new AttrRespVo();
        //查询当前属性的详细信息
        AttrEntity attrEntity = this.getById(attrId);
        BeanUtils.copyProperties(attrEntity,attrRespVo);
        if(attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()){
            //获取分组id并且封装attrRespVo
            AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = relationDao.selectOne(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attrId));
            if( attrAttrgroupRelationEntity != null){
                attrRespVo.setAttrGroupId(attrAttrgroupRelationEntity.getAttrGroupId());
                AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrAttrgroupRelationEntity.getAttrGroupId());
                if( attrGroupEntity != null ){
                    attrRespVo.setGroupName(attrGroupEntity.getAttrGroupName());
                }
            }
        }
        //获取三级分类完整路径并且封装attrRespVo
        Long catelogId = attrEntity.getCatelogId();
        Long[] categlogPath = categoryService.findCateglogPath(catelogId);
        if( categlogPath != null || categlogPath.length > 0){
            attrRespVo.setCatelogPath(categlogPath);
        }
        CategoryEntity categoryEntity = categoryDao.selectById(catelogId);
        if( categoryEntity != null ){
            attrRespVo.setCatelogName(categoryEntity.getName());
        }

        return attrRespVo;
    }
    @Transactional
    @Override
    public void updateAttr(AttrVo attr) {
        AttrEntity attrEntity = new AttrEntity();
        BeanUtils.copyProperties(attr,attrEntity);
        if(attrEntity.getAttrType() == ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode()){
            //1.修改基本数据
            this.updateById(attrEntity);
            AttrAttrgroupRelationEntity attrAttrgroupRelationEntity = new AttrAttrgroupRelationEntity();
            attrAttrgroupRelationEntity.setAttrGroupId(attr.getAttrGroupId());
            attrAttrgroupRelationEntity.setAttrId(attr.getAttrId());
            Integer count = relationDao.selectCount(new QueryWrapper<AttrAttrgroupRelationEntity>().eq("attr_id", attr.getAttrId()));
            //2.修改分组关联
            if( count > 0){
                //编辑保存
                relationDao.update(attrAttrgroupRelationEntity,new UpdateWrapper<AttrAttrgroupRelationEntity>().eq("attr_id",attr.getAttrId()));
            } else {
                //新增保存
                relationDao.insert(attrAttrgroupRelationEntity);
            }
        }

    }

}

注：只有分组的时候需要更新，分类不需要

三：分组与属性关联

1.编辑AttrGroupController的attrRelation方法

   /**
     * 根据分组id查找关联的所有基本属性
     * @param attrgroupId
     * @return
     */
    @GetMapping("/{attrgroupId}/attr/relation")
    public R attrRelation(@PathVariable("attrgroupId") Long attrgroupId){
        List<AttrEntity> entityList = attrService.getRelationAttr(attrgroupId);
        return R.ok().put("data",entityList);
    }

2.编辑AttrServiceImpl的getRelationAttr方法

 /**
     * 根据分组id查找关联的所有基本属性
     * @param attrgroupId
     * @return
     */
    @Override
    public List<AttrEntity> getRelationAttr(Long attrgroupId) {
        QueryWrapper<AttrAttrgroupRelationEntity> wrapper = new QueryWrapper<>();
        wrapper.eq("attr_group_id",attrgroupId);
        List<AttrAttrgroupRelationEntity> entities = relationDao.selectList(wrapper);
        List<Long> attrIds = entities.stream().map((attr) -> {
            return attr.getAttrGroupId();
        }).collect(Collectors.toList());
        if(attrIds == null || attrIds.size() == 0){
            return null;
        }
        Collection<AttrEntity> attrEntities = this.listByIds(attrIds);
        return (List<AttrEntity>) attrEntities;
    }

四：移除功能实现

1.在Vo包下新建AttrGroupRelationVo类

package com.sysg.gulimail.product.vo;
import lombok.Data;
@Data
public class AttrGroupRelationVo {
    /**
     * 属性id
     */
    private Long attrId;
    /**
     * 属性分组id
     */
    private Long attrGroupId;
}

2.在AttrGroupController新建deleteRelation方法

 /**
     * 批量删除关系表
     * @param vos
     * @return
     */
    @PostMapping("/attr/relation/delete")
    public R deleteRelation(AttrGroupRelationVo[] vos){
        attrService.deleteRelation(vos);
        return R.ok();
    }

3.编辑AttrServiceImpl的deleteRelation方法

@Override
    public void deleteRelation(AttrGroupRelationVo[] vos) {
        List<AttrGroupRelationVo> list = Arrays.asList(vos);
        List<AttrAttrgroupRelationEntity> entities = list.stream().map((item) -> {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(item, relationEntity);
            return relationEntity;
        }).collect(Collectors.toList());
        relationDao.deleteBatchRelation(entities);
    }

五：获取属性分组没有关联的其他属性

1.编辑AttrGroupController的attrNoRelation方法

/**
     * 根据分组id查找没有关联的所有基本属性
     * @param attrgroupId
     * @return
     */
    @GetMapping("/{attrgroupId}/noattr/relation")
    public R attrNoRelation(@PathVariable("attrgroupId") Long attrgroupId , @RequestParam Map<String, Object> params){
        PageUtils page = attrService.getNoRelationAttr(params,attrgroupId);
        return R.ok().put("page",page);
    }

2.编辑AttrServiceImpl的getNoRelationAttr方法

 /**
     * 获取当前分组没有关联的所有基本属性
     * @param params
     * @param attrgroupId
     * @return
     */
    @Override
    public PageUtils getNoRelationAttr(Map<String, Object> params, Long attrgroupId) {
        //1.当前分组只能关联自己所属分类里面的所有属性
        AttrGroupEntity attrGroupEntity = attrGroupDao.selectById(attrgroupId);
        Long catelogId = attrGroupEntity.getCatelogId();
        //2.当前分组只能关联别的分组没有引用的属性
        //2.1 找到当前分类下的其他分组
        List<AttrGroupEntity> entities = attrGroupDao.selectList(new QueryWrapper<AttrGroupEntity>().
                eq("catelog_id", catelogId).ne("attr_group_id",attrgroupId));
        List<Object> list = entities.stream().map((item)->{
            return item.getAttrGroupId();
        }).collect(Collectors.toList());
        //2.2这些分组关联的属性
        List<AttrAttrgroupRelationEntity> groupId = relationDao.selectList(new QueryWrapper<AttrAttrgroupRelationEntity>().in("attr_group_id", list));
        List<Long> attrIds = groupId.stream().map((item)->{
            return item.getAttrId();
        }).collect(Collectors.toList());
        //2.3从当前分类的属性表中去除掉这些属性
        QueryWrapper<AttrEntity> wrapper = new QueryWrapper<AttrEntity>().eq("catelog_id", catelogId).eq("attr_type",ProductConstant.AttrEnum.ATTR_TYPE_BASE.getCode());
        if( attrIds != null && attrIds.size() > 0 ){
            wrapper.notIn("attr_id",attrIds);
        }
        String key = (String) params.get("key");
        if(!StringUtils.isEmpty(key)){
            wrapper.and((w)->{
              w.eq("attr_id",key).or().like("attr_name",key);
            });
        }
        IPage<AttrEntity> page = this.page(new Query<AttrEntity>().getPage(params), wrapper);
        PageUtils pageUtils = new PageUtils(page);
        return pageUtils;
    }

六：确认新增后回显到关联页面

1.编辑AttrGroupController的addRelation方法

/**
     * 新增关联关系
     * @param vos
     * @return
     */
    @PostMapping("/attr/relation")
    public R addRelation(@RequestBody List<AttrGroupRelationVo> vos){
        relationService.saveBatch(vos);
        return R.ok();
    }

2.编辑AttrAttrgroupRelationServiceImpl的saveBatch方法

 @Override
    public void saveBatch(List<AttrGroupRelationVo> vos) {
        List<AttrAttrgroupRelationEntity> collect = vos.stream().map(item -> {
            AttrAttrgroupRelationEntity relationEntity = new AttrAttrgroupRelationEntity();
            BeanUtils.copyProperties(item, relationEntity);
            return relationEntity;
        }).collect(Collectors.toList());
        this.saveBatch(collect);
    }