网上商城项目SSM（七）——商品信息的增删改查

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/qq_40788630/article/details/85538675

在一般的网上商城系统中都会有商品信息的增删改查，本系统也一样

此功能实现按照 持久层——dao层——service层——controller层——jsp层

一、持久层实现

在com.po包中创建Goods持久化类，其详细代码如下所示：

package com.po;
import org.springframework.web.multipart.MultipartFile;
public class Goods {
	private Integer id;
	private String gname;
	private Double goprice;
	private Double grprice;
	private Integer gstore;
	private MultipartFile logoImage;
	private String gpicture;
	private Integer goodstype_id;
	private String typename;//查询时使用
	public Integer getId() {
		return id;
	}
	public void setId(Integer id) {
		this.id = id;
	}
	public String getGname() {
		return gname;
	}
	public void setGname(String gname) {
		this.gname = gname;
	}
	public Double getGoprice() {
		return goprice;
	}
	public void setGoprice(Double goprice) {
		this.goprice = goprice;
	}
	public Double getGrprice() {
		return grprice;
	}
	public void setGrprice(Double grprice) {
		this.grprice = grprice;
	}
	public Integer getGstore() {
		return gstore;
	}
	public void setGstore(Integer gstore) {
		this.gstore = gstore;
	}
	public MultipartFile getLogoImage() {
		return logoImage;
	}
	public void setLogoImage(MultipartFile logoImage) {
		this.logoImage = logoImage;
	}
	public String getGpicture() {
		return gpicture;
	}
	public void setGpicture(String gpicture) {
		this.gpicture = gpicture;
	}
	public Integer getGoodstype_id() {
		return goodstype_id;
	}
	public void setGoodstype_id(Integer goodstype_id) {
		this.goodstype_id = goodstype_id;
	}
	public String getTypename() {
		return typename;
	}
	public void setTypename(String typename) {
		this.typename = typename;
	}
	
}

二、dao层实现

dao层由dao层接口和mybatis的映射文件组成

在com.dao包中创建dao层接口AdminGoodsDao，其详细代码如下所示：

package com.dao;
import java.util.List;
import java.util.Map;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
import com.po.Goods;

@Repository("adminGoodsDao")
@Mapper
public interface AdminGoodsDao {
    public List<Goods> selectGoods();
    public List<Goods> selsectALLGoodsByPage(Map<String, Object> map);
    public int addGoods(Goods goods);
    public Goods selectGoodsById(Integer id);
    public int deleteGoods(List<Integer> ids);
    public int deleteAGoods(Integer id);
    public int updateGoodsById(Goods goods);
    public List<Map<String, Object>> selectCartGoods(Integer id);
	public List<Map<String, Object>> selectFocusGoods(Integer id);
	public List<Map<String, Object>> selectOrderdetailGoods(Integer id);
}

其与接口同名的映射文件详细代码如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.dao.AdminGoodsDao">
    <!-- 查询商品 -->
    <select id="selectGoods" resultType="Goods">
        select * from goodstable
    </select>
    <!-- 分页查询商品 -->
    <select id="selectALLGoodsByPage" resultType="Goods" parameterType="map">
        select * from goodstable order by id limit #{startIndex},#{perPageSize}
    </select>
    <!-- 添加商品 -->
    <insert id="addGoods" parameterType="Goods">
        insert into goodstable (id,gname,goprice,grprice,gstore,gpicture,goodstype_id) 
		values (null, #{gname}, #{goprice}, #{grprice}, #{gstore}, #{gpicture}, #{goodstype_id})
	</insert>
	<!-- 根据id查询商品 -->
	<select id="selectGoodsById" resultType="Goods" parameterType="Integer">
	    select gt.*,gy.typename from goodstable gt,goodstype gy where gt.id=#{id} and gt.goodstype_id = gy.id
	</select>
    <!-- 删除多个商品 -->
    <delete id="deleteGoods"  parameterType="List">
		delete from goodstable where id in
		<foreach item="item" index="index" collection="list"
		open="(" separator="," close=")">
			#{item}
		</foreach>
	</delete>
	<!-- 删除单个商品 -->
	<delete id="deleteAGoods" parameterType="Integer">
		delete from goodstable where id=#{id}
	</delete>
	<!-- 修改一个商品 -->
	<update id="updateGoodsById" parameterType="Goods">
    update goodstable
    <set>
      <if test="gname != null">
        gname = #{gname},
      </if>
      <if test="goprice != null">
        goprice = #{goprice},
      </if>
      <if test="grprice != null">
        grprice = #{grprice},
      </if>
      <if test="gstore != null">
        gstore = #{gstore},
      </if>
      <if test="gpicture != null">
        gpicture = #{gpicture},
      </if>
      <if test="goodstype_id != null">
        goodstype_id = #{goodstype_id},
      </if>
    </set>
    	where id = #{id}
    </update>  
    <!-- 查询关联商品 -->
    <select id="selectCartGoods" parameterType="Integer" resultType="map">
  	    select * from carttable where goodstable_id=#{id}
    </select>
    <select id="selectFocusGoods" parameterType="Integer" resultType="map">
  	    select * from focustable where goodstable_id=#{id}
    </select>
    <select id="selectOrderdetailGoods" parameterType="Integer" resultType="map">
  	    select * from orderdetail where goodstable_id=#{id}
    </select>
</mapper>

三、业务层service层实现

此层由service接口以及其实现类组成，

在com.service.admin包中创建AdminGoodsService接口，其详细代码如下所示：

package com.service.admin;
import javax.servlet.http.HttpServletRequest;
import org.springframework.ui.Model;
import com.po.Goods;

public interface AdminGoodsService {
    public String selectAGoods(Model model,Integer id,String act);
    public String deleteGoods(Integer ids[],Model model);
    public String deleteAGoods(Integer id,Model model);
    public String addOrUpdateGoods(Goods goods,HttpServletRequest request,String updateAct);
    public String selectGoods(Model model,Integer pageCur,String act);
}

在com.service.admin包中创建其对应的接口实现类AdminGoodsServiceImpl，其详细代码如下所示：

package com.service.admin;

import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.ui.Model;

import com.dao.AdminGoodsDao;
import com.po.Goods;
import com.util.MyUtil;
@Service("adminGoodsService")
@Transactional
public class AdminGoodsServiceImpl implements AdminGoodsService {
    @Autowired
    private AdminGoodsDao adminGoodsDao;
    //查询一个商品
	@Override
	public String selectAGoods(Model model, Integer id, String act) {
		Goods agoods = adminGoodsDao.selectGoodsById(id);
		model.addAttribute("goods", agoods);
		//修改页面
		if("updateAgoods".equals(act)){
			return "admin/updateAgoods";
		}
		//详情页面
		return "admin/goodsDetail";
	}

	@Override
	public String deleteGoods(Integer[] ids, Model model) {
		List<Integer> list = new ArrayList<Integer>();
		for (int i = 0; i < ids.length; i++) {
			//商品有关联
			if(adminGoodsDao.selectCartGoods(ids[i]).size() > 0 ||
					adminGoodsDao.selectFocusGoods(ids[i]).size() > 0 || 
					adminGoodsDao.selectOrderdetailGoods(ids[i]).size() > 0) {
				model.addAttribute("msg", "商品有关联，不允许删除！");
				return "forward:/adminGoods/selectGoods?act=deleteSelect";
			}
			list.add(ids[i]);
		}
		adminGoodsDao.deleteGoods(list);
		model.addAttribute("msg", "成功删除商品！");
		return "forward:/adminGoods/selectGoods?act=deleteSelect";
	}

	@Override
	public String deleteAGoods(Integer id, Model model) {
		//商品有关联
		if(adminGoodsDao.selectCartGoods(id).size() > 0 ||
				adminGoodsDao.selectFocusGoods(id).size() > 0 || 
				adminGoodsDao.selectOrderdetailGoods(id).size() > 0) {
			model.addAttribute("msg", "商品有关联，不允许删除！");
			return "forward:/adminGoods/selectGoods?act=deleteSelect";
		}
		adminGoodsDao.deleteAGoods(id);
		model.addAttribute("msg", "成功删除商品！");
		return "forward:/adminGoods/selectGoods?act=deleteSelect";
	}

	@Override
	public String addOrUpdateGoods(Goods goods, HttpServletRequest request, String updateAct) {
		/*上传文件的保存位置"/logos"，该位置是指
		workspace\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\wtpwebapps，
		发布后使用*/
		//防止文件名重名
		String newFileName = "";
		String fileName = goods.getLogoImage().getOriginalFilename(); 
		//选择了文件
		if(fileName.length() > 0){
			String realpath = request.getServletContext().getRealPath("logos");
			//实现文件上传
			String fileType = fileName.substring(fileName.lastIndexOf('.'));
			//防止文件名重名
			newFileName = MyUtil.getStringID() + fileType;
			goods.setGpicture(newFileName);
			File targetFile = new File(realpath, newFileName); 
			if(!targetFile.exists()){  
	            targetFile.mkdirs();  
	        } 
			//上传 
	        try {   
	        	goods.getLogoImage().transferTo(targetFile);
	        } catch (Exception e) {  
	            e.printStackTrace();  
	        }  
		}
		//修改
		if("update".equals(updateAct)){//updateAct不能与act重名，因为使用了转发
			//修改到数据库
	       if(adminGoodsDao.updateGoodsById(goods) > 0){
	        	return "forward:/adminGoods/selectGoods?act=updateSelect";
	        }else{
	        	return "/adminGoods/updateAgoods";
	       }
		}else{//添
			//保存到数据库
			if(adminGoodsDao.addGoods(goods) > 0){
				//转发到查询的controller
				return "forward:/adminGoods/selectGoods";
			}else{
				return "card/addCard";
			}
		}
	}

	@Override
	public String selectGoods(Model model, Integer pageCur, String act) {
		List<Goods> allGoods = adminGoodsDao.selectGoods();
		int temp = allGoods.size();
		model.addAttribute("totalCount", temp);
		int totalPage = 0;
		if (temp == 0) {
			totalPage = 0;//总页数
		} else {
			//返回大于或者等于指定表达式的最小整数
			totalPage = (int) Math.ceil((double) temp / 10);
		}
		if (pageCur == null) {
			pageCur = 1;
		}
		if ((pageCur - 1) * 10 > temp) {
			pageCur = pageCur - 1;
		}
		//分页查询
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("startIndex", (pageCur - 1) * 10);//起始位置
		map.put("perPageSize", 10);//每页10个
		allGoods = adminGoodsDao.selectAllGoodsByPage(map);
		model.addAttribute("allGoods", allGoods);
		model.addAttribute("totalPage", totalPage);
		model.addAttribute("pageCur", pageCur);
		//删除查询
		if("deleteSelect".equals(act)){
			return "admin/deleteSelectGoods";
		}
		//修改查询
		else if("updateSelect".equals(act)){
			return "admin/updateSelectGoods";
		}else{
			return "admin/selectGoods";
		}
	}

}

四、控制层实现

在com.controller.admin包中创建AdminGoodsController，其详细代码如下所示：

package com.controller.admin;
import javax.servlet.http.HttpServletRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import com.po.Goods;
import com.service.admin.AdminGoodsService;

@Controller
@RequestMapping("/adminGoods")
public class AdminGoodsController extends BaseController{
    @Autowired
    private AdminGoodsService adminGoodsService;
    //查询所有商品
    @RequestMapping("/selectGoods")
    public String aeleceGoods(Model model,Integer pageCur,String act) {
    	return adminGoodsService.selectGoods(model, pageCur, act);
    }
    //页面初始化
    @RequestMapping("/toAddGoods")
    public String toAddGoods(Model model) {
    	model.addAttribute("goods",new Goods());
    	return "admin/addGoods";
    }
    //添加或修改
    @RequestMapping("/addGoods")
    public String addGoods(@ModelAttribute Goods goods,HttpServletRequest request ,String updateAct) {
    	return adminGoodsService.addOrUpdateGoods(goods, request, updateAct);
    }
    //查询一个名片
    @RequestMapping("/selectAGoods")
    public String selectAGoods(Model model ,Integer id,String act) {
    	return adminGoodsService.selectAGoods(model, id, act);
    }
    //删除多个商品
    @RequestMapping("/deleteGoods")
    public String deleteGoods(Integer ids[],Model model) {
    	return adminGoodsService.deleteGoods(ids, model);
    }
    //删除一个商品
    @RequestMapping("/deleteAGoods")
    public String deleteAGoods(Integer id,Model model) {
    	return adminGoodsService.deleteAGoods(id, model);
    }
}

五、实现jsp层

本层共需要实现六个jsp页面，分别是：添加addGoods.jsp——商品详情GoodsDetail.jsp——查询selectGoods.jsp——修改查询页面updateSelectGoods.jsp——修改updateGoods.jsp——删除deleteGoods.jsp

由于篇幅过长就不一一详列，（全部源码）

到这，关于商品的增删改查所有操作算是实现了

实现的页面如图所示：