本文實例講述了jsp+ajax實現無刷新上傳文件的方法。，具體如下：
列表頁：selectaddress.jsp
js頁：ajax_edit.js
jsp處理頁：editaddress.jsp
上傳工具類：UploadUtil.java
思想：由于安全問題，javascript操縱不了文件， 導致ajax不能動態上傳文件，所以選擇了iframe，
列表頁把form表單提交到一個隱式的iframe里面，設置表單的屬性 代碼如下:enctype='multipart/form-data' target='hidden_frame'
然后，處理頁處理后返回 代碼如下:out.println('<script>parent.callback(" 返回值 ")</script>');
列表頁執行回調函數！
selectaddress.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><%@ page import="com.wap3.navigater.service.*" %><%@ page import="com.wap3.navigater.dao.*" %><%@ page import="com.wap3.navigater.pojo.*" %><%@ page import="com.wap3.navigater.util.*" %><%@ page import="java.util.*" %><%@ page import="java.text.*" %><!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"><script type="text/javascript" src="../js/jquery.js"></script><script type="text/javascript" src="../js/ajax_edit.js"></script><script type="text/javascript" src="../js/jquery.jclock.js"></script><script type="text/javascript" src="../js/common.js"></script><script type="text/javascript" src="../js/jquery.form.js"></script><script type="text/javascript" src="../js/fileTypeJudge.js"></script><script type="text/javascript" src="../js/jquery.datepick.js"></script><script type="text/javascript" src="../js/jquery.datepick-zh-CN.js"></script><link media=all href="../css/common.css" type=text/css rel=stylesheet><title>Insert title here</title><style type="text/css"> @import "inc/jquery.datepick.css";</style><script type="text/javascript">var $imgthis; $(function(){ var oldValue; $(".package_list .edit").bind("dblclick",function(){ oldValue = $(this).text(); $(this).ajax_edit("editaddress.jsp",oldValue); }); $(".package_list .edit_img").bind("dblclick",function(){ // oldValue = $(this).html(); $imgthis = $(this); $(this).parents("tr.package_list").siblings(".package_list").find(":input.cancel").trigger("click"); $(this).ajax_edit_img("editaddress.jsp",oldValue); }); $(".package_list .edit :input[type!=file]:visible").live("blur",function(){ $(this).ajax_handle("editaddress.jsp?action=edit",oldValue); }); $("#editcategoryName").live("change",function(){ $(this).ajax_handle("editaddress.jsp?action=edit",oldValue); }); $("#del").click( function () { if($(":checkbox.urlid:checked").size()>0){ var result = confirm("不可恢復的操作:確定要嗎？"+ '/n' +"提示：如果刪除大類會刪除大類及下面的子類?。?！"); if (result) { var url = location.href; alert(url); return ; $(".main_table").wrap("<form id='selectAddressForm' action='selectaddress.jsp?action=del' method='post'></form>"); $("#selectAddressForm").submit(); } }else{ alert("請選擇要刪除的項目！"); return false; } }); }); function callback(msg) //處理JSP回調 過來的參數 { $imgthis.html("<img class='logo' src='"+msg+"' title='"+msg+"' />"); }</script></head><body> <% String action = ParameterUtil.getStringParameter(request,"action",""); FriendurlDao friendurlDao = new IbatisFriendurlDao(); if("del".equals(action)){ int[] urlids = ParameterUtil.getIntArrayParams(request,"urlid"); for(int urlid : urlids){ friendurlDao.deleteFriendurlByP(urlid); } } String navigaterPage = request.getRequestURL().toString(); if(request.getQueryString()!= null){ navigaterPage += "?"+request.getQueryString(); } int categoryId = ParameterUtil.getIntParameter(request,"categoryId",0); if(categoryId == 0){ response.sendRedirect("selectcategory.jsp"); return; } int pageSize = ParameterUtil.getIntParameter(request,"pageSize",10); int pageNo = ParameterUtil.getIntParameter(request,"pageNo",1); String orderBy = ParameterUtil.getStringParameter(request,"orderBy","sequence"); int ascOrDesc = ParameterUtil.getIntParameter(request,"ascOrDesc",0); CategoryDao categoryDao = new IbatisCategoryDao(); Category category = categoryDao.selectCategoryByP(categoryId); String categoryName = category.getCategoryName(); Friendurl friendurl = new Friendurl(); friendurl.setCategoryId(categoryId); friendurl.addOrderBy(orderBy,ascOrDesc); List<Friendurl> friendurlList = friendurlDao.selectFriendurlByE(friendurl); //分頁 int totallpage = (int) Math.ceil(((double) friendurlList .size() * 1.0D)/ (double) pageSize); pageNo =pageNo <= 0 ? 1 : pageNo; pageNo =pageNo > totallpage ? totallpage : pageNo; DataPageUtil datePage = new DataPageUtil(friendurlList ,friendurlList .size(),pageSize, pageNo); boolean hasPrerPage = datePage.hasPrevPage(); boolean hasNextPage= datePage.hasNextPage(); int curpageNo = datePage.getPageNo(); int pageCount = datePage.getPageCount(); friendurlList = DataPageUtil.subList(friendurlList, pageSize, pageNo); if(friendurlList == null && friendurlList.size()<=0) { out.println("沒有您需要的數據"); }else{ %> <%@include file="inc/header.jsp" %> <div id = "mainbox"> <div class = "c1"> <table class="main_table" width="100%" border="1" cellspacing="0" cellpadding="0"> <tr> <th align="center" height="20" colspan="13" align="center" bgcolor="#006699">條目列表</th> </tr> <tr> <td width="10%" height="20" align="center" bgcolor="#009999"> <input id="AllORNoall" type="checkbox"><label for="AllORNoall">全選</label> <input type="button" id="reserse" value="反選" /> </td> <td width="7%" height="20" align="center" bgcolor="#009999">站點名稱</td> <td width="7%" height="20" align="center" bgcolor="#009999">站點別名</td> <td width="7%" height="20" align="center" bgcolor="#009999">歸類</td> <td width="7%" height="20" align="center" bgcolor="#009999">公司地址</td> <td width="7%" height="20" align="center" bgcolor="#009999">文字鏈接</td> <td width="7%" height="20" align="center" bgcolor="#009999">圖片鏈接</td> <td width="7%" height="20" align="center" bgcolor="#009999">描述</td> <td width="7%" height="20" align="center" bgcolor="#009999">有效開始時間</td> <td width="7%" height="20" align="center" bgcolor="#009999">有效結束時間</td> <td width="7%" height="20" align="center" bgcolor="#009999">電話</td> <td width="7%" height="20" align="center" bgcolor="#009999">位置排序</td> <td width="7%" height="20" align="center" bgcolor="#009999">推薦序號</td> </tr> <% for(Friendurl friendurlTemp:friendurlList) { int urlId = friendurlTemp.getUrlid(); String siteName = friendurlTemp.getSitename(); String alias = friendurlTemp.getAlias(); String address = friendurlTemp.getAddress(); String texturl = friendurlTemp.getTexturl(); String imageurl = friendurlTemp.getImageurl(); String description = friendurlTemp.getDescription(); Date validbegintime = friendurlTemp.getValidbegintime(); Date validendtime = friendurlTemp.getValidendtime(); String mobile = friendurlTemp.getMobile(); int sequence = friendurlTemp.getSequence(); int filter = friendurlTemp.getFilter(); %> <tr class="package_list"> <td height="20" align="center" class="urlid_td"><input type="checkbox" name="urlid" class="id_select urlid" value=<%= urlId%> /></td> <td height="20" align="center" class="edit sitename"><%=siteName %></td> <td height="20" align="center" class="edit alias"><%=alias %></td> <td height="20" align="center" class="edit categoryName"><%=categoryName%></td> <td height="20" align="center" class="edit address"><%=address %></td> <td height="20" align="center" class="edit texturl"><%=texturl%></td> <td height="20" align="center" class="edit_img imageurl"><img src='<%=imageurl%>' class='logo' title='<%=imageurl%>'/></td> <td height="20" align="center" class="edit description"><%=description%></td> <td height="20" align="center" class="edit validbegintime"><%=validbegintime == null || "".equals(validbegintime)? "--:--" : TimeUtil.date2Str(validbegintime)%></td> <td height="20" align="center" class="edit validendtime"><%=validendtime == null || "".equals(validendtime)? "--:--" : TimeUtil.date2Str(validendtime)%></td> <td height="20" align="center" class="edit mobile"><%=mobile%></td> <td height="20" align="center" class="edit sequence"><%=sequence%></td> <td height="20" align="center" class="edit filter"><%=filter%></td> </tr> <% } %> <tr> <td align="center"><input type="button" id="del" value="刪除" /></td> <td align="center" colspan = "12">提示：雙擊選框修改屬性值</td> </tr> </table> </div> <%@ include file="inc/pagination.jsp"%> </div> <% } %><iframe name='hidden_frame' id="hidden_frame" style='display:none'></iframe></body></html>
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