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[Java教程]Ajax提交Form表单及文件上传


刚刚申请下来的博客,写得第一篇。有点小激动,本人以前是一名工业3D设计师突然有些变故做上了JavaWeb开发;

前几天,发现了一些小问题。我在写后台管理页面时,需要上传一张图片。于是我就用很普通的Form表单上传有一段Json串和图片文件;

Form表单上传图片只需要在<form>标签里加上enctype = 'multipart/form-data',这样是可以上传图片的;

但问题来了,在我进行用Form表单提交的时候直接跳出来提交返回值的页面并且原先的页面刷新;

这样我们可以先到异步的Ajax可以实现局部刷新;

废话不多说了  直接上代码;

首先是html:

<form id = "form_insert" method = "post">
<table style = "font-size: 13px; margin: 13px auto;">
<tr>
<td style = "text-align: right;">类型</td>
<td>:&nbsp;&nbsp;<input id = "acttype" style = "width:150px" class = "easyui-textbox" data-options = "required:true"></td>
</tr>
<tr><td colspan = "2" style = "height: 13px"></td>
</tr>
<tr>
<td style = "text-align: right;">名称</td>
<td>:&nbsp;&nbsp;<input id = "actname" style = "width:150px" class = "easyui-textbox" data-options = "required:true"></td>
</tr>
<tr><td colspan = "2" style = "height: 13px"></td>
</tr>
<tr>
<td style = "text-align: right;">开始时间</td>
<td>:&nbsp;&nbsp;<input id = "actstarttime" style = "width:150px" class = "easyui-datetimebox" data-options = "required:true"></td>
</tr>
<tr><td colspan = "2" style = "height: 13px"></td>
</tr>
<tr>
<td style = "text-align: right;">结束时间</td>
<td>:&nbsp;&nbsp;<input id = "actendtime" style = "width:150px" class = "easyui-datetimebox" data-options = "required:true"></td>
</tr>
<tr><td colspan = "2" style = "height: 13px"></td>
</tr>
<tr>
<td style = "text-align: right;">省</td>
<td>:&nbsp;&nbsp;<input id ="mem_Province" style = "width:150px" class = "easyui-combobox" data-options = "required:true"></td>
</tr>
<tr><td colspan="2" ></td>
</tr>
<tr>
<td >市</td>
<td>:&nbsp;&nbsp;<input id = "mem_City" style = "width:150px" class = "easyui-combobox" data-options = "required:true"></td>
</tr>
<tr><td colspan = "2" style = "height: 13px"></td>
</tr>
<tr>
<td style = "text-align: right;">门店</td>
<td>:&nbsp;&nbsp;<input id = "mem_Shop" style = "width:150px" class = "easyui-combobox" data-options = "required:true"></td>
</tr>
<tr><td colspan="2" ></td>
</tr>
<tr>
<td style = "text-align: right;">具体地址</td>
<td>:&nbsp;&nbsp;<input id = "actadd" style = "width:150px" class = "easyui-textbox" data-options = "required:true"></td>
</tr>
</table>
</form>
<form id = "form_sub" style = "font-size: 13px;">
<table >
<tr>
<td style = "text-align: right;">上传图片</td>
<td>:&nbsp;&nbsp;<input class = "easyui-filebox" name = 'photo' style = "width:153px" data-options = "required:true,prompt:'选择上传图片',buttonText:'&nbsp;选&nbsp;择&nbsp;'"></td>
<td><input type = 'text' id = "Item" name = 'item' style = "display:none;"></td>
</tr>
</table>
</form>

<div style = "text-align:right; padding:2px 5px;">
<a id = "sub" class = "easyui-linkbutton" data-options = "iconCls:'icon-ok'" href = "javascript:void(0)">
保存
</a>&nbsp;&nbsp;&nbsp;&nbsp;
<a class = "easyui-linkbutton" data-options = "iconCls:'icon-quxiao'" href = "javascript:void(0)" onclick = "window_open($('#insert_form'), 'close')">
取消
</a>&nbsp;&nbsp;&nbsp;&nbsp;
</div>

以上是html代码,为了方便大家copy,css直接在标签里了;

有很多朋友想问,为什么写两个form表单;

这是因为根据后台接收数据的需求,传的是信息变成字符串和图片;

首先把信息变成字符串;

再放到第二个Form表单里,细心地朋友发现在第二个form表单里<input>标签里style=“display:none”这是个隐藏的标签;

不错我是通过第一个form表单获取的数据通过js变成字符串再放到隐藏的标签里;

这样通过Ajax提交第二个Form表单就可以了;

js代码:

$( '#sub' ).click( function () {
  var actTimeStart1 = $ ('#actstarttime') . datebox ('getValue');
  var actTimeStart = changeDateToLong(actTimeStart1);
  var actTimeEnd1 = $('#actendtime').datebox('getValue');
  var actTimeEnd = changeDateToLong(actTimeEnd1);
  if(actTimeStart != '' && actTimeEnd != '' && (actTimeStart - actTimeEnd > 0)){
    $.messager.alert('警告','结束时间不能小于开始时间!','error');
    return false;
  }
  else{
    if ($('#form_insert').form('validate')) {
      var actType = document.getElementById("acttype").value;
      var actName = document.getElementById("actname").value;
      var actArea = document.getElementById("actadd").value;
      var actTimeStart1 = $('#actstarttime').datebox('getValue');
      var actTimeStart = changeDateToLong(actTimeStart1);
      var actTimeEnd1 = $('#actendtime').datebox('getValue');
      var actTimeEnd = changeDateToLong(actTimeEnd1);
      var t2 = $('#mem_Shop').combobox('getValue');
      var jsonObj = {actType:actType,actName:actName,actTimeStart:actTimeStart,actTimeEnd:actTimeEnd,actArea:actArea,t2:t2};
      var activityMemberJson = JSON.stringify(jsonObj);
      document.getElementById("Item").value=activityMemberJson;
      var form = new FormData(document.getElementById("form_sub"));
      $.ajax({
        url : ../activity/actionActivityInsert',  //http://www.cnblogs.com/jayxxxxxxx/
        type : "post",
        data : form, //第二个Form表单的内容
        processData : false,
        contentType : false,
        error : function(request) {

        },
        success : function(data) {
          $('#box').datagrid('reload');
        }
      });
      window_open($('#insert_form'), 'close');
    }else {
      $.messager.alert('警告' , '信息不完整!' , 'error');
    }
  }
});

大家看到了我用了FormData方法,说真的这个在html5里实在是太好用了,上传图片都不用再写enctype = 'multipart/form-data';

第一次写博客,希望大家多提一些建议;

午休中。。。。。。。