用模版做网站的好处和坏处,自己做网站卖产品怎么样,域名注册申请,杭州科技公司概念
本文讲解和实现网上蛋糕商城的后台管理系统中的商品管理功能。
商品列表
点击后台管理系统的head.jsp头部的“商品管理”功能选项#xff0c;向服务器发送请求/admin/goods_list 因此需要在servlet包中创建AdminGoodsListServlet类#xff0c;用于获取商品信息列表
…概念
本文讲解和实现网上蛋糕商城的后台管理系统中的商品管理功能。
商品列表
点击后台管理系统的head.jsp头部的“商品管理”功能选项向服务器发送请求/admin/goods_list 因此需要在servlet包中创建AdminGoodsListServlet类用于获取商品信息列表
package servlet;import model.Page;
import service.GoodsService;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;WebServlet(name admin_goods_list,urlPatterns /admin/goods_list)
public class AdminGoodsListServlet extends HttpServlet {private GoodsService gService new GoodsService();/*** see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)*/protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {int type 0;//推荐类型if(request.getParameter(type) ! null) {typeInteger.parseInt(request.getParameter(type) ) ;}int pageNumber 1;if(request.getParameter(pageNumber) ! null) {try {pageNumberInteger.parseInt(request.getParameter(pageNumber) ) ;}catch (Exception e){}}if(pageNumber0)pageNumber1;Page p gService.getGoodsRecommendPage(type, pageNumber);if(p.getTotalPage()0){p.setTotalPage(1);p.setPageNumber(1);}else {if(pageNumberp.getTotalPage()1){p gService.getGoodsRecommendPage(type, pageNumber);}}request.setAttribute(p, p);request.setAttribute(type, type);request.getRequestDispatcher(/admin/goods_list.jsp).forward(request, response);}/*** see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)*/protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubdoGet(request, response);}
}
以上代码中接收浏览器请求并判断浏览器是否传递了分类参数商品分类为条幅热销新品等如果没有传递分类参数则默认获取所有商品信息并分页显示将参数传递给业务逻辑层这里功能已经实现了则不再重复赘述。最后将查询的数据显示在goods_list.jsp页面上
% page languagejava contentTypetext/html; charsetutf-8pageEncodingutf-8%
% taglib urihttp://java.sun.com/jsp/jstl/core prefixc %
!DOCTYPE html
html
headtitle商品列表/titlemeta charsetutf-8/link relstylesheet hrefcss/bootstrap.css/
/head
body
div classcontainer-fluidjsp:include page/admin/header.jsp/jsp:includediv classtext-righta classbtn btn-warning href/admin/goods_add.jsp添加商品/a/divbrul roletablist classnav nav-tabsli c:if test${type0 }classactive/c:if rolepresentationa href/admin/goods_list全部商品/a/lili c:if test${type1 }classactive/c:if rolepresentationa href/admin/goods_list?type1条幅推荐/a/lili c:if test${type2 }classactive/c:if rolepresentationa href/admin/goods_list?type2热销推荐/a/lili c:if test${type3 }classactive/c:if rolepresentationa href/admin/goods_list?type3新品推荐/a/li/ulbrtable classtable table-bordered table-hovertrth width5%ID/thth width10%图片/thth width10%名称/thth width20%介绍/thth width10%价格/thth width10%类目/thth width25%操作/th/trc:forEach items${p.list } vargtrtdp${g.id }/p/tdtdpa href/goods_detail?id${g.id} target_blankimg src${g.cover} width100px height100px/a/p/tdtdpa href/goods_detail?id${g.id} target_blank${g.name}/a/p/tdtdp${g.intro}/p/tdtdp${g.price}/p/tdtdp${g.type.name}/p/tdtdpc:choosec:when test${g.isScroll }a classbtn btn-info href/admin/goods_recommend?id${g.id }methodremovetypeTarget1pageNumber${p.pageNumber}type${type}移出条幅/a/c:whenc:otherwisea classbtn btn-primary href/admin/goods_recommend?id${g.id }methodaddtypeTarget1pageNumber${p.pageNumber}type${type}加入条幅/a/c:otherwise/c:choosec:choosec:when test${g.isHot }a classbtn btn-info href/admin/goods_recommend?id${g.id }methodremovetypeTarget2pageNumber${p.pageNumber}type${type}移出热销/a/c:whenc:otherwisea classbtn btn-primary href/admin/goods_recommend?id${g.id }methodaddtypeTarget2pageNumber${p.pageNumber}type${type}加入热销/a/c:otherwise/c:choosec:choosec:when test${g.isNew }a classbtn btn-info href/admin/goods_recommend?id${g.id }methodremovetypeTarget3pageNumber${p.pageNumber}type${type}移出新品/a/c:whenc:otherwisea classbtn btn-primary href/admin/goods_recommend?id${g.id }methodaddtypeTarget3pageNumber${p.pageNumber}type${type}加入新品/a/c:otherwise/c:choose/pa classbtn btn-success href/admin/goods_editshow?id${g.id } pageNumber${p.pageNumber}type${type}修改/aa classbtn btn-danger href/admin/goods_delete?id${g.id }pageNumber${p.pageNumber}type${type}删除/a/td/tr/c:forEach/tablebrjsp:include page/page.jspjsp:param value/admin/goods_list nameurl/jsp:param valuetype${type } nameparam//jsp:includebr
/div
/body
/html 以上页面代码中通过分支语句判断每一个商品的类型来区分该商品是加入还是移出的按钮文本信息。
当用户点击条幅推荐热销推荐新品推荐时则还是向以上服务器地址发送请求只不过这里需要携带分类参数。
加入移出分类
每一个商品都有可能加入条幅热销新品等分类加入的了商品也有可能移出条幅热销和新品分类没有任何一个商品永久性的进行促销活动因此每一个商品都有可能进行加入某一个分类或者移出某一个分类。
这里当点击加入或者移出条幅热销和新品分类时向服务器发送请求地址/admin/goods_recommend并携带商品编号页码加入还是移出参数分类参数等等
因此需要在servlet包中创建AdminGoodsRecommendServlet类完成以上功能
package servlet;import service.GoodsService;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;WebServlet(name admin_goods_recommend,urlPatterns /admin/goods_recommend)
public class AdminGoodsRecommendServlet extends HttpServlet {private GoodsService gService new GoodsService();/*** see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)*/protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {int id Integer.parseInt(request.getParameter(id));String method request.getParameter(method);int typeTargetInteger.parseInt(request.getParameter(typeTarget));if(method.equals(add)) {gService.addRecommend(id, typeTarget);}else {gService.removeRecommend(id, typeTarget);}request.getRequestDispatcher(/admin/goods_list).forward(request, response);}/*** see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)*/protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubdoGet(request, response);}
}
以上代码中根据浏览器传递的method参数是add还是remove还区分是加入分类还是移出分类操作这里需要将参数信息发送给业务逻辑层执行
//将某个商品分类添加至标识
public void addRecommend(int id,int type) {try {gDao.addRecommend(id, type);} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}
}
//将某个商品删除标识
public void removeRecommend(int id,int type) {try {gDao.removeRecommend(id, type);} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}
}
接着业务逻辑层将执行的参数传递给数据访问层执行
public void addRecommend(int id,int type) throws SQLException {QueryRunner r new QueryRunner(DataSourceUtils.getDataSource());String sql insert into recommend(type,goods_id) values(?,?);r.update(sql,type,id);
}
public void removeRecommend(int id,int type) throws SQLException {QueryRunner r new QueryRunner(DataSourceUtils.getDataSource());String sql delete from recommend where type? and goods_id?;r.update(sql,type,id);
}
最后执行成功后刷新商品列表页面同步执行后的结果显示在页面上。
添加新商品
点击商品列表页面中的“添加商品”按钮跳转至goods_add.jsp页面 % page languagejava contentTypetext/html; charsetutf-8pageEncodingutf-8%
% taglib urihttp://java.sun.com/jsp/jstl/core prefixc %
!DOCTYPE html
html
headtitle商品添加/titlemeta charsetutf-8 /link relstylesheet hrefcss/bootstrap.css /
/head
body
div classcontainer-fluidjsp:include page/admin/header.jsp/jsp:includebrbrform classform-horizontal action/admin/goods_add methodpost enctypemultipart/form-datadiv classform-grouplabel forinput_name classcol-sm-1 control-label名称/labeldiv classcol-sm-6input typetext classform-control idinput_name namename requiredrequired/div/divdiv classform-grouplabel forinput_name classcol-sm-1 control-label价格/labeldiv classcol-sm-6input typetext classform-control idinput_name nameprice /div/divdiv classform-grouplabel forinput_name classcol-sm-1 control-label介绍/labeldiv classcol-sm-6input typetext classform-control idinput_name nameintro /div/divdiv classform-grouplabel forinput_name classcol-sm-1 control-label库存/labeldiv classcol-sm-6input typetext classform-control idinput_name namestock /div/divdiv classform-grouplabel forinput_file classcol-sm-1 control-label封面图片/labeldiv classcol-sm-6input typefile namecover idinput_file requiredrequired推荐尺寸: 500 * 500/div/divdiv classform-grouplabel forinput_file classcol-sm-1 control-label详情图片1/labeldiv classcol-sm-6input typefile nameimage1 idinput_file requiredrequired推荐尺寸: 500 * 500/div/divdiv classform-grouplabel forinput_file classcol-sm-1 control-label详情图片2/labeldiv classcol-sm-6input typefile nameimage2 idinput_file requiredrequired推荐尺寸: 500 * 500/div/divdiv classform-grouplabel forselect_topic classcol-sm-1 control-label类目/labeldiv classcol-sm-6select classform-control idselect_topic nametypeidc:forEach items${typeList } vartoption value${t.id }${t.name }/option/c:forEach/select/div/divdiv classform-groupdiv classcol-sm-offset-1 col-sm-10button typesubmit classbtn btn-success提交保存/button/div/div/form
/div
/body
/html
当管理员填写商品信息并上传商品图片后点击“提交保存”按钮将所有信息提交给服务器/admin/goods_add
因此需要在servlet包中创建AdminGoodsAddServlet类
package servlet;import model.Goods;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import service.GoodsService;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.List;WebServlet(name admin_goods_add,urlPatterns /admin/goods_add)
public class AdminGoodsAddServlet extends HttpServlet {private GoodsService gService new GoodsService();/*** see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)*/protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {DiskFileItemFactory factorynew DiskFileItemFactory();ServletFileUpload upload new ServletFileUpload(factory);try {ListFileItem list upload.parseRequest(request);Goods g new Goods();for(FileItem item:list) {if(item.isFormField()) {switch(item.getFieldName()) {case name:g.setName(item.getString(utf-8));break;case price:g.setPrice(Integer.parseInt(item.getString(utf-8)));break;case intro:g.setIntro(item.getString(utf-8));break;case stock:g.setStock(Integer.parseInt(item.getString(utf-8)));break;case typeid:g.setTypeid(Integer.parseInt(item.getString(utf-8)));break;}}else {if(item.getInputStream().available()0)continue;String fileName item.getName();fileName fileName.substring(fileName.lastIndexOf(.));fileName /new Date().getTime()fileName;String path this.getServletContext().getRealPath(/picture)fileName;InputStream in item.getInputStream();FileOutputStream out new FileOutputStream(path);byte[] buffer new byte[1024];int len0;while( (lenin.read(buffer))0 ) {out.write(buffer);}in.close();out.close();item.delete();switch(item.getFieldName()) {case cover:g.setCover(/picturefileName);break;case image1:g.setImage1(/picturefileName);break;case image2:g.setImage2(/picturefileName);break;}}}gService.insert(g);request.getRequestDispatcher(/admin/goods_list).forward(request, response);} catch (FileUploadException e) {// TODO Auto-generated catch blocke.printStackTrace();}}/*** see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)*/protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubdoGet(request, response);}
}
以上代码中接收新商品的所有信息通过request请求对象获得所有表单属性并通过分支语句区分不同的表单数据对上传的图片做单独的处理使用当前的实时时间拼接图片名称作为图片的新名称并将上传的图片指定存储在项目资源的picture文件夹中接着将商品信息封装在goods对象中发送给业务逻辑层执行
//添加新商品信息
public void insert(Goods goods) {try {gDao.insert(goods);} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}
}
接着传递给数据访问层执行
public void insert(Goods g) throws SQLException {QueryRunner r new QueryRunner(DataSourceUtils.getDataSource());String sql insert into goods(name,cover,image1,image2,price,intro,stock,type_id) values(?,?,?,?,?,?,?,?);r.update(sql,g.getName(),g.getCover(),g.getImage1(),g.getImage2(),g.getPrice(),g.getIntro(),g.getStock(),g.getType().getId());
}
最后添加成功后返回商品列表页面。
修改商品信息
在商品列表页面中选择要修改的商品中的“修改”按钮向服务器发送请求地址/admin/goods_editshow并携带商品编号页码以及分类参数
因此需要在servlet包中创建AdminGoodsEditshowServelt类
package servlet;import model.Goods;
import service.GoodsService;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;WebServlet(name admin_goods_editshow,urlPatterns /admin/goods_editshow)
public class AdminGoodsEditshowServelt extends HttpServlet {private GoodsService gService new GoodsService();/*** see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)*/protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {int id Integer.parseInt(request.getParameter(id));Goods g gService.getGoodsById(id);request.setAttribute(g, g);request.getRequestDispatcher(/admin/goods_edit.jsp).forward(request, response);}/*** see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)*/protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubdoGet(request, response);}}
以上代码中接收浏览器要修改的商品编号作为查询条件将要修改的商品的信息从数据库中查询出来并显示在goods_edit.jsp修改页面上 % page languagejava contentTypetext/html; charsetutf-8pageEncodingutf-8%
% taglib urihttp://java.sun.com/jsp/jstl/core prefixc %!DOCTYPE html
html
headtitle商品编辑/titlemeta charsetutf-8 /link relstylesheet hrefcss/bootstrap.css /
/head
body
div classcontainer-fluidjsp:include page/admin/header.jsp/jsp:includebrbrform classform-horizontal action/admin/goods_edit methodpost enctypemultipart/form-datainput typehidden nameid value${g.id }/input typehidden namecover value${g.cover }/input typehidden nameimage1 value${g.image1 }/input typehidden nameimage2 value${g.image2 }/input typehidden namepageNo value${param.pageNo }/input typehidden nametype value${param.type }/div classform-grouplabel forinput_name classcol-sm-1 control-label名称/labeldiv classcol-sm-6input typetext classform-control idinput_name namename value${g.name } requiredrequired/div/divdiv classform-grouplabel forinput_name classcol-sm-1 control-label价格/labeldiv classcol-sm-6input typetext classform-control idinput_name nameprice value${g.price }/div/divdiv classform-grouplabel forinput_name classcol-sm-1 control-label介绍/labeldiv classcol-sm-6input typetext classform-control idinput_name nameintro value${g.intro }/div/divdiv classform-grouplabel forinput_name classcol-sm-1 control-label库存/labeldiv classcol-sm-6input typetext classform-control idinput_name namestock value${g.stock }/div/divdiv classform-grouplabel forinput_file classcol-sm-1 control-label封面图片/labeldiv classcol-sm-6img src${pageContext.request.contextPath }${g.cover } width100 height100/input typefile namecover idinput_file推荐尺寸: 500 * 500/div/divdiv classform-grouplabel forinput_file classcol-sm-1 control-label详情图片1/labeldiv classcol-sm-6img src${pageContext.request.contextPath }${g.image1 } width100 height100/input typefile nameimage1 idinput_file推荐尺寸: 500 * 500/div/divdiv classform-grouplabel forinput_file classcol-sm-1 control-label详情图片2/labeldiv classcol-sm-6img src${pageContext.request.contextPath }${g.image2 } width100 height100/input typefile nameimage2 idinput_file推荐尺寸: 500 * 500/div/divdiv classform-grouplabel forselect_topic classcol-sm-1 control-label类目/labeldiv classcol-sm-6select classform-control idselect_topic nametypeidc:forEach items${typeList } vartoption c:if test${t.idg.type.id }selectedselected/c:if value${t.id }${t.name }/option/c:forEach/select/div/divdiv classform-groupdiv classcol-sm-offset-1 col-sm-10button typesubmit classbtn btn-success提交修改/button/div/div/form
/div
/body
/html
当管理员在该页面上修改了商品信息后将更新后的商品信息提交给服务器地址/admin/goods_edit
因此需要在servlet包中创建AdminGoodsEditServlet类
package servlet;import model.Goods;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import service.GoodsService;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Date;
import java.util.List;WebServlet(name admin_goods_edit,urlPatterns /admin/goods_edit)
public class AdminGoodsEditServlet extends HttpServlet {private GoodsService gService new GoodsService();/*** see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)*/protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {DiskFileItemFactory factorynew DiskFileItemFactory();ServletFileUpload upload new ServletFileUpload(factory);try {ListFileItem list upload.parseRequest(request);Goods g new Goods();int pageNumber 1;int type0;for(FileItem item:list) {if(item.isFormField()) {switch(item.getFieldName()) {case id:g.setId(Integer.parseInt(item.getString(utf-8)));break;case name:g.setName(item.getString(utf-8));break;case price:g.setPrice(Float.parseFloat(item.getString(utf-8)));break;case intro:g.setIntro(item.getString(utf-8));break;case cover:g.setCover(item.getString(utf-8));break;case image1:g.setImage1(item.getString(utf-8));break;case image2:g.setImage2(item.getString(utf-8));break;case stock:g.setStock(Integer.parseInt(item.getString(utf-8)));break;case typeid:g.setTypeid(Integer.parseInt(item.getString(utf-8)));break;case pageNumber:pageNumberInteger.parseInt(item.getString(utf-8));break;case type:type Integer.parseInt(item.getString(utf-8));break;}}else {if(item.getInputStream().available()0)continue;String fileName item.getName();fileName fileName.substring(fileName.lastIndexOf(.));fileName /new Date().getTime()fileName;String path this.getServletContext().getRealPath(/picture)fileName;InputStream in item.getInputStream();FileOutputStream out new FileOutputStream(path);byte[] buffer new byte[1024];int len0;while( (lenin.read(buffer))0 ) {out.write(buffer);}in.close();out.close();item.delete();switch(item.getFieldName()) {case cover:g.setCover(/picturefileName);break;case image1:g.setImage1(/picturefileName);break;case image2:g.setImage2(/picturefileName);break;}}}gService.update(g);request.getRequestDispatcher(/admin/goods_list?pageNumberpageNumbertypetype).forward(request, response);} catch (FileUploadException e) {// TODO Auto-generated catch blocke.printStackTrace();}}/*** see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)*/protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubdoGet(request, response);}}
以上代码中所执行的代码基本和添加新商品的代码执行功能类似只是该功能不是添加至数据库而是修改已存在的商品信息。
//修改商品信息
public void update(Goods goods) {try {gDao.update(goods);} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}
}
接着将更新的商品信息同步至数据库中
public void update(Goods g) throws SQLException {QueryRunner r new QueryRunner(DataSourceUtils.getDataSource());String sql update goods set name?,cover?,image1?,image2?,price?,intro?,stock?,type_id? where id?;r.update(sql,g.getName(),g.getCover(),g.getImage1(),g.getImage2(),g.getPrice(),g.getIntro(),g.getStock(),g.getType().getId(),g.getId());
}
最后返回商品列表页面同步刷新商品信息。
删除商品
在商品列表页面中选择要删除的商品中的“删除”按钮向服务器发送请求/admin/goods_delete
因此需要在servlet包中创建AdminGoodsDeleteServlet类
package servlet;import service.GoodsService;import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;WebServlet(name admin_goods_delete,urlPatterns /admin/goods_delete)
public class AdminGoodsDeleteServlet extends HttpServlet {private GoodsService gService new GoodsService();/*** see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)*/protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {int id Integer.parseInt(request.getParameter(id));gService.delete(id);request.getRequestDispatcher(/admin/goods_list).forward(request, response);}/*** see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)*/protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {// TODO Auto-generated method stubdoGet(request, response);}
}
以上代码中接收浏览器发送的商品编号发送给业务逻辑层执行删除成功后刷新商品列表页面
//根据id删除商品信息
public void delete(int id) {try {gDao.delete(id);} catch (SQLException e) {// TODO Auto-generated catch blocke.printStackTrace();}
}
接着传递给数据访问层执行
public void delete(int id) throws SQLException {QueryRunner r new QueryRunner(DataSourceUtils.getDataSource());String sql delete from goods where id ?;r.update(sql,id);
}
最后刷新商品列表页面。
到此本项目所有功能讲解完毕该项目还有很大的功能扩充和代码优化的空间读者可以自行优化和更新该项目的功能。
