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jsp+ajax实现无刷新上传文件的方法

十度 Ajax 2016年03月07日 收藏

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

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

然后，处理页处理后返回
  1. out.println('<script>parent.callback(" 返回值 ")</script>');

列表页执行回调函数！

selectaddress.jsp

  1. <%@ page language="java" contentType="text/html; charset=UTF-8"
  2.  pageEncoding="UTF-8"%>
  3. <%@ page import="com.wap3.navigater.service.*" %>
  4. <%@ page import="com.wap3.navigater.dao.*" %>
  5. <%@ page import="com.wap3.navigater.pojo.*" %>
  6. <%@ page import="com.wap3.navigater.util.*" %>
  7. <%@ page import="java.util.*" %>
  8. <%@ page import="java.text.*" %>
  9. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
  10. <html>
  11. <head>
  12. <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  13. <script type="text/javascript" src="../js/jquery.js"></script>
  14. <script type="text/javascript" src="../js/ajax_edit.js"></script>
  15. <script type="text/javascript" src="../js/jquery.jclock.js"></script>
  16. <script type="text/javascript" src="../js/common.js"></script>
  17. <script type="text/javascript" src="../js/jquery.form.js"></script>
  18. <script type="text/javascript" src="../js/fileTypeJudge.js"></script>
  19. <script type="text/javascript" src="../js/jquery.datepick.js"></script>
  20. <script type="text/javascript" src="../js/jquery.datepick-zh-CN.js"></script>
  21. <link media=all href="../css/common.css" type=text/css rel=stylesheet>
  22. <title>Insert title here</title>
  23. <style type="text/css">
  24.  @import "inc/jquery.datepick.css";
  25. </style>
  26. <script type="text/javascript">
  27. var $imgthis;
  28.  $(function(){
  29.   var oldValue;
  30.   $(".package_list .edit").bind("dblclick",function(){
  31.    oldValue = $(this).text();
  32.    $(this).ajax_edit("editaddress.jsp",oldValue);
  33.   });
  34.   $(".package_list .edit_img").bind("dblclick",function(){ //
  35.    oldValue = $(this).html();
  36.    $imgthis = $(this);
  37.    $(this).parents("tr.package_list").siblings(".package_list").find(":input.cancel").trigger("click");
  38.    $(this).ajax_edit_img("editaddress.jsp",oldValue);
  39.   });
  40.   $(".package_list .edit :input[type!=file]:visible").live("blur",function(){
  41.    $(this).ajax_handle("editaddress.jsp?action=edit",oldValue);
  42.   });
  43.   $("#editcategoryName").live("change",function(){
  44.    $(this).ajax_handle("editaddress.jsp?action=edit",oldValue);
  45.   });
  46.   $("#del").click( function () {
  47.    if($(":checkbox.urlid:checked").size()>0){
  48.     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！！！");
  49.     if (result) {
  50.      var url = location.href;
  51.      alert(url);
  52.      return ;
  53.      $(".main_table").wrap("<form id='selectAddressForm' action='selectaddress.jsp?action=del' method='post'></form>");
  54.      $("#selectAddressForm").submit();
  55.     }
  56.    }else{
  57.     alert("请选择要删除的项目！");
  58.     return false;
  59.    }
  60.   });
  61.  });
  62.  function callback(msg) //处理JSP回调 过来的参数
  63.  {
  64.   $imgthis.html("<img class='logo' src='"+msg+"' title='"+msg+"' />");
  65.  }
  66. </script>
  67. </head>
  68. <body>
  69.  <%
  70.   String action = ParameterUtil.getStringParameter(request,"action","");
  71.   FriendurlDao friendurlDao = new IbatisFriendurlDao();
  72.   if("del".equals(action)){
  73.    int[] urlids = ParameterUtil.getIntArrayParams(request,"urlid");
  74.    for(int urlid : urlids){
  75.     friendurlDao.deleteFriendurlByP(urlid);
  76.    }
  77.   }
  78.   String navigaterPage = request.getRequestURL().toString();
  79.   if(request.getQueryString()!= null){
  80.    navigaterPage += "?"+request.getQueryString();
  81.   }
  82.   int categoryId = ParameterUtil.getIntParameter(request,"categoryId",0);
  83.   if(categoryId == 0){
  84.    response.sendRedirect("selectcategory.jsp");
  85.    return;
  86.   }
  87.   int pageSize = ParameterUtil.getIntParameter(request,"pageSize",10);
  88.   int pageNo = ParameterUtil.getIntParameter(request,"pageNo",1);
  89.   String orderBy = ParameterUtil.getStringParameter(request,"orderBy","sequence");
  90.   int ascOrDesc = ParameterUtil.getIntParameter(request,"ascOrDesc",0);
  91.   CategoryDao categoryDao = new IbatisCategoryDao();
  92.   Category category = categoryDao.selectCategoryByP(categoryId);
  93.   String categoryName = category.getCategoryName();
  94.   Friendurl friendurl = new Friendurl();
  95.   friendurl.setCategoryId(categoryId);
  96.   friendurl.addOrderBy(orderBy,ascOrDesc);
  97.   List<Friendurl> friendurlList = friendurlDao.selectFriendurlByE(friendurl);
  98.    //分页
  99.   int totallpage = (int) Math.ceil(((double) friendurlList .size() * 1.0D)/ (double) pageSize);
  100.   pageNo =pageNo <= 0 ? 1 : pageNo;
  101.   pageNo =pageNo > totallpage ? totallpage : pageNo;
  102.   DataPageUtil datePage = new DataPageUtil(friendurlList ,friendurlList .size(),pageSize, pageNo);
  103.   boolean hasPrerPage = datePage.hasPrevPage();
  104.   boolean hasNextPage= datePage.hasNextPage();
  105.   int curpageNo = datePage.getPageNo();
  106.   int pageCount = datePage.getPageCount();
  107.   friendurlList = DataPageUtil.subList(friendurlList, pageSize, pageNo);
  108.   if(friendurlList == null && friendurlList.size()<=0) {
  109.    out.println("没有您需要的数据");
  110.   }else{
  111.   %>
  112.   <%@include file="inc/header.jsp" %>
  113.  <div id = "mainbox">
  114.   <div class = "c1">
  115.    <table class="main_table" width="100%" border="1" cellspacing="0" cellpadding="0">
  116.     <tr>
  117.      <th align="center" height="20" colspan="13" align="center" bgcolor="#006699">条目列表</th>
  118.     </tr>
  119.     <tr>
  120.      <td width="10%" height="20" align="center" bgcolor="#009999">
  121.       <input id="AllORNoall" type="checkbox"><label for="AllORNoall">全选</label>
  122.       <input type="button" id="reserse" value="反选" />
  123.      </td>
  124.      <td width="7%" height="20" align="center" bgcolor="#009999">站点名称</td>
  125.      <td width="7%" height="20" align="center" bgcolor="#009999">站点别名</td>
  126.      <td width="7%" height="20" align="center" bgcolor="#009999">归类</td>
  127.      <td width="7%" height="20" align="center" bgcolor="#009999">公司地址</td>
  128.      <td width="7%" height="20" align="center" bgcolor="#009999">文字链接</td>
  129.      <td width="7%" height="20" align="center" bgcolor="#009999">图片链接</td>
  130.      <td width="7%" height="20" align="center" bgcolor="#009999">描述</td>
  131.      <td width="7%" height="20" align="center" bgcolor="#009999">有效开始时间</td>
  132.      <td width="7%" height="20" align="center" bgcolor="#009999">有效结束时间</td>
  133.      <td width="7%" height="20" align="center" bgcolor="#009999">电话</td>
  134.      <td width="7%" height="20" align="center" bgcolor="#009999">位置排序</td>
  135.      <td width="7%" height="20" align="center" bgcolor="#009999">推荐序号</td>
  136.     </tr>
  137.     <%
  138.      for(Friendurl friendurlTemp:friendurlList) {
  139.       int urlId = friendurlTemp.getUrlid();
  140.       String siteName = friendurlTemp.getSitename();
  141.       String alias = friendurlTemp.getAlias();
  142.       String address = friendurlTemp.getAddress();
  143.       String texturl = friendurlTemp.getTexturl();
  144.       String imageurl = friendurlTemp.getImageurl();
  145.       String description = friendurlTemp.getDescription();
  146.       Date validbegintime = friendurlTemp.getValidbegintime();
  147.       Date validendtime = friendurlTemp.getValidendtime();
  148.       String mobile = friendurlTemp.getMobile();
  149.       int sequence = friendurlTemp.getSequence();
  150.       int filter = friendurlTemp.getFilter();
  151.      %>
  152.     <tr class="package_list">
  153.      <td height="20" align="center" class="urlid_td"><input type="checkbox" name="urlid" class="id_select urlid" value=<%= urlId%> /></td>
  154.      <td height="20" align="center" class="edit sitename"><%=siteName %></td>
  155.      <td height="20" align="center" class="edit alias"><%=alias %></td>
  156.      <td height="20" align="center" class="edit categoryName"><%=categoryName%></td>
  157.      <td height="20" align="center" class="edit address"><%=address %></td>
  158.      <td height="20" align="center" class="edit texturl"><%=texturl%></td>
  159.      <td height="20" align="center" class="edit_img imageurl"><img src='<%=imageurl%>' class='logo' title='<%=imageurl%>'/></td>
  160.      <td height="20" align="center" class="edit description"><%=description%></td>
  161.      <td height="20" align="center" class="edit validbegintime"><%=validbegintime == null || "".equals(validbegintime)? "--:--" : TimeUtil.date2Str(validbegintime)%></td>
  162.      <td height="20" align="center" class="edit validendtime"><%=validendtime == null || "".equals(validendtime)? "--:--" : TimeUtil.date2Str(validendtime)%></td>
  163.      <td height="20" align="center" class="edit mobile"><%=mobile%></td>
  164.      <td height="20" align="center" class="edit sequence"><%=sequence%></td>
  165.      <td height="20" align="center" class="edit filter"><%=filter%></td>
  166.     </tr>
  167.     <%
  168.      }
  169.      %>
  170.     <tr>
  171.      <td align="center"><input type="button" id="del" value="删除" /></td>
  172.      <td align="center" colspan = "12">提示：双击选框修改属性值</td>
  173.     </tr>
  174.    </table>
  175.   </div>
  176.   <%@ include file="inc/pagination.jsp"%>
  177.  </div>
  178.  <%
  179.   }
  180.   %>
  181. <iframe name='hidden_frame' id="hidden_frame" style='display:none'></iframe>
  182. </body>
  183. </html>
  184.  

editaddress.jsp

  1. <%@ page language="java" contentType="text/html; charset=UTF-8"
  2.  pageEncoding="UTF-8"%>
  3. <%@ page import="com.wap3.navigater.util.*" %>
  4. <%@ page import="com.wap3.navigater.service.*" %>
  5. <%@ page import="com.wap3.navigater.pojo.*" %>
  6. <%@ page import="com.wap3.navigater.dao.*" %>
  7. <%@ page import="java.util.*" %>
  8. <%@ page import="java.text.*" %>
  9.  <%
  10.   String target = ParameterUtil.getStringParameter(request,"target","");
  11.   String action = ParameterUtil.getStringParameter(request,"action","");
  12.   if(!"".equals(target) && target != null && "edit".equals(action)){
  13.    int categoryId = 0;
  14.    CategoryDao categoryDao = null;
  15.    int urlid=0,status=0,sequence=0,filter=0;
  16.    String sitename=null,alias=null,texturl=null,imageurl=null,description=null,mobile=null;
  17.    Date validbegintime=null,validendtime=null;
  18.    if("imageurl".equals(target)){
  19.     System.out.println("图片上传");
  20.     UploadUtil.upload(request, response);
  21.     String imageurlpath = (String) request.getAttribute("imageurlpath");
  22.     urlid = Integer.parseInt((String)request.getAttribute("urlid"));
  23.     imageurl = (String)request.getAttribute("imageurlpath");
  24.    }else{
  25.     if("categoryName".equals(target)){
  26.      String categoryName = ParameterUtil.getStringParameter(request,"categoryName","");
  27.      Category category = new Category();
  28.       category.setCategoryName(categoryName);
  29.      categoryDao = new IbatisCategoryDao();
  30.      Category category2 = categoryDao.selectCategoryByE(category).get(0);
  31.       categoryId = category2.getCategoryId();
  32.     }else{
  33.      categoryId = ParameterUtil.getIntParameter(request,"categoryId",0);
  34.     }
  35.      urlid = ParameterUtil.getIntParameter(request,"urlid",0);
  36.      sitename = ParameterUtil.getStringParameter(request,"sitename","");
  37.      alias = ParameterUtil.getStringParameter(request,"alias","");
  38.      texturl = ParameterUtil.getStringParameter(request,"texturl","");
  39.      imageurl = ParameterUtil.getStringParameter(request,"imageurl","");
  40.      description = ParameterUtil.getStringParameter(request,"description","");
  41.      status = ParameterUtil.getIntParameter(request,"status",0);
  42.      sequence = ParameterUtil.getIntParameter(request,"sequence",0);
  43.      filter = ParameterUtil.getIntParameter(request,"filter",0);
  44.      mobile = ParameterUtil.getStringParameter(request,"mobile","");
  45.      validbegintime = ParameterUtil.getDateParameter(request,"validbegintime");
  46.      validendtime = ParameterUtil.getDateParameter(request,"validendtime");
  47.    }
  48.    Calendar beginDay=Calendar.getInstance();
  49.    Friendurl friendurl = new Friendurl();
  50.     friendurl.setUrlid(urlid);
  51.     friendurl.setSitename(sitename);
  52.     friendurl.setDescription(description);
  53.     friendurl.setTexturl(texturl);
  54.     friendurl.setImageurl(imageurl);
  55.     friendurl.setAlias(alias);
  56.     friendurl.setSequence(sequence);
  57.     friendurl.setMobile(mobile);
  58.     friendurl.setCategoryId(categoryId);
  59.     friendurl.setStatus(status);
  60.     friendurl.setValidbegintime(validbegintime);
  61.     friendurl.setValidendtime(validendtime);
  62.     friendurl.setFilter(filter);
  63.    FriendurlDao friendurlDao = new IbatisFriendurlDao();
  64.    friendurlDao.updateFriendurlByP(friendurl);
  65.    Friendurl friendurl2 = friendurlDao.selectFriendurlByE(friendurl).get(0);
  66.    if(friendurl2 != null){
  67.     String methodName = "get" + target.substring(0,1).toUpperCase()+target.substring(1);
  68.     if(target.endsWith("time")){
  69.      SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
  70.      out.println(TimeUtil.date2Str(((Date)(friendurl2.getClass().getMethod(methodName,new Class[]{}).invoke(friendurl2,new Object[]{})))));
  71.     }else if("categoryName".equals(target)){
  72.      out.println(categoryDao.selectCategoryByP(friendurl2.getCategoryId()).getCategoryName());
  73.     }else if("imageurl".equals(target)){
  74.      // 无刷新关键的步骤，让iframe的父辈body执行callback这个函数
  75.      out.println("<script>parent.callback('"+friendurl2.getClass().getMethod(methodName,new Class[]{}).invoke(friendurl2,new Object[]{})+"')</script>");
  76.     }else{
  77.      out.println(friendurl2.getClass().getMethod(methodName,new Class[]{}).invoke(friendurl2,new Object[]{}));
  78.     }
  79.    }else{
  80.     out.println("更新失败");
  81.    }
  82.   }
  83. %>
  84.  

ajax_edit.js

  1. (function(){
  2.   $.fn.extend({
  3.    ajax_edit:function(str,oldValue){
  4.     return this.each(function(){
  5.      $this = $(this);
  6.      var id;
  7.      var nameId = $this.attr("class").split(" ")[1];
  8.      var idName = $this.parents("tr.package_list").find("td:first-child :input[type=checkbox]").attr("class").split(" ")[1];
  9.      id = $this.siblings("."+idName+"_td").find("input").val();
  10.      if(nameId == "categoryName" && str == "editaddress.jsp"){
  11.       $this.load("categorylist.jsp",{'oldValue':oldValue,'urlid':id});
  12.      }else{
  13.       $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>");
  14.       $this.find(":input:last").focus();
  15.      }
  16.     })
  17.    },
  18.   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
  19.    return this.each(function(){
  20.     var $this = $(this);
  21.     var nameId = $this.attr("class").split(" ")[1];
  22.     var idName = $this.parents("tr.package_list").find("td:first-child :input[type=checkbox]").attr("class").split(" ")[1];
  23.     var id = $this.siblings("."+idName+"_td").find("input").val();
  24.     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>");
  25.     $this.html($imgForm);
  26.     $this.find(":input:last").focus();
  27.     $imgForm.find(":input[type=file]").bind("change",function(){
  28.      $(this).fileTypeJudge("photo");
  29.     })
  30.     $imgForm.find(":input.ok").bind("click",function(){
  31.      var $button = $(this);
  32.      if($imgForm.find(":input[type=file]").val()==''){
  33.       alert("请上传图片！");
  34.       return false;
  35.      }
  36.      $button.attr("disabled",true);
  37.      $("#selectaddressForm_img").submit();
  38.     })
  39.     $imgForm.find(":input.cancel").bind("click",function(){
  40.      $(this).parents(".edit_img").html(oldValue);
  41.     });
  42.    })
  43.   },
  44.   ajax_handle:function(str,oldValue){
  45.     return this.each(function(){
  46.      var $this = $(this);
  47.      setTimeout(function(){
  48.      if(!$("div").hasClass("datepick-control") || !$("div .datepick-control").is(":visible")){
  49.       if(oldValue != $this.val() && $this.val() !="" ){
  50.          $.post(
  51.           str,$("#selectaddressForm").serialize(),
  52.           function(data){
  53.            $this.parents(".edit").text(data.trim()).css("color","red");
  54.           }
  55.          )
  56.       }else{
  57.        $this.parents(".edit").text(oldValue);
  58.       }
  59.      }
  60.      },1000);
  61.     })
  62.    }
  63.   })
  64. })(jQuery)
  65.  

希望本文所述对大家ajax程序设计有所帮助。

jspajax无刷新上传文件
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