相簿管理系統(Java表單+xml資料庫儲存)

相簿管理系統(Java表單+xml資料庫儲存)_java

最後更新：2017-01-19 來源：互聯網

上載者：User

創建阿里雲帳戶，並獲得超過 40 款產品的免費試用版；而企業帳戶則可以享有總值 $1200 的免費試用版。立即註冊！

功能檔案的上傳，下載和管理
技術：1.用xml當做資料庫儲存資訊（dom4j，xpath)
2.Java表單的檔案上傳和下載
3.檔案目錄的打散（ Hash目錄是一種最佳化檔案儲存體效能的方法）

需要的jar包：
commons-fileupload-1.2.2.jar、commons-io-2.1.jar、dom4j-1.6.1.jar和jaxen-1.1-beta-6.jar

--------------------------------------------------------------------------------

先寫index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> <title>相簿管理系統</title> </head> <body>  <h1>我的小相簿</h1>  <a href="jsps/upload.jsp">上傳相簿</a>  <a href="servlets/ShowServlet">瀏覽相簿</a> </body></html>

upload.jsp是下載頁面放在jsps目錄下

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head> </head> <body> <h1>相處上傳</h1> <form action="<%=request.getContextPath()%>/servlets/UploadServlet"   method="post" enctype="multipart/form-data">    檔案:<input type="file" name="file1"/><br/>    說明:<input type="text" name="desc" /><br/>  <input type="submit" value="上傳" /> </form> </body></html>

photos.xml放在src目錄下

<?xml version="1.0" encoding="UTF-8"?><photos></photos>

在寫值對象PhotoModel

package cn.hncu.demain;public class PhotoModel { private String id; private String realName; private String ext; private String dir; private String dateTime; private String ip; private String desc; public String getId() {  return id; } public void setId(String id) {  this.id = id; } public String getRealName() {  return realName; } public void setRealName(String realName) {  this.realName = realName; } public String getExt() {  return ext; } public void setExt(String ext) {  this.ext = ext; } public String getDir() {  return dir; } public void setDir(String dir) {  this.dir = dir; } public String getDateTime() {  return dateTime; } public void setDateTime(String dateTime) {  this.dateTime = dateTime; } public String getIp() {  return ip; } public void setIp(String ip) {  this.ip = ip; } public String getDesc() {  return desc; } public void setDesc(String desc) {  this.desc = desc; } @Override public String toString() {  return "PhotoModel [id=" + id + ", realName=" + realName + ", ext="    + ext + ", dir=" + dir + ", dateTime=" + dateTime + ", ip="    + ip + ", desc=" + desc + "]"; }}

寫工具類兩個：
MyUtil（日期格式化，目錄打散代碼，隨機id代碼)

package cn.hncu.utils;import java.text.SimpleDateFormat;import java.util.Date;import java.util.UUID;public class MyUtils { private MyUtils() { } private static SimpleDateFormat format=new SimpleDateFormat("yyyy年MM月dd日 hh:mm:ss"); public static String getCurrentDateTime(){  return format.format(new Date()); } public static String getUUid(){  UUID uuid=UUID.randomUUID();  String id=uuid.toString().replaceAll("-", "");  return id; } public static String getDir(String uuid){  String dir1=Integer.toHexString(uuid.hashCode() & 0xf);  String dir2=Integer.toHexString((uuid.hashCode() & 0xf0)>>4);  return dir1+"/"+dir2; }}

Dom4jFactory(dom4j的相關操作，擷取document對象，儲存操作)

package cn.hncu.utils;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.UnsupportedEncodingException;import org.dom4j.Document;import org.dom4j.DocumentException;import org.dom4j.io.OutputFormat;import org.dom4j.io.SAXReader;import org.dom4j.io.XMLWriter;public class Dom4jFactory { private static Document dom = null; private static String path; static {  try {   SAXReader sax = new SAXReader();   // 學習一下伺服器下的資源路徑載入方式(因為我們的資源已經從MyEclipse中發布到Tomcat伺服器中了，所以跟原來純Java項目不一樣了)   // 利用當前類找到它的類載入器，然後通過該類載入器再去獲得資源路徑   path = Dom4jFactory.class.getClassLoader().getResource("photos.xml")     .getPath();   dom = sax.read(new FileInputStream(path));  } catch (Exception e) {   throw new RuntimeException(e.getMessage(), e);  } } public static Document getDom(){  return dom; } public static boolean save(){  try {   OutputFormat format=new OutputFormat();   format.setEncoding("utf-8");   XMLWriter w = new XMLWriter( new FileOutputStream(new File(path)),format);   w.write(dom);   w.close();   return true;  } catch (Exception e) {   return false;  } }}

從底層寫PhotoDao

package cn.hncu.dao;import java.util.ArrayList;import java.util.Iterator;import java.util.List;import org.dom4j.Document;import org.dom4j.Element;import cn.hncu.demain.PhotoModel;import cn.hncu.utils.Dom4jFactory;public class PhotoDao { //添加 public boolean add(PhotoModel photo){  Document dom=Dom4jFactory.getDom();  Element root=dom.getRootElement();  Element ePhoto=root.addElement("photo");  ePhoto.addAttribute("id", photo.getId());  ePhoto.addAttribute("realName", photo.getRealName());  ePhoto.addAttribute("dir", photo.getDir());  ePhoto.addAttribute("ip", photo.getIp());  ePhoto.addAttribute("dateTime", photo.getDateTime());  ePhoto.addAttribute("ext", photo.getExt());  ePhoto.addElement("desc").setText(photo.getDesc());  boolean boo=Dom4jFactory.save();  return boo; } //瀏覽 public List<PhotoModel> getAll(){  Document dom=Dom4jFactory.getDom();  List<PhotoModel> list=new ArrayList<PhotoModel>();  Element root=dom.getRootElement();  Iterator<Element> it=root.elementIterator();  while(it.hasNext()){   PhotoModel photo=new PhotoModel();   Element e=it.next();   photo.setId(e.attributeValue("id"));   photo.setDateTime(e.attributeValue("dateTime"));   photo.setDir(e.attributeValue("dir"));   photo.setExt(e.attributeValue("ext"));   photo.setIp(e.attributeValue("ip"));   photo.setRealName(e.attributeValue("realName"));   photo.setDesc(e.elementText("desc"));   list.add(photo);  }  return list; } public PhotoModel getSingleById(String id) {  Document dom=Dom4jFactory.getDom();  List<PhotoModel> list=getAll();  for(PhotoModel photo:list){   if(photo.getId().equals(id)){    return photo;   }  }  return null; } public boolean del(String id) {  Document dom=Dom4jFactory.getDom();  Element e=(Element) dom.selectSingleNode("//photo[@id='"+id.trim()+"']");  return e.getParent().remove(e); }}

最後寫四個servlet
UploadServlet 上傳Servlet代碼

package cn.hncu.servlets;import java.io.File;import java.io.IOException;import java.io.InputStream;import java.io.PrintWriter;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;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 org.apache.commons.io.FileUtils;import cn.hncu.dao.PhotoDao;import cn.hncu.demain.PhotoModel;import cn.hncu.utils.MyUtils;public class UploadServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response)   throws ServletException, IOException {  response.setContentType("text/html;charset=utf-8");  PrintWriter out = response.getWriter();  out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");  out.println("<HTML>");  out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");  out.println(" <BODY>");  out.println("不支援get方式上傳!");  out.println(" </BODY>");  out.println("</HTML>");  out.flush();  out.close(); } public void doPost(HttpServletRequest request, HttpServletResponse response)   throws ServletException, IOException {  response.setContentType("text/html;charset=utf-8");  PrintWriter out = response.getWriter();  String path=request.getServletContext().getRealPath("/photos");  DiskFileItemFactory factory=new DiskFileItemFactory();  factory.setRepository(new File("g:/a"));  ServletFileUpload upload = new ServletFileUpload(factory);  upload.setSizeMax(1024*1024*10);//最大10M  upload.setHeaderEncoding("utf-8");//用於設定檔案名稱的編碼，相當於：request.setCharacterEncoding("utf-8");   FileItem fi=null;   try {   List<FileItem> list=upload.parseRequest(request);   PhotoModel photo = new PhotoModel();//資料封裝---需要7個屬性   boolean boo=false;   InputStream in = null;   for(FileItem fi2:list){    fi=fi2;    if(fi.isFormField()){     String desc=fi.getString("utf-8");     photo.setDesc(desc);//desc    }else{     in=fi.getInputStream();     String realName=fi.getName();     if(realName==null || realName.trim().equals("")){      out.print("沒有選擇檔案!");      return;     }     if(realName.indexOf("\\")!=-1){      realName=realName.substring(realName.lastIndexOf("\\")+1);     }     photo.setRealName(realName);//真實檔案名稱     String ext=realName.substring(realName.lastIndexOf("."));     photo.setExt(ext);//3     photo.setDateTime(MyUtils.getCurrentDateTime());//4     photo.setId(MyUtils.getUUid());//5     photo.setDir(MyUtils.getDir(photo.getId()));//6     photo.setIp(request.getRemoteAddr());//7    }   }   //把相片資訊儲存到資料庫   PhotoDao dao=new PhotoDao();   boo=dao.add(photo);   //如果上面的相片資訊儲存成功，那麼才開始接收圖片檔案，把它儲存到伺服器硬碟   if(boo){    System.out.println(dao);    path=path+"/"+photo.getDir();    File dir=new File(path);    if(!dir.exists()){     dir.mkdirs();    }    String fileName=path+"/"+photo.getId()+photo.getExt();    FileUtils.copyInputStreamToFile(in, new File(fileName));    String strPath = request.getContextPath()+"/servlets/ShowServlet";    out.print("上傳成功!<a href='"+strPath+"'>瀏覽相簿</a>");   }else{    out.print("上傳失敗!");   }   } catch (FileUploadException e) {   throw new RuntimeException("上傳失敗！", e);  }finally{   if(fi!=null){    fi.delete();   }  }  out.flush();  out.close(); }}

ShowServlet 瀏覽相簿的Servlet端

package cn.hncu.servlets;import java.io.IOException;import java.io.PrintWriter;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import cn.hncu.dao.PhotoDao;import cn.hncu.demain.PhotoModel;public class ShowServlet extends HttpServlet {  IOException if an error occurred public void doGet(HttpServletRequest request, HttpServletResponse response)   throws ServletException, IOException {   doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response)   throws ServletException, IOException {  response.setContentType("text/html;charset=utf-8");  request.setCharacterEncoding("utf-8");  PrintWriter out = response.getWriter();  out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");  out.println("<HTML>");  out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");  out.println(" <BODY>");  String table="<table border='1' width='100%'>"+     "<tr><th>檔案名稱</th><th>上傳ip</th><th>上傳時間</th><th>圖片</th><th>說明</th><th>操作</th></tr>"     ;  out.print(table);  PhotoDao dao=new PhotoDao();  List<PhotoModel> list=dao.getAll();  for(PhotoModel p:list){   out.print("<tr>");   out.println("<td>"+p.getRealName()+"</td>");   out.println("<td>"+p.getIp()+"</td>");   out.println("<td>"+p.getDateTime()+"</td>");   //輸出圖片   String path=request.getContextPath()+"/photos/"+p.getDir()+"/"+p.getId()+p.getExt();   out.println("<td><a href='"+path+"'><img src='"+path+"' width='200' height='200'></img></a></td>");   String op="<a href='"+request.getContextPath()+"/servlets/DelServlet?id="+p.getId()+"'>刪除</a> ";   out.println("<td>"+p.getDesc()+"</td>");   op+="<a href='"+request.getContextPath()+"/servlets/DownServlet?id="+p.getId()+"'>下載</a>";   out.println("<td>"+op+"</td>");   out.print("</tr>");  }  out.println("</table>");  out.println(" </BODY>");  out.println("</HTML>");  out.flush();  out.close(); }}

DownServlet 下載的伺服器代碼

package cn.hncu.servlets;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.io.PrintWriter;import java.net.URLEncoder;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import cn.hncu.dao.PhotoDao;import cn.hncu.demain.PhotoModel;public class DownServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response)   throws ServletException, IOException {   doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response)   throws ServletException, IOException {  String id=request.getParameter("id");  response.setContentType("application/force-download");  PhotoModel p=new PhotoDao().getSingleById(id);  if(p!=null){   String realName=p.getRealName();   realName=new String(realName.getBytes("iso8859-1"),"utf-8");   response.setHeader("content-Disposition", "attachment;filename=\""+realName+"\"");   String relpath=getServletContext().getRealPath("/photos/"+p.getDir()+"/"+p.getId()+p.getExt());   InputStream in=new FileInputStream(relpath);   OutputStream out=response.getOutputStream();   System.out.println(relpath);   byte buf[]=new byte[1024];   int len=0;   while ((len=in.read(buf))!=-1){    out.write(buf,0,len);   }   out.close();  }else{   response.setContentType("text/html;charset=utf-8");   response.getWriter().println("該檔案已經被刪除!");  } }}

Delservlet 刪除操作的伺服器

package cn.hncu.servlets;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.io.PrintWriter;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import cn.hncu.dao.PhotoDao;import cn.hncu.demain.PhotoModel;public class DelServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response)   throws ServletException, IOException {   doPost(request, response); } public void doPost(HttpServletRequest request, HttpServletResponse response)   throws ServletException, IOException {  request.setCharacterEncoding("utf-8");  response.setContentType("text/html;charset=utf-8");  PrintWriter out=response.getWriter();  String id=request.getParameter("id");  PhotoModel p=new PhotoDao().getSingleById(id);  if(p!=null){   if(!p.getIp().equals(request.getRemoteAddr())){    out.println("你無權進行刪除！");    return;   }   //※※※※以下部分課後補敲的!!!!   //1刪除資料庫中的資訊   PhotoDao dao=new PhotoDao();   boolean boo=dao.del(id);   //2把伺服器硬碟中的檔案刪除   if(boo){   String fileName="photos/"+p.getDir()+"/"+p.getId()+p.getExt();    String pathFileName = getServletContext().getRealPath(fileName);    File f=new File(pathFileName);    if(f.exists()){     f.delete();    }    String strPath = request.getContextPath()+"/servlets/ShowServlet";    out.println("相片刪除成功!<a href='"+strPath+"'>瀏覽相簿</a>");   }else{    out.println("相片刪除失敗!");   }  }else{   response.setContentType("text/html;charset=utf-8");   response.getWriter().println("該檔案不存在!");  } }}

以上就是本文的全部內容，希望對大家的學習有所協助，也希望大家多多支援雲棲社區。

本文章原先以中文撰寫並發佈於 aliyun.com，亦設英文版本，僅作資訊用途。本網站不對文章的準確性，完整性或可靠性或其任何翻譯作出任何明示或暗示的陳述或保證。如對該文章有任何疑慮或投訴，請傳送電郵至 info-contact@alibabacloud.com 並提供相關疑慮或投訴的詳細說明。職員會於 5 個工作天內與您聯絡，一經驗證之後，即會刪除該侵權內容。

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

Get Started for Free

Sales Support

1 on 1 presale consultation

Chat Contact Sales
After-Sales Support

24/7 Technical Support 6 Free Tickets per Quarter Faster Response

Open a Ticket
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.

Learn More

相簿管理系統(Java表單+xml資料庫儲存)_java

聯繫我們

A Free Trial That Lets You Build Big!

Sales Support

After-Sales Support