jquery+ajax+struts实现文件上传
首先在前段引入jquery.js和ajaxfileupload.js文件，一般引入放在最后面，这样可以通过jquery的jQuery.noConflict();方法避免冲突，其中jquery.js和ajaxfileupload.js建议放于引入的js中的最后面，比较容易解决冲突。引入js
<script type="text/javascript" language="javascript" src="/js/jquery-1.6.3.min.js"></script> <script type="text/javascript" language="javascript" src="/js/ajaxfileupload.js"></script>
ajaxfileupload.js
json及其依赖的jar
html:
<input type="button" value="导入" onclick="return ajaxFileUpload();" style="width: 50px; height: 18px;">
js上传方法：
jQuery.noConflict(); //解决jquery冲突问题
function ajaxFileUpload()
{
var fileVal = jQuery("#file").attr("value");
var fileValArr = fileVal.split(".");
if(fileValArr[fileValArr.length-1] != 'xls') {
alert("请上传excel文件！");
return false;
}
jQuery("#loading")
.ajaxStart(function(){
jQuery(this).show();
})//开始上传文件时显示一个图片
.ajaxComplete(function(){
jQuery(this).hide();
});//文件上传完成将图片隐藏起来
jQuery.ajaxFileUpload
(
{
url:'cjlrNewExcelAction.do',//用于文件上传的服务器端请求地址
secureuri:false,//一般设置为false 这个为空ajaxfileupload中的iframe不显示
fileElementId:'file',//文件上传空间的id属性 <input type="file" id="file" name="file" />
dataType: 'json',//返回值类型 一般设置为json
success: function (data, status) //服务器成功响应处理函数
{
//这里放入返回成功后需要处理的响应data是返回的数据
alert(data);
//逻辑处理 下面是我的逻辑处理
for(var i = 0; i< data.length; i++){
var dataVal = data[i].split("--");
var xh = dataVal[1];
var pscj = dataVal[4];
if (pscj == 'nothing') {
pscj = '';
}
var qmcj = dataVal[5];
if (qmcj == 'nothing') {
qmcj = '';
}
var wtgyy = dataVal[6];
if (wtgyy == 'nothing') {
wtgyy = '';
}
}
},
error: function (data, status, e)//服务器响应失败处理函数
{
//服务器响应失败的处理信息。
}
}
)
return false;
}
以上是js的为客户端上传，其中调用了ajaxfileupload.js中的方法。ajaxfileupload采用 jquery.extend({}),的方式在jquery中添加对象。
其中Action中负责接收数据和解析。
import java.io.BufferedOutputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import net.sf.json.JSONArray;
import org.apache.poi2.hssf.usermodel.HSSFWorkbook;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.upload.FormFile;
public class NewExcelAction extends BaseAction {
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) {
String oper = request.getParameter("oper");
HttpSession session = request.getSession(true);
if (oper == null || "".equals(oper)) {
response.setHeader("Pragma", "no-cache");
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Expires", "0");
response.setContentType("text/html;charset=UTF-8");
try {
request.setCharacterEncoding("UTF-8");
} catch (UnsupportedEncodingException e1) {
e1.printStackTrace();
}
// response.setCharacterEncoding("UTF-8");
NewExcelForm excelForm = (NewExcelForm) form;
if (excelForm.getMultipartRequestHandler().getFileElements().get(
"file") == null) {
} else {
FormFile file = (FormFile) excelForm
.getMultipartRequestHandler().getFileElements().get(
"file");
String fileName = file.getFileName();
String fileSimpleName = fileName.substring(fileName
.lastIndexOf("."));
System.out.println(fileName);
List<String> list = new ArrayList<String>();
try {
list = new UpLoadExcel()
.getExcelData(file.getInputStream());
JSONArray js = new JSONArray();
JSONArray jr = js.fromObject(list);
System.out.println(jr);
PrintWriter out = response.getWriter();
out.print(jr);
out.flush();
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
} else if ("excel".equals(oper)) {
ArrayList xsmdArrayList = (ArrayList)session.getAttribute("showInfor");
ShowXsmdVo showXsmdVo = new ShowXsmdVo();
BufferedOutputStream output;
try {
output = new BufferedOutputStream(response.getOutputStream());
response.setHeader("Content-disposition",
"attachment;filename="
+ new String("录入模板".getBytes("gbk"),
"iso8859-1") + ".xls");
HSSFWorkbook workbook = cjlrBo.createExecl(xsmdArrayList);
workbook.write(output);
output.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
}
上传的excel文件，其中public class NewExcelForm extends ActionForm {
}必须有，是为了使用ActionForm中的.getMultipartRequestHandler().getFileElements().get("file")方法， file.getInputStream()用于通过流的方式得到数据，
list = new UpLoadExcel()
.getExcelData(file.getInputStream()); 用于对得到的数据进行解析，如果是其他类型的数据就进行其他类型的解析。
JSONArray js = new JSONArray();
JSONArray jr = js.fromObject(list); 把解析到的包装成json格式，方便传输。
PrintWriter out = response.getWriter();
out.print(jr);
out.flush();
out.close(); 已流的方式写出到页面。
下面那个是下载模板方法，如果你上传的文件需要是固定格式，可以以模板下载的方式下载模板。
对应的struts的配置：
<form-bean name="NewExcelForm" type="包名.NewExcelForm" />
<action path="/NewExcelAction" name="NewExcelForm" scope="request" type="包名.NewExcelAction" validate="true">
</action>
ajaxfileupload.js文件如下：
jQuery.extend({
createUploadIframe: function(id, uri)
{
//create frame
var frameId = 'jUploadFrame' + id;
if(window.ActiveXObject) {
if(jQuery.browser.version=="9.0"){
var io = document.createElement('iframe');
io.id = frameId;
io.name = frameId;
}else if(jQuery.browser.version=="6.0" || jQuery.browser.version=="7.0" || jQuery.browser.version=="8.0"){
var io = document.createElement('<iframe id="' + frameId + '" name="' + frameId + '" />');
if(typeof uri== 'boolean'){
io.src = 'javascript:false';
}
else if(typeof uri== 'string'){
io.src = uri;
}
}
}
else {
var io = document.createElement('iframe');
io.id = frameId;
io.name = frameId;
}
io.style.position = 'absolute';
io.style.top = '-1000px';
io.style.left = '-1000px';
document.body.appendChild(io);
return io;
},
createUploadForm: function(id, fileElementId)
{
//create form
var formId = 'jUploadForm' + id;
var fileId = 'jUploadFile' + id;
var form = jQuery('<form action="" method="POST" name="' + formId + '" id="' + formId + '" enctype="multipart/form-data"></form>');
var oldElement = jQuery('#' + fileElementId);
var newElement = jQuery(oldElement).clone();
jQuery(oldElement).attr('id', fileId);
jQuery(oldElement).before(newElement);
jQuery(oldElement).appendTo(form);
//set attributes
jQuery(form).css('position', 'absolute');
jQuery(form).css('top', '-1200px');
jQuery(form).css('left', '-1200px');
jQuery(form).appendTo('body');
return form;
},
addOtherRequestsToForm: function(form,data)
{
// add extra parameter
var originalElement = jQuery('<input type="hidden" name="" value="">');
for (var key in data) {
name = key;
value = data[key];
var cloneElement = originalElement.clone();
cloneElement.attr({'name':name,'value':value});
jQuery(cloneElement).appendTo(form);
}
return form;
},
ajaxFileUpload: function(s) {
// TODO introduce global settings, allowing the client to modify them for all requests, not only timeout
s = jQuery.extend({}, jQuery.ajaxSettings, s);
var id = new Date().getTime()
var form = jQuery.createUploadForm(id, s.fileElementId);
if ( s.data ) form = jQuery.addOtherRequestsToForm(form,s.data);
var io = jQuery.createUploadIframe(id, s.secureuri);
var frameId = 'jUploadFrame' + id;
var formId = 'jUploadForm' + id;
// Watch for a new set of requests
if ( s.global && ! jQuery.active++ )
{
jQuery.event.trigger( "ajaxStart" );
}
var requestDone = false;
// Create the request object
var xml = {}
if ( s.global )
jQuery.event.trigger("ajaxSend", [xml, s]);
// Wait for a response to come back
var uploadCallback = function(isTimeout)
{
var io = document.getElementById(frameId);
try
{
if(io.contentWindow)
{
xml.responseText = io.contentWindow.document.body?io.contentWindow.document.body.innerHTML:null;
xml.responseXML = io.contentWindow.document.XMLDocument?io.contentWindow.document.XMLDocument:io.contentWindow.document;
}else if(io.contentDocument)
{
xml.responseText = io.contentDocument.document.body?io.contentDocument.document.body.innerHTML:null;
xml.responseXML = io.contentDocument.document.XMLDocument?io.contentDocument.document.XMLDocument:io.contentDocument.document;
}
}catch(e)
{
jQuery.handleError(s, xml, null, e);
}
if ( xml || isTimeout == "timeout")
{
requestDone = true;
var status;
try {
status = isTimeout != "timeout" ? "success" : "error";
// Make sure that the request was successful or notmodified
if ( status != "error" )
{
// process the data (runs the xml through httpData regardless of callback)
var data = jQuery.uploadHttpData( xml, s.dataType );
// If a local callback was specified, fire it and pass it the data
if ( s.success )
s.success( data, status );
// Fire the global callback
if( s.global )
jQuery.event.trigger( "ajaxSuccess", [xml, s] );
} else
jQuery.handleError(s, xml, status);
} catch(e)
{
status = "error";
jQuery.handleError(s, xml, status, e);
}
// The request was completed
if( s.global )
jQuery.event.trigger( "ajaxComplete", [xml, s] );
// Handle the global AJAX counter
if ( s.global && ! --jQuery.active )
jQuery.event.trigger( "ajaxStop" );
// Process result
if ( s.complete )
s.complete(xml, status);
jQuery(io).unbind()
setTimeout(function()
{ try
{
jQuery(io).remove();
jQuery(form).remove();
} catch(e)
{
jQuery.handleError(s, xml, null, e);
}
}, 100)
xml = null
}
}
// Timeout checker
if ( s.timeout > 0 )
{
setTimeout(function(){
// Check to see if the request is still happening
if( !requestDone ) uploadCallback( "timeout" );
}, s.timeout);
}
try
{
// var io = jQuery('#' + frameId);
var form = jQuery('#' + formId);
jQuery(form).attr('action', s.url);
jQuery(form).attr('method', 'POST');
jQuery(form).attr('target', frameId);
if(form.encoding)
{
form.encoding = 'multipart/form-data';
}
else
{
form.enctype = 'multipart/form-data';
}
jQuery(form).submit();
} catch(e)
{
jQuery.handleError(s, xml, null, e);
}
if(window.attachEvent){
document.getElementById(frameId).attachEvent('onload', uploadCallback);
}
else{
document.getElementById(frameId).addEventListener('load', uploadCallback, false);
}
return {abort: function () {}};
},
uploadHttpData: function( r, type ) {
var data = !type;
data = type == "xml" || data ? r.responseXML : r.responseText;
// If the type is "script", eval it in global context
if ( type == "script" )
jQuery.globalEval( data );
// Get the JavaScript object, if JSON is used.
if ( type == "json" )
eval( "data = " + data );
// evaluate scripts within html
if ( type == "html" )
jQuery("<div>").html(data).evalScripts();
//alert(jQuery('param', data).each(function(){alert(jQuery(this).attr('value'));}));
return data;
}
})