嗨，我想使用 ajax 和 Apache Commons File Upload 进行文件上传。在 Servlet 中我有:
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, java.io.IOException {
System.out.println(response.getCharacterEncoding());
response.setCharacterEncoding("UTF-8");
System.out.println(response.getCharacterEncoding());
response.setContentType("text/html");
PrintWriter writer = response.getWriter();
writer.println("wtpwebapps<br/>");
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
if (!isMultipart) {
writer.println("<HTML>");
writer.println("<HEAD <TITLE> Upload4 </TITLE> </HEAD>");
writer.println("<BODY>");
writer.println("<FORM action = \"Upload_Servlet\" method = \"post\" enctype = \"multipart/form-data\">");
writer.println("<INPUT type = file name = ufile>");
writer.println("<INPUT type = submit value = \"Attach\">");
writer.println("<h1>its not multipart</h1>");
writer.println("</FORM>");
writer.println("</BODY>");
writer.println("</HTML>");
return;
}
FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload = new ServletFileUpload(factory);
List<FileItem> list=null;
String mifpath= "1";
String path = " ";
String mif = " ";
String from = "\\\\";
String to ="/";
String error="";
try{
list = upload.parseRequest(request);
Iterator<FileItem> it = list.iterator();
response.setContentType("text/html");
while ( it.hasNext() )
{
FileItem item = (FileItem) it.next();
File disk = new File("C:/uploaded_files/"+item.getName());
path = disk.toString();
String code = new String(path.substring(path.lastIndexOf("."), path.length()).getBytes("ISO-8859-1"),"utf-8");
if (code.equalsIgnoreCase(".zip"))
{
mifpath=path;
mif = mifpath.replaceAll(from, to);
item.write(disk);
error=unzip.unpack(mif, "C:/uploaded_files");
}
else
{
error = "Выбранный файл не является архивом zip";
}
}
}
catch ( Exception e ) {
log( "Upload Error" , e);
}
request.setAttribute("error", error);
request.getRequestDispatcher("/Home.jsp").forward(request, response);
// String redictedURL="http://localhost:8080/redicted_test/Home.jsp";
// response.sendRedirect(redictedURL);
writer.close();
}
}
但我不知道在客户端做什么。
尝试使用ajaxfileupload库，但没有任何效果。
jsp
<%@ page import="java.sql.DriverManager"%>
<%@ page import="java.sql.Connection"%>
<%@ page import="java.sql.SQLException"%>
<%@ page import="java.sql.Statement"%>
<%@ page import="java.sql.ResultSet"%>
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>OpenLayers map preview</title>
<link href="http://localhost:8080/geoserver/openlayers/theme/default/style.css" type="text/css"/>
<link href="fileuploader.css" type="text/css"/>
<script src="jquery.min.js"></script>
<script src="ajaxfileupload.js"></script>
<script src="fileuploader.js"></script>
<style type="text/css">
/*<![CDATA[*/
div.container {
width: 100%;
float: left;
margin-right: -270px;
}
div.content {
margin-right: 270px;
}
div.info{
width: 270px;
float: right;
}
div.clearing {
height: 0;
clear: both;
}
div.list {background-color:#dddddd; border-right:2px dashed #717dc9; width:250px; float:right; margin-left:10px;height:400}
div.upload{background-color:#dddddd; height:190px; width:252px; float: right; margin-top:10px }
div.listtitle {margin-left:10px; background-color:#dddddd}
div.check {width:50%;float: left}
div.filelist {overflow: auto; height:310px; margin-left:10px}
div.upload_int{
margin-left:10px
}
/* General settings */
body {
font-family: Verdana, Geneva, Arial, Helvetica, sans-serif;
font-size: small;
sans-serif; width:700px; margin:100px auto;
}
/* The map and the location bar */
#map {
clear: both;
position: relative;
max-width: 1000px;
min-width: 100px;
height: 590px;
border: 1px solid black;
}
/*]]>*/
</style>
<!-- Import OpenLayers, reduced, wms read only version -->
<script src="Scripts/OpenLayers/OpenLayers.js" type="text/javascript">
</script>
<script defer="defer" type="text/javascript">
var map;
var ch=[];
var tiled;
function init(){
var bounds = new OpenLayers.Bounds(6359825.735024724,6796708.483322172,9197952.978460854,10728325.920322442);
var options = {
controls: [],
maxExtent: bounds,
maxResolution: 156543.0399,
projection: "EPSG:900913",
units: 'm'
};
map = new OpenLayers.Map('map', options);
var fromProjection = new OpenLayers.Projection("EPSG:4326"); // Transform from WGS 1984
var toProjection = new OpenLayers.Projection("EPSG:900913");
// setup tiled layer
osm = new OpenLayers.Layer.OSM( "OpenStreet Maps");
map.addLayers([osm]);
// build up all controls
map.addControl(new OpenLayers.Control.PanZoomBar({
position: new OpenLayers.Pixel(2, 15)
}));
map.addControl(new OpenLayers.Control.Navigation());
map.addControl(new OpenLayers.Control.Scale($('scale')));
map.addControl( new OpenLayers.Control.LayerSwitcher() );
map.addControl(new OpenLayers.Control.MousePosition({element: $('location')}));
map.zoomToExtent(bounds);
//---------------
document.getElementById("check").onclick=function(){
var count = 0;
var inputs = document.getElementsByTagName('input');
for (var j = 0; j < inputs.length; j++){
if (inputs[j].type == 'checkbox')
{
count++;
}
}
id=[];
var doc;
var i=0;
//var params;
var obj_id=" ";
var or ="or";
var fin_obj="";
var filter="";
var div = document.getElementById("list");
elements = getElementsByClass('myclass', div);
var b;
for(b=0;b<elements.length;b++)
{
if(elements[b].checked)
{id.push(elements[b].getAttribute('value'));
}
}
/*while(++i <= count){
doc=document.getElementById("check"+i)
if(doc.checked)
{checked.push(i);
id.push(doc.getAttribute('value'));
}
}*/
ch=id;
for(var k=1;k<id.length;k++)
{
obj_id=" "+or+" id="+id[k];
fin_obj=fin_obj+obj_id;
}
filter="id="+id[0]+fin_obj;
layer.mergeNewParams({CQL_FILTER:filter});
wms = new OpenLayers.Format.WMSCapabilities();
OpenLayers.Request.GET({
//url:"wmsURL&service=WMS&request=GetCapabilities",
url:"http://localhost:8080/geoserver/wms/filedata?request=GetCapabilities",
success: function(e){
console.log(e);
var response = wms.read(e.responseText);
var capability = response.capability;
for (var i=0, len=capability.layers.length; i<len; i+=1) {
var layerObj = capability.layers[i];
if (layerObj.name === 'cite:filedata') {
extend=OpenLayers.Bounds.fromArray(layerObj.llbbox);
map.zoomToExtent(extend.transform(fromProjection,toProjection));
break;
}
}
}
});
position = new OpenLayers.Bounds(60.67,56.84,60.68,56.87).transform(fromProjection,toProjection);
}
}
//принятие участков
function accepting()
{
for(var k=0;k<ch.length;k++)
{
document.getElementById("check"+ch[k]).nextSibling.style.color='black';
}
$.post(
"setStatus.jsp",
{ids:ch.toString()}
);
}
//удаление участков
function deleting()
{
$.post(
"deletePoly.jsp",
{ids:ch.toString()},
function(per){
$("#WRAPlist").load("listing.jsp");
}
);
}
if(document.getElementsByClassName) {
getElementsByClass = function(classList, node) {
return (node || document).getElementsByClassName(classList)
}
} else {
getElementsByClass = function(classList, node) {
var node = node || document,
list = node.getElementsByTagName('*'),
length = list.length,
classArray = classList.split(/\s+/),
classes = classArray.length,
result = [], i,j
for(i = 0; i < length; i++) {
for(j = 0; j < classes; j++) {
if(list[i].className.search('\\b' + classArray[j] + '\\b') != -1) {
result.push(list[i])
break
}
}
}
return result
}
}
var er='${error}';
if (er!="")
{
alert("${error}");
}
window.onload = createUploader;
function createUploader(){
var uploader = new qq.FileUploader({
element: document.getElementById('file-uploader-demo1'),
action: 'Upload_Servlet',
debug: true,
allowedExtensions:['jpg', 'jpeg', 'png', 'gif'],
sizeLimit: 6000000, // max size
minSizeLimit: 11024, // min size
onComplete: function(){
populate();
}
});
}
</script>
</head>
<body onload="init()">
<div class="container">
<div class="content">
<div class="ol"> <div id="map"></div> </div>
</div>
</div>
<div class="info">
<div class="list">
<div class="listtitle">
<div>
<h2>Список участков</h2>
</div>
<div class="check">
<input type="button" id="check" value="Отобразить">
</div>
<div class="acc">
<input type="button" id="accept" onclick="accepting()" value="Принять">
</div>
</div>
<div class="filelist" id="WRAPlist">
<%
Class.forName("org.postgresql.Driver");
Connection conn= null;
conn = DriverManager.getConnection("jdbc:postgresql://localhost:5432/postgis","postgres","123456");
Statement sta = null;
sta = conn.createStatement();
String fileName= "";
Integer fileId=null;
String fileStatus ="";
ResultSet r=sta.executeQuery("SELECT id, name, status FROM filestatus");
String acc="Принят ";
while(r.next())
{
fileId=r.getInt("id");
fileName=r.getString("name");
fileStatus=r.getString("status");
if(fileStatus.equalsIgnoreCase(acc))
{
out.write("<input type='checkbox' class='myclass' id='check"+fileId+"' name='"+fileName+"' value='"+fileId+"'/><label for=check"+fileId+">"+fileName+"</label><br>");
}
else
{
out.write("<input type='checkbox' class='myclass' id='check"+fileId+"' name='"+fileName+"' value='"+fileId+"'/><label for=check"+fileId+" style='color:blue'>"+fileName+"</label><br>");
}
}
r.close();
sta.close();
conn.close();
%>
</div>
</div>
<div class="upload">
<div class="upload_int">
<h2>Загрузка файлов</h2>
<form action="" method="post" enctype="multipart/form-data">
<div id="up">
<input id="fileUpload1" type="file" name="fileUpload1"value="Browse..."/>
</div>
<div>
<button class="button" id="buttonUpload" onclick="return ajaxFileUpload();">Загрузить</button>
<input type="button" id="del" onclick="deleting()" value="Удалить">
</div>
</form>
</div>
<div id="file-uploader-demo1">
<noscript>
<p>Please enable JavaScript to use file uploader.</p>
<!-- or put a simple form for upload here -->
</noscript>
</div>
</div>
</div>
<div class="clearing"> </div>
</body>
</html>
我在这里出错了还是只是想用另一种方法来解决这个问题？
最佳答案
使用这个jquery插件上传ajax upload
<script>
window.onload = createUploader;
function createUploader(){
var uploader = new qq.FileUploader({
element: document.getElementById('file-uploader'),
action: 'Upload_Servlet',
debug: true,
allowedExtensions:['jpg', 'jpeg', 'png', 'gif'],
sizeLimit: 6000000, // max size
minSizeLimit: 11024, // min size
onComplete: function(){
}
});
}
</script>
它可能不适用于 IE6，但它是一个很棒的插件。
关于java - 使用ajax和java进行文件上传，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/11240460/