package cn.com.seegoo.xm.front.servlets;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadBase.SizeLimitExceededException;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import cn.com.seegoo.servletrest.servlets.BaseServlet;
public class PhotoUpServlet extends BaseServlet{
final long MAX_SIZE = 10 * 1024 * 1024;// 璁劇疆涓婁紶鏂囦歡鏈澶т負 10M
// 鍏佽涓婁紶鐨勬枃浠舵牸寮忕殑鍒楄〃
final String[] allowtype = new String[] {"jpg","jpeg","gif","txt","doc","docx","mp3","wma","m4a","xls"};
public PhotoUpServlet() {
super();
}
public void destroy() {
super.destroy();
}
@Override
protected void service(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
// 璁劇疆瀛楃緙栫爜涓篣TF-8, 榪欐牱鏀寔姹夊瓧鏄劇ず
response.setCharacterEncoding("UTF-8");
// 瀹炰緥鍖栦竴涓‖鐩樻枃浠跺伐鍘?鐢ㄦ潵閰嶇疆涓婁紶緇勪歡ServletFileUpload
DiskFileItemFactory dfif = new DiskFileItemFactory();
dfif.setSizeThreshold(4096);// 璁劇疆涓婁紶鏂囦歡鏃剁敤浜庝復鏃跺瓨鏀炬枃浠剁殑鍐呭瓨澶у皬,榪欓噷鏄?K.澶氫簬鐨勯儴鍒嗗皢涓存椂瀛樺湪紜洏
dfif.setRepository(new File(request.getRealPath("/")
+ "upload"));// 璁劇疆瀛樻斁涓存椂鏂囦歡鐨勭洰褰?web鏍圭洰褰曚笅鐨剈ploadtemp鐩綍
// 鐢ㄤ互涓婂伐鍘傚疄渚嬪寲涓婁紶緇勪歡
ServletFileUpload sfu = new ServletFileUpload(dfif);
// 璁劇疆鏈澶т笂浼犲昂瀵?br /> sfu.setSizeMax(MAX_SIZE);
PrintWriter out = response.getWriter();
// 浠巖equest寰楀埌 鎵鏈?涓婁紶鍩熺殑鍒楄〃
List fileList = null;
try {
fileList = sfu.parseRequest(request);
} catch (FileUploadException e) {// 澶勭悊鏂囦歡灝哄榪囧ぇ寮傚父
if (e instanceof SizeLimitExceededException) {
out.println("{message:'鏂囦歡灝哄瓚呰繃瑙勫畾澶у皬:"+MAX_SIZE+"瀛楄妭'}");
return;
}
e.printStackTrace();
}
// 娌℃湁鏂囦歡涓婁紶
if (fileList == null || fileList.size() == 0) {
out.println("{message:'璇烽夋嫨涓婁紶鏂囦歡'}");
return;
}
// 寰楀埌鎵鏈変笂浼犵殑鏂囦歡
Iterator fileItr = fileList.iterator();
// 寰幆澶勭悊鎵鏈夋枃浠?br /> while (fileItr.hasNext()) {
FileItem fileItem = null;
String path = null;
long size = 0;
// 寰楀埌褰撳墠鏂囦歡
fileItem = (FileItem) fileItr.next();
// 蹇界暐綆鍗昮orm瀛楁鑰屼笉鏄笂浼犲煙鐨勬枃浠跺煙(<input type="text" />絳?
if (fileItem == null || fileItem.isFormField()) {
continue;
}
// 寰楀埌鏂囦歡鐨勫畬鏁磋礬寰?br /> path = fileItem.getName();
// 寰楀埌鏂囦歡鐨勫ぇ灝?br /> size = fileItem.getSize();
if ("".equals(path) || size == 0) {
out.println("{message:'璇烽夋嫨涓婁紶鏂囦歡'}");
return;
}
// 寰楀埌鍘婚櫎璺緞鐨勬枃浠跺悕
String t_name = path.substring(path.lastIndexOf("\\") + 1);
// 寰楀埌鏂囦歡鐨勬墿灞曞悕(鏃犳墿灞曞悕鏃跺皢寰楀埌鍏ㄥ悕)
String t_ext = t_name.substring(t_name.lastIndexOf(".") + 1);
// 鎷掔粷鎺ュ彈瑙勫畾鏂囦歡鏍煎紡涔嬪鐨勬枃浠剁被鍨?br /> int allowFlag = 0;
int allowedExtCount = allowtype.length;
for (; allowFlag < allowedExtCount; allowFlag++) {
if (allowtype[allowFlag].equals(t_ext))
break;
}
if (allowFlag == allowedExtCount) {
String message = "";
for (allowFlag = 0; allowFlag < allowedExtCount; allowFlag++){
message+="*." + allowtype[allowFlag]
+ " ";
}
out.println("{message:'璇蜂笂浼犱互涓嬬被鍨嬬殑鏂囦歡"+message+"'}");
return;
}
long now = System.currentTimeMillis();
// 鏍規嵁緋葷粺鏃墮棿鐢熸垚涓婁紶鍚庝繚瀛樼殑鏂囦歡鍚?br /> String prefix = String.valueOf(now);
// 淇濆瓨鐨勬渶緇堟枃浠跺畬鏁磋礬寰?淇濆瓨鍦╳eb鏍圭洰褰曚笅鐨剈pload鐩綍涓?br /> String u_name = request.getRealPath("/") + "upload/"
+ prefix + "." + t_ext;
//鍘熸潵鐨勬枃浠跺悕
path=request.getRealPath("/") + "upload/"+path;
try {
// 淇濆瓨鏂囦歡
fileItem.write(new File(path));
response.setStatus(200);
out.println("{message:\"鏂囦歡涓婁紶鎴愬姛. 宸蹭繚瀛樹負: " + prefix + "." + t_ext
+ " 鏂囦歡澶у皬: " + size + "瀛楄妭\"}");
} catch (Exception e) {
e.printStackTrace();
}
}
}
}
JS錛?br />
function ajaxFileUpload()
{
$("#loading")
.ajaxStart(function(){
$(this).show();
})//寮濮嬩笂浼犳枃浠舵椂鏄劇ず涓涓浘鐗?br /> .ajaxComplete(function(){
$(this).hide();
});//鏂囦歡涓婁紶瀹屾垚灝嗗浘鐗囬殣钘忚搗鏉?br />
$.ajaxFileUpload
(
{
url:'PhotoUpServlet',//鐢ㄤ簬鏂囦歡涓婁紶鐨勬湇鍔″櫒绔姹傚湴鍧
secureuri:false,//涓鑸緗負false
fileElementId:'fileField',//鏂囦歡涓婁紶絀洪棿鐨刬d灞炴?nbsp; <input type="file" id="file" name="file" />
dataType: 'json',//榪斿洖鍊肩被鍨?涓鑸緗負json
success: function (data, status) //鏈嶅姟鍣ㄦ垚鍔熷搷搴斿鐞嗗嚱鏁?br /> {
//alert(data.message);//浠庢湇鍔″櫒榪斿洖鐨刯son涓彇鍑簃essage涓殑鏁版嵁,鍏朵腑message涓哄湪struts2涓畾涔夌殑鎴愬憳鍙橀噺
$('#myspan').html(data.message);
if(typeof(data.error) != 'undefined')
{
if(data.error != '')
{
//alert(data.error);
$('#myspan').html(data.message);
}else
{
//alert(data.message);
$('#myspan').html(data.message);
}
}
},
error: function (data, status, e)//鏈嶅姟鍣ㄥ搷搴斿け璐ュ鐞嗗嚱鏁?br /> {
//alert(e);
$('#myspan').html(e);
}
}
)
return false;
}
鐣岄潰錛?br />
<body>
<img src="images/loading.gif" id="loading" style="display: none;">
<span style="color: red;" id="myspan"></span><br/>
<input type="file" id="fileField" name="file" />
<br />
<input type="button" value="涓婁紶" onclick="return ajaxFileUpload();">
</body>
web.xml:
<servlet>
<servlet-name>PhotoUpServlet</servlet-name>
<servlet-class>cn.com.seegoo.xm.front.servlets.PhotoUpServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>PhotoUpServlet</servlet-name>
<url-pattern>/PhotoUpServlet</url-pattern>
</servlet-mapping>
]]>
]]>