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jsp+ajax实现无刷新上传文件的方法

作者：xpsharp 时间：2024-04-17 10:39:30　

本文实例讲述了jsp+ajax实现无刷新上传文件的方法。分享给大家供大家参考，具体如下：

列表页：selectaddress.jsp
js页：ajax_edit.js
jsp处理页：editaddress.jsp
上传工具类：UploadUtil.java

jsp+ajax实现无刷新上传文件的方法

思想：由于安全问题，javascript操纵不了文件， 导致ajax不能动态上传文件，所以选择了iframe，

列表页把form表单提交到一个隐式的iframe里面，设置表单的属性

enctype='multipart/form-data'  target='hidden_frame'


然后，处理页处理后返回

out.println('<script>parent.callback(" 返回值 ")</script>');

列表页执行回调函数！

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("不可恢复的操作:确定要吗？"+ '\n' +"提示：如果删除大类会删除大类及下面的子类！！！");
   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("请选择要删除的项目！");
   return false;
  }
 });
});
function callback(msg) //处理JSP回调 过来的参数
{
 $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);
  //分页
 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("没有您需要的数据");
 }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">条目列表</th>
   </tr>
   <tr>
    <td width="10％" height="20" align="center" bgcolor="#009999">
     <input id="AllORNoall" type="checkbox"><label for="AllORNoall">全选</label>
     <input type="button" id="reserse" value="反选" />
    </td>
    <td width="7％" height="20" align="center" bgcolor="#009999">站点名称</td>
    <td width="7％" height="20" align="center" bgcolor="#009999">站点别名</td>
    <td width="7％" height="20" align="center" bgcolor="#009999">归类</td>
    <td width="7％" height="20" align="center" bgcolor="#009999">公司地址</td>
    <td width="7％" height="20" align="center" bgcolor="#009999">文字链接</td>
    <td width="7％" height="20" align="center" bgcolor="#009999">图片链接</td>
    <td width="7％" height="20" align="center" bgcolor="#009999">描述</td>
    <td width="7％" height="20" align="center" bgcolor="#009999">有效开始时间</td>
    <td width="7％" height="20" align="center" bgcolor="#009999">有效结束时间</td>
    <td width="7％" height="20" align="center" bgcolor="#009999">电话</td>
    <td width="7％" height="20" align="center" bgcolor="#009999">位置排序</td>
    <td width="7％" height="20" align="center" bgcolor="#009999">推荐序号</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="删除" /></td>
    <td align="center" colspan = "12">提示：双击选框修改属性值</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("图片上传");
   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)){
    // 无刷新关键的步骤，让iframe的父辈body执行callback这个函数
    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("更新失败");
  }
 }
％>

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){ //处理图片上传AJAX 关键的一步form表格里的 target='hidden_frame'提交到ID为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=edit&target=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='上传' /></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("请上传图片！");
     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)

希望本文所述对大家ajax程序设计有所帮助。

标签：jsp,ajax,无刷新,上传文件
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