Java 实战项目锤炼之仿天猫网上商城的实现流程

一、项目简述

功能：

前台：

* 用户模块

* 分类模块

* 商品模块

* 购物车模块

* 订单模块

后台：

* 管理员模块

* 分类管理模块

* 商品管理模块

* 订单模块

二、项目运行

环境配置： jdk1.8 + tomcat8.5 + mysql + eclispe (intellij idea,eclispe,myeclispe,sts 都支持)

项目技术： jsp + c3p0+ servlert + html+ css + javascript + jquery + ajax + fileupload等等。

基础信息操作代码:

基础信息操作:
 
public abstract class basebackservlet extends httpservlet {
 
    /* 添加 */
    public abstract string add(httpservletrequest request, httpservletresponse response, page page);
    /* 删除 */
    public abstract string delete(httpservletrequest request, httpservletresponse response, page page);
    /* 更新 */
    public abstract string update(httpservletrequest request, httpservletresponse response, page page);
    /* 修改 */
    public abstract string edit(httpservletrequest request, httpservletresponse response, page page);
    /* 显示 */
    public abstract string list(httpservletrequest request, httpservletresponse response, page page);
 
    protected categorydao categorydao = new categorydao();
    protected orderdao orderdao = new orderdao();
    protected orderitemdao orderitemdao = new orderitemdao();
    protected productdao productdao = new productdao();
    protected productimagedao productimagedao = new productimagedao();
    protected propertydao propertydao = new propertydao();
    protected propertyvaluedao propertyvaluedao = new propertyvaluedao();
    protected reviewdao reviewdao = new reviewdao();
    protected userdao userdao = new userdao();
 
    @override
    protected void service(httpservletrequest req, httpservletresponse resp) throws servletexception, ioexception {
        try{
            /* 获取分页信息 */
            int start = 0;
            int count = 5;
            try{
                start = integer.parseint(req.getparameter("page.start"));
                count = integer.parseint(req.getparameter("page.count"));
            } catch(exception e) {
 
            }
 
            page page = new page(start, count);
 
            /* 借助反射，调用对应的方法 */
            string method = (string)req.getattribute("method");
            method m = this.getclass().getmethod(method, httpservletrequest.class, httpservletresponse.class, page.class);
            string redirect = m.invoke(this, req, resp, page).tostring();
 
            /* 根据方法的返回值，进行相应的客户端、服务端跳转，或仅输出字符串 */
            if(redirect.startswith("@")){
                resp.sendredirect(redirect.substring(1));
            } else if(redirect.startswith("%")){
                resp.getwriter().print(redirect.substring(1));
            } else {
                req.getrequestdispatcher(redirect).forward(req, resp);
            }
        } catch (nosuchmethodexception e) {
            e.printstacktrace();
        } catch (illegalaccessexception e) {
            e.printstacktrace();
        } catch (invocationtargetexception e) {
            e.printstacktrace();
        }
    }
 
    public inputstream parseupload(httpservletrequest request, map<string, string> params){
        inputstream is = null;
        try{
            diskfileitemfactory factory = new diskfileitemfactory();
            servletfileupload upload = new servletfileupload(factory);
            //设置上传的文件大小限制为10m
            factory.setsizethreshold(1024 * 1024);
 
            list items = upload.parserequest(request);
            iterator iter = items.iterator();
 
            while(iter.hasnext()){
                fileitem item = (fileitem) iter.next();
                if(!item.isformfield()){
                    //获取上传文件的输入流
                    is = item.getinputstream();
                } else {
                    string paramname = item.getfieldname();
                    string paramvalue = item.getstring();
                    paramvalue = new string(paramvalue.getbytes("iso-8859-1"), "utf-8");
                    params.put(paramname, paramvalue);
                }
            }
 
        } catch (fileuploadexception e) {
            e.printstacktrace();
        } catch (unsupportedencodingexception e) {
            e.printstacktrace();
        } catch (ioexception e) {
            e.printstacktrace();
        }
        return is;
    }
 
}

用户信息操作代码:

用户信息操作:
 
public class userservlet extends basebackservlet {
 
    @override
    public string add(httpservletrequest request, httpservletresponse response, page page) {
        system.out.println("调用了 userservlet add方法");
        return null;
    }
 
    @override
    public string delete(httpservletrequest request, httpservletresponse response, page page) {
        system.out.println("调用了 userservlet delete方法");
 
        int id = integer.parseint(request.getparameter("id"));
        userdao.delete(id);
        return "@admin_user_list";
    }
 
    @override
    public string update(httpservletrequest request, httpservletresponse response, page page) {
        system.out.println("调用了 userservlet update方法");
 
        map<string, string> params = new hashmap<>();
        inputstream is = super.parseupload(request, params);
        system.out.println(params);
 
        int id = integer.parseint(params.get("id"));
        string password = params.get("password");
 
        user user = userdao.get(id);
        user.setpassword(password);
 
        userdao.update(user);
 
        return "@admin_user_list";
    }
 
    @override
    public string edit(httpservletrequest request, httpservletresponse response, page page) {
        system.out.println("调用了 userservlet edit方法");
 
        int id = integer.parseint(request.getparameter("id"));
        user u = userdao.get(id);
 
        request.setattribute("u", u);
 
        return "admin/edituser.jsp";
    }
 
    @override
    public string list(httpservletrequest request, httpservletresponse response, page page) {
        system.out.println("调用了 userservlet list方法");
 
        list<user> us = userdao.list(page.getstart(), page.getcount());
        int total = userdao.gettotal();
        page.settotal(total);
 
        request.setattribute("us", us);
        request.setattribute("page", page);
 
        return "admin/listuser.jsp";
    }
}

以上就是java 实战项目锤炼之仿天猫网上商城的实现流程的详细内容，更多关于java 天猫商城的资料请关注其它相关文章！