ssm+dubbo实战项目青橙电商.zip

package com.qingcheng.service.impl; import com.alibaba.dubbo.config.annotation.Service; import com.github.pagehelper.Page; import com.github.pagehelper.PageHelper; import com.qingcheng.dao.BrandMapper; import com.qingcheng.entity.PageResult; import com.qingcheng.pojo.goods.Brand; import com.qingcheng.service.goods.BrandService; import org.springframework.beans.factory.annotation.Autowired; import tk.mybatis.mapper.entity.Example; import java.util.List; import java.util.Map; /*这个注解我们需要选择dubbo下面的,不要选错了*/ @Service public class BrandServiceImpl implements BrandService { @Autowired private BrandMapper brandMapper; @Override public List<Brand> findAll() { return brandMapper.selectAll(); } @Override public PageResult<Brand> findPage(int page, int size) { PageHelper.startPage(page,size); Page<Brand> pageResult = (Page<Brand>) brandMapper.selectAll(); return new PageResult<Brand>(pageResult.getTotal(), pageResult.getResult()); } /*构建map根据条件查询*/ @Override public List<Brand> findList(Map<String, Object> searchMap) { Example example = creatExample(searchMap); return brandMapper.selectByExample(example); } private Example creatExample(Map<String, Object> searchMap) { /*这里有一个需要注意的点:因为用了通用Mapper的原因,所以我们的实体类都是Object类型的,否则就不能根据相关条件进行查询了*/ /*参考https://blog.csdn.net/Rebirth321/article/details/88174084*/ /*还有Date。 通用Mapper不识别java.sql.Date,只识别java.util.Date*/ Example example = new Example(Brand.class); Example.Criteria criteria = example.createCriteria(); if (searchMap != null) { if (searchMap.get("name") != null && !"".equals(searchMap.get("name"))) { criteria.andLike("name","%"+(String)searchMap.get("name")+"%"); } if(searchMap.get("letter") != null && !"".equals(searchMap.get("letter"))) { criteria.andEqualTo("letter",(String)searchMap.get("letter")); } } return example; } /*根据分页+条件查询*/ @Override public PageResult<Brand> findPage(Map<String, Object> searchMap, int page, int size) { PageHelper.startPage(page,size); Example example = creatExample(searchMap); Page<Brand> brands = (Page<Brand>) brandMapper.selectByExample(example); return new PageResult<Brand>(brands.getTotal(), brands.getResult()); } /*根据id查询,注意id的类型要和实体类中的一样,是Integer*/ @Override public Brand findById(Integer id) { return brandMapper.selectByPrimaryKey(id); } /*新增*/ @Override public void add(Brand brand) { brandMapper.insert(brand); } /*修改*/ @Override public void update(Brand brand) { brandMapper.updateByPrimaryKeySelective(brand); } /*删除*/ @Override public void delete(Integer id) { brandMapper.deleteByPrimaryKey(id); } }