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package com.elkan.kindeditor.upload;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.Hashtable;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class UploadImageManager extends HttpServlet {
private static final long serialVersionUID = -8359652838938248988L;
// 定义允许上传的图片的扩展名
protected String[] FILETYPES = new String[] { "gif", "jpg", "jpeg", "png", "bmp" };
// 定义上传图片保存目录路径
protected String UPLOAD_PATH = "";
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html; charset=UTF-8");
PrintWriter out = response.getWriter();
String savePath = this.getInitParameter("UPLOAD_PATH");
if (savePath == null || savePath.isEmpty()) {
out.println(alertMsg("你还没设置读取上传图片保存的目录路径!"));
return;
}
// 图片保存目录路径
String rootPath = new StringBuffer(request.getSession().getServletContext().getRealPath("/")).append(savePath).toString();
// 图片保存目录URL
String rootUrl = new StringBuffer(request.getContextPath()).append("/").append(savePath).toString();
//根据path参数，设置各路径和URL
String path = request.getParameter("path") != null ? request.getParameter("path") : "";
String currentPath = rootPath + path;
String currentUrl = rootUrl + path;
String currentDirPath = path;
String moveupDirPath = "";
if (!"".equals(path)) {
String str = currentDirPath.substring(0, currentDirPath.length() - 1);
moveupDirPath = str.lastIndexOf("/") >= 0 ? str.substring(0, str.lastIndexOf("/") + 1) : "";
}
//排序形式，name or size or type
String order = request.getParameter("order") != null ? request.getParameter("order").toLowerCase() : "name";
//不允许使用..移动到上一级目录
if (path.indexOf("..") >= 0) {
out.println(alertMsg("不允许使用移动到上一级目录"));
return;
}
//最后一个字符不是/
if (!"".equals(path) && !path.endsWith("/")) {
out.println("Parameter is not valid.");
return;
}
//目录不存在或不是目录
File currentPathFile = new File(currentPath);
if(!currentPathFile.isDirectory()){
out.println("Directory does not exist.");
return;
}
//遍历目录取的文件信息
List<Hashtable<?,?>> fileList = new ArrayList<Hashtable<?,?>>();
if(currentPathFile.listFiles() != null) {
for (File file : currentPathFile.listFiles()) {
Hashtable<String, Object> hash = new Hashtable<String, Object>();
String fileName = file.getName();
if(file.isDirectory()) {
hash.put("is_dir", true);
hash.put("has_file", (file.listFiles() != null));
hash.put("filesize", 0L);
hash.put("is_photo", false);
hash.put("filetype", "");
} else if(file.isFile()){
String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
hash.put("is_dir", false);
hash.put("has_file", false);
hash.put("filesize", file.length());
hash.put("is_photo", Arrays.<String>asList(FILETYPES).contains(fileExt));
hash.put("filetype", fileExt);
}
hash.put("filename", fileName);
hash.put("datetime", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(file.lastModified()));
fileList.add(hash);
}
}
if ("size".equals(order)) {
Collections.sort(fileList, new SizeComparator());
} else if ("type".equals(order)) {
Collections.sort(fileList, new TypeComparator());
} else {
Collections.sort(fileList, new NameComparator());
}
out.println(toJSONString(currentUrl, currentDirPath, moveupDirPath, fileList));
out.flush();
out.close();
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
doGet(request, response);
}
/**
* 输出打印上传失败语句的脚本
*
* @param message 失败信息
*
* @return 页面打印的脚本语句
*/
public String alertMsg(String message) {
StringBuffer sb = new StringBuffer("<script type\"text/javascript\">");
sb.append("alert(\"").append(message).append("\");");
sb.append("</script>");
return sb.toString();
}
public String toJSONString(String currentUrl, String currentDirPath, String moveupDirPath, List<Hashtable<?, ?>> fileList){
StringBuilder sb = new StringBuilder("{\"current_url\":\"");
sb.append(currentUrl).append("\",").append("\"current_dir_path\":\"");
sb.append(currentDirPath).append("\",\"moveup_dir_path\":\"").append(moveupDirPath).append("\",");
sb.append("\"file_list\":[");
int i = 0;
sb.append("{");
for(Hashtable<?,?> he : fileList){
if(i != (fileList.size() - 1)){
sb.append("\"filename\":\"").append(he.get("filename")).append("\",");
sb.append("\"filesize\":").append(he.get("filesize")).append(",");
sb.append("\"filetype\":\"").append(he.get("filetype")).append("\",");
sb.append("\"has_file\":").append(he.get("has_file")).append(",");
sb.append("\"is_dir\":").append(he.get("is_dir")).append(",");
sb.append("\"is_photo\":").append(he.get("is_photo")).append(",");
sb.append("\"datetime\":\"").append(he.get("datetime")).append("\"");
sb.append("},{");
}else{
sb.append("\"filename\":\"").append(he.get("filename")).append("\",");
sb.append("\"filesize\":").append(he.get("filesize")).append(",");
sb.append("\"filetype\":\"").append(he.get("filetype")).append("\",");
sb.append("\"has_file\":").append(he.get("has_file")).append(",");
sb.append("\"is_dir\":").append(he.get("is_dir")).append(",");
sb.append("\"is_photo\":").append(he.get("is_photo")).append(",");
sb.append("\"datetime\":\"").append(he.get("datetime")).append("\"");
sb.append("}");
}
i++;
}
i = 0;
sb.append("],\"total_count\":").append(fileList.size()).append("}");
return sb.toString();
}
public class NameComparator implements Comparator<Object> {
public int compare(Object a, Object b) {
Hashtable<?, ?> hashA = (Hashtable<?, ?>) a;
Hashtable<?, ?> hashB = (Hashtable<?, ?>) b;
if (((Boolean) hashA.get("is_dir"))
&& !((Boolean) hashB.get("is_dir"))) {
return -1;
} else if (!((Boolean) hashA.get("is_dir"))
&& ((Boolean) hashB.get("is_dir"))) {
return 1;
} else {
return ((String) hashA.get("filename")).compareTo((String) hashB.get("filename"));
}
}
}
public class SizeComparator implements Comparator<Object> {
public int compare(Object a, Object b) {
Hashtable<?, ?> hashA = (Hashtable<?, ?>) a;
Hashtable<?, ?> hashB = (Hashtable<?, ?>) b;
if (((Boolean) hashA.get("is_dir"))
&& !((Boolean) hashB.get("is_dir"))) {
return -1;
} else if (!((Boolean) hashA.get("is_dir"))
&& ((Boolean) hashB.get("is_dir"))) {
return 1;
} else {
if (((Long) hashA.get("filesize")) > ((Long) hashB.get("filesize"))) {
return 1;
} else if (((Long) hashA.get("filesize")) < ((Long) hashB.get("filesize"))) {
return -1;
} else {
return 0;
}
}
}
}
public class TypeComparator implements Comparator<Object> {
public int compare(Object a, Object b) {
Hashtable<?, ?> hashA = (Hashtable<?, ?>) a;
Hashtable<?, ?> hashB = (Hashtable<?, ?>) b;
if (((Boolean) hashA.get("is_dir"))
&& !((Boolean) hashB.get("is_dir"))) {
return -1;
} else if (!((Boolean) hashA.get("is_dir"))
&& ((Boolean) hashB.get("is_dir"))) {
return 1;
} else {
return ((String) hashA.get("filetype")).compareTo((String) hashB.get("filetype"));
}
}
}
}
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