jquery ajax实现文件上传提交的实战步骤
坚毅的小解同志 人气:0JQuery实现文件上传提交
定义UI结构
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.1/jquery.js"></script>
<input type="file" id="file1">
<button id="btnUpload">上传文件</button>
<img src="" alt="" style="width: 200px;" id="img1">验证是否选择了文件
$('#btnUpload').on('click', function () {
let files = $('#file1')[0].files;
if (files.length <= 0) {
return alert('请选择文件后在上传')
}
})
向FormData中追加文件并发起ajax请求
//上传文件
let fd = new FormData();
fd.append('avator', files[0]);
//发起jquery ajax请求
$.ajax({
method: 'post',
url: 'http://www.liulongbin.top:3006/api/upload/avatar',
data: fd,
processData: false,
contentType: false,
success: function (res) {
alert('上传成功')
$('#img1').attr('src', 'http://www.liulongbin.top:3006' + res.url)
console.log(res.url);
}
})jquery实现loading效果
ajaxStart（callback）
Ajax请求开始时，执行ajaxStart函数，可以在ajaxStart的callback中显示loading效果。
自jqueyr版本1.8起，该方法只能被附加到文档，$(document).ajaxStart()函数会监听文档内所有ajax请求,当ajax请求开始会触发这个函数，ajax结束则会触发ajaxStop
<img src="./自媒体资源/5-121204193933-51.gif" alt="" style="display: none;" id="loading" width="50px" height="50px">
$(document).ajaxStart(function () {
$('#loading').show()
})
$(document).ajaxStop(function () {
$('#loading').hide()
})完整代码
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.1/jquery.js"></script>
</head>
<body>
<input type="file" id="file1">
<button id="btnUpload">上传文件</button>
<br>
<img src="" alt="" style="width: 200px;" id="img1">
<img src="./自媒体资源/5-121204193933-51.gif" alt="" style="display: none;" id="loading" width="50px" height="50px">
<script>
//监听传输
$(document).ajaxStart(function () {
$('#loading').show()
})
$(document).ajaxStop(function () {
$('#loading').hide()
})
//建立单击事件
$('#btnUpload').on('click', function () {
let files = $('#file1')[0].files;
if (files.length <= 0) {
return alert('请选择文件后在上传')
}
//上传文件
let fd = new FormData();
fd.append('avator', files[0]);
//发起jquery ajax请求
$.ajax({
method: 'post',
url: 'http://www.liulongbin.top:3006/api/upload/avatar',
data: fd,
processData: false,
contentType: false,
success: function (res) {
alert('上传成功')
$('#img1').attr('src', 'http://www.liulongbin.top:3006' + res.url)
console.log(res.url);
}
})
})
</script>
</body>
补充：Jquery Ajax上传文件并提交表单其它属性
1.前端代码
$('.btn-confirm').click(function () {
console.log($( '#postForm').serialize());
var versionNo = $("#versionNo").val();
var deviceNoStr = $("input[name='deviceNoStr']").val();
var batchId = $("input[name='batchId']").val();
var formData = new FormData();
console.log($('#upfile')[0].files[0]);
formData.append("upfile",$('#upfile')[0].files[0]);
formData.append("versionNo", versionNo);
formData.append("deviceNoStr", deviceNoStr);
formData.append("batchId", batchId);
$.ajax({
url :window.CMS_URL + "/devops/operation/upgrade.shtml",
dataType:'json',
type:'POST',
async: false,
data: formData,
processData : false, // 使数据不做处理
contentType : false, // 不要设置Content-Type请求头
success: function(data){
console.log(data);
if (data.status == 'ok') {
alert('上传成功！');
}
},
error:function(response){
console.log(response);
}
});
});
<form id= "uploadForm" method= "post" enctype ="multipart/form-data">
<div class="portlet-body" style="margin: 15px 0;">
<span class="file-des">程序路径：</span>
<div class="wrap-upload" style="display: flex">
<div class="showFileName"
></div>
<a href="javascript:;" class="file btn btn-sm green">上传文件
<input type="file" name="upfile" id="upfile" placeholder="请选择文件">
</a>
<div class="fileerrorTip" style="line-height: 30px;margin-right: 10px"></div>
</div>
</div>
<div class="portlet-body">
<span class="file-des">版本号：</span>
<div class="wrap-upload item-inputs" >
<input class="form-control" type="text" name="versionNo" id="versionNo" placeholder="版本号" required>
</div>
</div>
<div style=" margin: 0px 100px;padding-top: 20px;">
<div class="btn btn-sm green control-btn-item btn-confirm" >确认</div>
<div style="margin-left: 30px;" class="btn btn-sm green control-btn-item" onclick="closePopup()">取消</div>
</div>
<input type="hidden" name="deviceNoStr" value="${(devopsParamsQo.deviceNoStr)!''}"/>
<input type="hidden" name="batchId" value="${(devopsParamsQo.batchId)!''}"/>
</form>
2.后端代码
@RequestMapping(value = "/upgrade", method = RequestMethod.POST)
@ResponseBody
public ResultVo upgrade(@RequestPart( value = "upfile", required = true) MultipartFile file,
@RequestParam(name = "versionNo", required = true) String versionNo,
@RequestParam(name = "batchId", required = true) String batchId,
@RequestParam(name = "deviceNoStr", required = true) String deviceNoStr) {
DevopsParamsQo qo = new DevopsParamsQo();
qo.setDeviceNoStr(deviceNoStr);
List<DeviceDto> addList = getDeviceDtos(qo);
// TODO 调用前置
return ResultVoGenerator.genSuccessResultVo();
}
总结
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