【Java】手把手搭建Java共享网盘

• Z时代
• 2024-01-10
• 分类：技术分享

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项目介绍

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：

1. jdk 8
2. intellij idea
3. tomcat 8.5.40
4. mysql 5.7

所用技术：

1. jsp+servlet
2. js+ajax
3. layUi
4. 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 class="modal fade" id="uploadModal" 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" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
<h4 class="modal-title" 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" class="btn btn-default" data-dismiss="modal">
关闭
</button>
<input type="submit" class="btn btn-primary" 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 class="text-center" id="div1">
<input type="submit" value="扫码付款"  class="btn btn-success">
</div>
<div class="text-center" id="div2">
<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 class="form-horizontal templatemo-container templatemo-login-form-1 margin-bottom-30" role="form" action="user" method="post">
<input type="hidden" name="action" value="editSubmit">
<div class="form-group">
<img alt="平台会员充值码">
</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://segmentfault.com/a/1190000038705441/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

其他ssh，ssm，springboot版本后续迭代更新，持续关注

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