kindeditor 上传下载文件

package cn.tele.servlet; import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.Arrays;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Random; 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.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.json.simple.JSONObject; public class UploadServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset = utf-8");
//文件保存目录路径
String savePath = request.getSession().getServletContext().getRealPath("/") + "WEB-INF/attached/";
PrintWriter out = response.getWriter();
//文件保存目录URL
String saveUrl = request.getContextPath() + "/WEB-INF/attached/"; //定义允许上传的文件扩展名
HashMap<String, String> extMap = new HashMap<String, String>();
extMap.put("image", "gif,jpg,jpeg,png,bmp");
extMap.put("flash", "swf,flv");
extMap.put("media", "swf,flv,mp3,wav,wma,wmv,mid,avi,mpg,asf,rm,rmvb");
extMap.put("file", "doc,docx,xls,xlsx,ppt,htm,html,txt,zip,rar,gz,bz2"); //最大文件大小
long maxSize = 1000000000; response.setContentType("text/html; charset=UTF-8"); if(!ServletFileUpload.isMultipartContent(request)){
out.println(getError("请选择文件。"));
return;
}
//检查目录
File uploadDir = new File(savePath);
if(!uploadDir.isDirectory()){
out.println(getError("上传目录不存在。"));
return;
}
//检查目录写权限
if(!uploadDir.canWrite()){
out.println(getError("上传目录没有写权限。"));
return;
} //单独使用组件时要传递dirName,参考demo3.jsp
String dirName = request.getParameter("dir");
if (dirName == null) {
// dirName = "image";
}
System.out.println("dirName--------" + dirName);
if(!extMap.containsKey(dirName)){
out.println(getError("目录名不正确。"));
return;
}
//创建文件夹
// savePath += dirName + "/";
// saveUrl += dirName + "/";
File saveDirFile = new File(savePath);
if (!saveDirFile.exists()) {
saveDirFile.mkdirs();
}
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
String ymd = sdf.format(new Date());
// savePath += ymd + "/";
// saveUrl += ymd + "/";
File dirFile = new File(savePath);
if (!dirFile.exists()) {
dirFile.mkdirs();
} FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setHeaderEncoding("UTF-8");
List items;
try {
items = upload.parseRequest(request);
Iterator itr = items.iterator();
while (itr.hasNext()) {
FileItem item = (FileItem) itr.next();
String fileName = item.getName();
String oldFileName = fileName;
long fileSize = item.getSize();
if (!item.isFormField()) {
//检查文件大小
if(item.getSize() > maxSize){
out.println(getError("上传文件大小超过限制。"));
return;
}
//检查扩展名
String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
if(!Arrays.<String>asList(extMap.get(dirName).split(",")).contains(fileExt)){
out.println(getError("上传文件扩展名是不允许的扩展名。\n只允许" + extMap.get(dirName) + "格式。"));
return;
} SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
String newFileName = df.format(new Date()) + new Random().nextInt(1000) + "." + fileExt;
File uploadedFile = new File(savePath, newFileName);
item.write(uploadedFile); JSONObject obj = new JSONObject();
obj.put("error", 0);
// obj.put("url", saveUrl + newFileName);
obj.put("url",oldFileName);//回显原文件名
out.println(obj.toJSONString());
}
}
}catch (FileUploadException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset = utf-8");
doGet(request, response);
} private String getError(String message) {
JSONObject obj = new JSONObject();
obj.put("error", 1);
obj.put("message", message);
return obj.toJSONString();
} }

package cn.tele.servlet; import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.net.URL;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map; import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse; /**
* 显示可供下载的文件列表
* @author Administrator
*
*/
public class ListFileServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset = utf-8");
//使用kindeditor上传的文件均被重命名为:yyyyMMddHHssmm+三位随机数的形式,所以文件名不需要编码转换
String dirPath = this.getServletContext().getRealPath("/WEB-INF/attached/");
Map<String,String> map = new HashMap<String, String>();
File dir = new File(dirPath);
if(dir.isDirectory()) {
File[] files = dir.listFiles();
for(File file : files) {
map.put(file.getName(),file.getAbsolutePath());
}
}
request.setAttribute("map",map);
request.getRequestDispatcher("/WEB-INF/jsp/listFile.jsp").forward(request, response);
} public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
} }