手把手搭建Java共享网盘的方法步骤

项目介绍

在线共享网盘采用jsp+servlet搭建项目结构实现共享网盘，项目分为管理员，普通用户和付费用户三种角色，根据不同角色控制不同权限，实现不同用户对个人文件文件，所有文件，共享文件的增删改查操作。

项目适用人群

正在做毕设的学生，或者需要项目实战练习的Java学习者

开发环境： jdk 8 intellij idea tomcat 8.5.40 mysql 5.7所用技术： jsp+servlet js+ajax layUi jdbc直连项目访问地址

http://localhost:8090

项目结构

项目截图

注册

我的网盘

我的共享

回收站

会员充值

管理员-所有文件

管理员-共享申请

关键代码:

1.初始化工作

//数据库连接初始化public class DBInfo { String url = null; String username = null; String password = null; String driverClass = null; private static DBInfo db = new DBInfo(); public static DBInfo getInstance(){ return db; } private DBInfo() { InputStream in = this.getClass().getClassLoader().getResourceAsStream('db.properties'); Properties pp = new Properties(); try { pp.load(in); url = pp.getProperty('jdbc.url'); username = pp.getProperty('jdbc.username'); password = pp.getProperty('jdbc.password'); driverClass = pp.getProperty('jdbc.driver'); Class.forName(driverClass); } catch (Exception e) { e.printStackTrace(); }finally{ try {in.close(); } catch (IOException e) {e.printStackTrace(); } } } public Connection getConnection(){ Connection conn = null; try { conn = DriverManager.getConnection(url, username, password); } catch (Exception e) { e.printStackTrace(); } return conn; }}//上传资源初始化public void init() throws ServletException { super.init(); //servlet启动时 ，读取配置文件中关于上传的信息 InputStream in = this.getClass().getClassLoader().getResourceAsStream('ini.properties'); Properties pp = new Properties(); try { pp.load(in); UPLOAD_ROOT_PATH = pp.getProperty('upload.path'); String tmpPath = pp.getProperty('tmp.path'); //配置上传临时目录 factory = new DiskFileItemFactory(1024*1024*10,new File(tmpPath)); stu = new ServletFileUpload(factory); } catch (Exception e) { e.printStackTrace(); }finally{ try { in.close(); } catch (IOException e) { e.printStackTrace(); } }}

2.资源上传

//前端JSP代码<div tabindex='-1' role='dialog' aria-labelledby='uploadFile' aria-hidden='true'> <form action='upload' method='post' enctype='multipart/form-data'> <input type='hidden' name='from' value='user'> <div class='modal-dialog'><div class='modal-content'> <div class='modal-header'> <button type='button' data-dismiss='modal' aria-hidden='true'>&times;</button> <h4 id='uploadFile'>上传文件</h4> </div> <div class='modal-body'> <input type='file' name='file' value='上传文件'> </div> <div class='modal-footer'> <button type='button' data-dismiss='modal'> 关闭 </button> <input type='submit' value='确定上传'/> </div></div> </form> </div>//后端入库处理protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException { User user = (User) request.getSession().getAttribute(Const.SESSION_USER); String from=''; try { List<FileItem> fileItemLists = stu.parseRequest(request); for(FileItem fileItem : fileItemLists){ if(fileItem.isFormField()){from = fileItem.getString(); }else{//上传文件名String fileName = fileItem.getName();String oldfilename = fileItem.getName();int index = fileName.lastIndexOf('');if(index != -1) { fileName = fileName.substring(index+1);}String root = UPLOAD_ROOT_PATH+user.getUsername();//获取文件大小long size = fileItem.getSize();String sizeString = StringUtil.computeSize(size);Timestamp upTime = new Timestamp(new Date().getTime());File file = new File(root,fileName);//解决文件同名int cnt = 1;while(file.exists()){ StringBuffer sb = new StringBuffer(fileName); sb.insert(sb.lastIndexOf('.'), '('+cnt+')'); file = new File(root,sb.toString()); cnt++;}//文件路径是否存在if(!file.getParentFile().exists()){ file.getParentFile().mkdirs();}try { fileItem.write(file); //上传成功，数据库保存记录 UserFile userFile = new UserFile(); userFile.setCreateTime(upTime); userFile.setFilename(file.getName()); userFile.setFilename(file.getName()); userFile.setFileSize(sizeString); userFile.setIsShared(0); userFile.setOwnerId(user.getId()); userFile.setPath(file.getAbsolutePath()); userFile.setOldfilename(oldfilename); userFileDao.save(userFile); response.sendRedirect(from+'?action=mydisk');} catch (Exception e) { e.printStackTrace(); response.getWriter().print('上传出错');} } } } catch (FileUploadException e) { e.printStackTrace(); response.setContentType('text/html; charset=utf8'); response.getWriter().print('上传出错!!'); }}

3.检索重复上传的资源

//这里上传在上面上传资源时候，将保存原始资源名字public List<UserFile> findRetrieveListByOwnerId(int ownerId,int isDelete){ List<UserFile> fileList = new ArrayList<UserFile>(); Connection conn = db.getConnection(); PreparedStatement ps = null; ResultSet rs = null; UserFile userFile = null; String sql='select * from file where oldfilename in ( ' + ' select a.oldfilename from (select oldfilename,count(id) counts from file GROUP BY oldfilename HAVING counts>1) a' + ' ) and ownerid=? and isDelete=?'; ps = conn.prepareStatement(sql); ps.setInt(1, ownerId); ps.setInt(2, isDelete); rs = ps.executeQuery(); while(rs.next()){ userFile = new UserFile(); userFile.setId(rs.getInt(1)); userFile.setFilename(rs.getString(2)); userFile.setPath(rs.getString(3)); userFile.setCreateTime(rs.getTimestamp(4)); userFile.setIsShared(rs.getInt(5)); userFile.setOwnerId(rs.getInt(6)); userFile.setFileSize(rs.getString(7)); userFile.setCounts(rs.getInt(8)); userFile.setSharedReason(rs.getString('SharedReason')); userFile.setSharedTime(rs.getString('SharedTime')); fileList.add(userFile); } return fileList;}

4.平台会员充值

//前端jsp代码<body> <div id='wrapper'> <%@include file='common/nav.jsp' %> <div id='page-wrapper'> <div class=''> <div class='col-md-12'> <h1 class='margin-bottom-15'>以下是微信付款码，扫码即可支付</h1> <div class='form-group'><div class='col-md-12'> <div class='control-wrapper'> <div id='div1'> <input type='submit' value='扫码付款' class='btn btn-success'> </div> <div style='display: none;'> <input type='submit' value='恭喜您，完成扫码支付！'class='btn btn-warning'> </div> </div> <div class='text-center'> <font color='green'>${msgSuccess }</font> <font color='red'>${msgFail }</font> </div></div> </div> <form role='form' action='user' method='post'><input type='hidden' name='action' value='editSubmit'><div class='form-group'> <img src='https://www.haobala.com/bcjs/static/image/pay.png' alt='平台会员充值码' style='width: 81%; padding-left: 24%;'></div> </form> </div> </div> </div> </div></body>//js实现,采用定时跳转模拟真实用户支付流程，后续进行改动用户会员状态var test1 = setTimeout(function(){ $('#div1').css('display','none'); $('#div2').css('display','block'); layer.msg(’恭喜您，完成扫码支付！’, {time: 4000, icon:6},function () { window.location.href='https://www.haobala.com/bcjs/user?action=doTopUp'; }); clearTimeout(test1);},5000);//后端代码public void doTopUp(User user) { Connection conn = db.getConnection(); PreparedStatement ps = null; ResultSet rs = null; try { //members=1为会员状态 ps = conn.prepareStatement('update user set members = 1 where id = ?'); ps.setInt(1, user.getId()); ps.execute(); } catch (SQLException e) { e.printStackTrace(); } finally { try { if (conn != null)conn.close(); if (ps != null)ps.close(); if (rs != null)rs.close(); } catch (SQLException e) { e.printStackTrace(); } }}项目后续

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