相册管理系统(Java表单+xml数据库存储)-eolink官网

相册管理系统(Java表单+xml数据库存储)

功能文件的上传，下载和管理

技术：1.用xml当做数据库存储信息（dom4j，xpath)

2.java表单的文件上传和下载

3.文件目录的打散（ Hash目录是一种优化文件存储性能的方法）

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

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

先写index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

上传相册

浏览相册

upload.jsp是下载页面放在jsps目录下

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

method="post" enctype="multipart/form-data">

文件:

说明:

photos.xml放在src目录下

在写值对象PhotoModel

package cn.hncu.demain;

public class PhotoModel {

private String id;

private String TaTYLSXdyrealName;

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 + "]";

}

写工具类两个：

MyUtil（日期格式化，目录打散代码，随机id代码)

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的相关操作，获取document对象，保存操作)

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();

// 学习一下服务器下的资源路径加载方式(因为我们的资源已经从MyEclipse中发布到Tomcat服务器中了，所以跟原来纯Java项目不一样了)

// 利用当前类找到它的类加载器，然后通过该类加载器再去获得资源路径

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;

}

从底层写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;

}

//浏览

public List getAll(){

Document dom=Dom4jFactory.getDom();

List list=new ArrayList();

Element root=dom.getRootElement();

Iterator it=root.elementIterator();

while(it.hasNext()){

PhotoModel photo=new PhotoModel();

Element e=it.next();

photo.setId(e.attributeValue("id"));

photo.setDateTihttp://me(e.attributeValue("dateTime"));

photo.setDir(e.attributeValue("dir"));

photo.setExt(e.attributeValue("ext"));

photo.setIpTaTYLSXdy(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 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);

}

最后写四个servlet

UploadServlet 上传Servlet代码

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(" ");

out.println("");

out.println("

out.println("不支持get方式上传!");

out.println(" ");

out.println("");

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");//用于设置文件名的编码，相当于：request.setCharacterEncoding("utf-8");

FileItem fi=null;

try {

List list=upload.parseRequest(request);

PhotoModel photo = new PhotoModel();//数据封装---需要7个属性

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("没有选择文件!");

return;

}

if(realName.indexOf("\\")!=-1){

realName=realName.substring(realName.lastIndexOf("\\")+1);

}

photo.setRealName(realName);//真实文件名

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

}

//把相片信息存储到数据库

PhotoDao dao=new PhotoDao();

boo=dao.add(photo);

//如果上面的相片信息保存成功，那么才开始接收图片文件，把它保存到服务器硬盘

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("上传成功!浏览相册");

}else{

out.print("上传失败!");

}

} catch (FileUploadException e) {

throw new RuntimeException("上传失败！", e);

}finally{

if(fi!=null){

fi.delete();

}

out.flush();

out.close();

}

ShowServlet 浏览相册的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(" ");

out.println("");

out.println("

String table="

;

out.print(table);

PhotoDao dao=new PhotoDao();

List list=dao.getAll();

for(PhotoModel p:list){

out.print("

out.println("

//输出图片

String path=request.getContextPath()+"/photos/"+p.getDir()+"/"+p.getId()+p.getExt();

out.println("

String op="删除 ";

out.println("

op+="下载";

out.println("

out.print("

}

out.println("

out.println(" ");

out.println("");

out.flush();

out.close();

}

DownServlet 下载的服务器代码

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("该文件已经被删除!");

}

Delservlet 删除操作的服务器

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("你无权进行删除！");

return;

}

//※※※※以下部分课后补敲的!!!!

//1删除数据库中的信息

PhotoDao dao=new PhotoDao();

boolean boo=dao.del(id);

//2把服务器硬盘中的文件删除

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("相片删除成功!浏览相册");

}else{

out.println("相片删除失败!");

}

}else{

response.setContentType("text/html;charset=utf-8");

response.getWriter().println("该文件不存在!");

}

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