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jsp+ajax實(shí)現(xiàn)無刷新上傳文件的方法
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本文實(shí)例講述了jsp+ajax實(shí)現(xiàn)無刷新上傳文件的方法。分享給大家供大家參考，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(dǎo)致ajax不能動(dòng)態(tài)上傳文件，所以選擇了iframe，

列表頁把form表單提交到一個(gè)隱式的iframe里面，設(shè)置表單的屬性

復(fù)制代碼 代碼如下:
enctype='multipart/form-data'  target='hidden_frame'

然后，處理頁處理后返回
復(fù)制代碼 代碼如下:
out.println('script>parent.callback(" 返回值 ")/script>');

列表頁執(zhí)行回調(diào)函數(shù)！

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(fù)的操作:確定要嗎？"+ '\n' +"提示：如果刪除大類會(huì)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(qǐng)選擇要?jiǎng)h除的項(xiàng)目！");
    return false;
   }
  });
 });
 function callback(msg) //處理JSP回調(diào) 過來的參數(shù)
 {
  $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);
  ListFriendurl> 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(shù)據(jù)");
  }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(diǎn)名稱/td>
     td width="7%" height="20" align="center" bgcolor="#009999">站點(diǎn)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(shí)間/td>
     td width="7%" height="20" align="center" bgcolor="#009999">有效結(jié)束時(shí)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(hào)/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>

editaddress.jsp

%@ page language="java" contentType="text/html; charset=UTF-8"
 pageEncoding="UTF-8"%>
%@ page import="com.wap3.navigater.util.*" %>
%@ page import="com.wap3.navigater.service.*" %>
%@ page import="com.wap3.navigater.pojo.*" %>
%@ page import="com.wap3.navigater.dao.*" %>
%@ page import="java.util.*" %>
%@ page import="java.text.*" %>
 %
  String target = ParameterUtil.getStringParameter(request,"target","");
  String action = ParameterUtil.getStringParameter(request,"action","");
  if(!"".equals(target)  target != null  "edit".equals(action)){
   int categoryId = 0;
   CategoryDao categoryDao = null;
   int urlid=0,status=0,sequence=0,filter=0;
   String sitename=null,alias=null,texturl=null,imageurl=null,description=null,mobile=null;
   Date validbegintime=null,validendtime=null;
   if("imageurl".equals(target)){
    System.out.println("圖片上傳");
    UploadUtil.upload(request, response);
    String imageurlpath = (String) request.getAttribute("imageurlpath");
    urlid = Integer.parseInt((String)request.getAttribute("urlid"));
    imageurl = (String)request.getAttribute("imageurlpath");
   }else{
    if("categoryName".equals(target)){
     String categoryName = ParameterUtil.getStringParameter(request,"categoryName","");
     Category category = new Category();
      category.setCategoryName(categoryName);
     categoryDao = new IbatisCategoryDao();
     Category category2 = categoryDao.selectCategoryByE(category).get(0);
      categoryId = category2.getCategoryId();
    }else{
     categoryId = ParameterUtil.getIntParameter(request,"categoryId",0);
    }
     urlid = ParameterUtil.getIntParameter(request,"urlid",0);
     sitename = ParameterUtil.getStringParameter(request,"sitename","");
     alias = ParameterUtil.getStringParameter(request,"alias","");
     texturl = ParameterUtil.getStringParameter(request,"texturl","");
     imageurl = ParameterUtil.getStringParameter(request,"imageurl","");
     description = ParameterUtil.getStringParameter(request,"description","");
     status = ParameterUtil.getIntParameter(request,"status",0);
     sequence = ParameterUtil.getIntParameter(request,"sequence",0);
     filter = ParameterUtil.getIntParameter(request,"filter",0);
     mobile = ParameterUtil.getStringParameter(request,"mobile","");
     validbegintime = ParameterUtil.getDateParameter(request,"validbegintime");
     validendtime = ParameterUtil.getDateParameter(request,"validendtime");
   }
   Calendar beginDay=Calendar.getInstance();
   Friendurl friendurl = new Friendurl();
    friendurl.setUrlid(urlid);
    friendurl.setSitename(sitename);
    friendurl.setDescription(description);
    friendurl.setTexturl(texturl);
    friendurl.setImageurl(imageurl);
    friendurl.setAlias(alias);
    friendurl.setSequence(sequence);
    friendurl.setMobile(mobile);
    friendurl.setCategoryId(categoryId);
    friendurl.setStatus(status);
    friendurl.setValidbegintime(validbegintime);
    friendurl.setValidendtime(validendtime);
    friendurl.setFilter(filter);
   FriendurlDao friendurlDao = new IbatisFriendurlDao();
   friendurlDao.updateFriendurlByP(friendurl);
   Friendurl friendurl2 = friendurlDao.selectFriendurlByE(friendurl).get(0);
   if(friendurl2 != null){
    String methodName = "get" + target.substring(0,1).toUpperCase()+target.substring(1);
    if(target.endsWith("time")){
     SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
     out.println(TimeUtil.date2Str(((Date)(friendurl2.getClass().getMethod(methodName,new Class[]{}).invoke(friendurl2,new Object[]{})))));
    }else if("categoryName".equals(target)){
     out.println(categoryDao.selectCategoryByP(friendurl2.getCategoryId()).getCategoryName());
    }else if("imageurl".equals(target)){
     // 無刷新關(guān)鍵的步驟，讓iframe的父輩body執(zhí)行callback這個(gè)函數(shù)
     out.println("script>parent.callback('"+friendurl2.getClass().getMethod(methodName,new Class[]{}).invoke(friendurl2,new Object[]{})+"')/script>");
    }else{
     out.println(friendurl2.getClass().getMethod(methodName,new Class[]{}).invoke(friendurl2,new Object[]{}));
    }
   }else{
    out.println("更新失敗");
   }
  }
%>

ajax_edit.js

(function(){
  $.fn.extend({
   ajax_edit:function(str,oldValue){
    return this.each(function(){
     $this = $(this);
     var id;
     var nameId = $this.attr("class").split(" ")[1];
     var idName = $this.parents("tr.package_list").find("td:first-child :input[type=checkbox]").attr("class").split(" ")[1];
     id = $this.siblings("."+idName+"_td").find("input").val();
     if(nameId == "categoryName"  str == "editaddress.jsp"){
      $this.load("categorylist.jsp",{'oldValue':oldValue,'urlid':id});
     }else{
      $this.html("form id='selectaddressForm'>input type='hidden' name='"+idName+"' value='"+id+"' />input type='hidden' name='target' value='"+nameId+"' />input type='text' name='"+nameId+"' value='"+oldValue+"'/>/form>");
      $this.find(":input:last").focus();
     }
    })
   },
  ajax_edit_img:function(str,oldValue){ //處理圖片上傳AJAX 關(guān)鍵的一步form表格里的 target='hidden_frame'提交到ID為hidden_frame的iframe里面
   return this.each(function(){
    var $this = $(this);
    var nameId = $this.attr("class").split(" ")[1];
    var idName = $this.parents("tr.package_list").find("td:first-child :input[type=checkbox]").attr("class").split(" ")[1];
    var id = $this.siblings("."+idName+"_td").find("input").val();
    var $imgForm = $("form id='selectaddressForm_img' action='editaddress.jsp?action=edittarget=imageurl' method='post' enctype='multipart/form-data' target='hidden_frame'>input type='hidden' name='"+idName+"' value='"+id+"' />input type='file' name='"+nameId+"' />input type='button' class='cancel' value='取消' />input type='button' class='ok' value='上傳' />/form>");
    $this.html($imgForm);
    $this.find(":input:last").focus();
    $imgForm.find(":input[type=file]").bind("change",function(){
     $(this).fileTypeJudge("photo");
    })
    $imgForm.find(":input.ok").bind("click",function(){
     var $button = $(this);
     if($imgForm.find(":input[type=file]").val()==''){
      alert("請(qǐng)上傳圖片！");
      return false;
     }
     $button.attr("disabled",true);
     $("#selectaddressForm_img").submit();
    })
    $imgForm.find(":input.cancel").bind("click",function(){
     $(this).parents(".edit_img").html(oldValue);
    });
   })
  },
  ajax_handle:function(str,oldValue){
    return this.each(function(){
     var $this = $(this);
     setTimeout(function(){
     if(!$("div").hasClass("datepick-control") || !$("div .datepick-control").is(":visible")){
      if(oldValue != $this.val()  $this.val() !="" ){
         $.post(
          str,$("#selectaddressForm").serialize(),
          function(data){
           $this.parents(".edit").text(data.trim()).css("color","red");
          }
         )
      }else{
       $this.parents(".edit").text(oldValue);
      }
     }
     },1000);
    })
   }
  })
})(jQuery)

希望本文所述對(duì)大家ajax程序設(shè)計(jì)有所幫助。

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