使用extjs上传文件到java后台的完整代码案例，本案例经过多次重复利用，贴出来，下次用的时候方便直接复制过去，也方便兄弟们。
1.extjs 弹出上传文件的窗口方法：
function showUploadWin(htmlText){
var uploadWin=Ext.getCmp("uploadFileWin");
if(!uploadWin){
uploadWin=new Ext.Window({
modal :true,
title:"导入word文档",
width:400,
id:"uploadFileWin",
height:230,
bodyBorder:false,
layout:"fit",
bodyStyle:"background-color:#FFF",
items:[{
border:false,
id:"uploadForm",
xtype:"form",
fileUpload: true ,
style:"padding-top:50px;",
items:[{
xtype:'textfield',
inputType:'file',
id:"uploadFileTextF",
name:'uploadFile',
labelStyle : 'text-align:right;font-weight:bold',
allowBlank: false ,
fieldLabel:'选择文件*'
}]
}],
buttonAlign:"center",
buttons:[{
text:"确定",
handler:function(){
var form=Ext.getCmp("uploadForm").form;
var fileName=Ext.getCmp("uploadFileTextF").getValue();
fileName=fileName.split('.');
fileName=fileName[fileName.length-1];
if(fileName!="doc"&&fileName!="docx"){
Ext.Msg.alert("系统提示","必须选择Microsoft Office Word 文档！");
return false;
}
if (form.isValid()){
form.submit({
method:'post',
url:'../WebManage?action=importWord', // 根据自己系统的需要调用程序处理上传文件 24
waitMsg:'文件上传中...',
success: function (form,action) {
if(Ext.getCmp("title").getValue()=="")Ext.getCmp("title").setValue(action.result.fileName);
htmlText.html(action.result.msg);
Ext.Msg.alert("系统提示", "文件导入成功！(注：如有个别图片样式问题请截图插入)");
Ext.getCmp("uploadFileWin").close();
},
failure: function (form,action){
Ext.Msg.alert("系统提示", "文件上传失败！");
}
});
} else {
Ext.Msg.alert("系统提示","请选择文件后再上传！");
}
}
},{
text:"关闭",
handler:function(){
Ext.getCmp("uploadFileWin").close();
}
}]
});
}
uploadWin.show();
}2.java后台接收extjs上传的文件的代码
String action=request.getParameter("action");
if(action.equals("importWord")){
int maxPostSize = 1000 * 1024 * 1024;
FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload servletFileUpload = new ServletFileUpload(factory);
servletFileUpload.setSizeMax(maxPostSize);
List fileItems = servletFileUpload.parseRequest(request);
Iterator iter = fileItems.iterator();
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();
if (!item.isFormField()) {// 是文件
String realPath=request.getSession().getServletContext().getRealPath("");
java.util.Date date=new java.util.Date();
String imgPath="/img/fileImg/"+date.getTime()+"/";
realPath=realPath+imgPath;
String fileName=item.getName();
String returnWordStr=WordToHtml.convert2Html(item.getInputStream(),realPath,imgPath);
PrintWriter out = response.getWriter();
returnWordStr = returnWordStr.replaceAll("\n", "").replaceAll("\r", "");
returnWordStr = returnWordStr.replaceAll( "'", "'");
//returnWordStr = returnWordStr.replaceAll( "&", "&");
returnWordStr = returnWordStr.replaceAll( "\"", ""); //"
//returnWordStr = returnWordStr.replaceAll( "\t", " ");// 替换跳格
//returnWordStr = returnWordStr.replaceAll( " ", " ");// 替换空格
//returnWordStr = returnWordStr.replaceAll("<", "<");
//returnWordStr = returnWordStr.replaceAll( ">", ">");
out.print("{success:true,msg:'"+returnWordStr+"',fileName:'"+fileName+"'}");
out.flush();
out.close();
}
}
}