jsp+ajax实现无刷新上传文件的方法-前端开发

这篇文章主要介绍了jsp+ajax实现无刷新上传文件的方法,结合实例形式分析了ajax无刷新上传文件及jsp后台处理的相关技巧,需要的朋友可以参考下

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

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

复制代码代码如下:

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

然后，处理页处理后返回

复制代码代码如下:

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。