element上传组件重名判断,下载

上传组件

本次调用不执行立即上传

<el-upload
    class="upload-demo"
    ref="fileUpload"
    action="${base}/survey/surveyConfirmFile/uploadFile"<!--必选参数,上传的地址-->
    :on-preview="downloadFileMethod"<!--点击文件列表中已上传的文件时的钩子-->
    :on-change="fileChange"<!--文件状态改变时的钩子,添加文件、上传成功和上传失败时都会被调用-->
    :before-upload="beforeUpload"<!--上传文件之前的钩子,参数为上传的文件,若返回 false 或者返回 Promise 且被 reject,则停止上传,会触发beforeRemove和handleRemove方法-->
    :auto-upload="false"<!--是否在选取文件后立即进行上传-->
    :on-remove="handleRemove"<!--文件列表移除文件时的钩子-->
    :on-success="handleSuccess"<!--文件上传成功时的钩子-->
    :on-exceed="handleExceed"<!--文件超出个数限制时的钩子-->
    :before-remove="beforeRemove"<!--删除文件之前的钩子,参数为上传的文件和文件列表,若返回 false 或者返回 Promise 且被 reject,则停止删除。-->
    multiple<!--是否支持多选文件-->
    :limit="3"<!--最大允许上传个数-->
    :file-list="fileList"<!--上传的文件列表, 例如: [{name: 'food.jpg', url: 'https://xxx.cdn.com/xxx.jpg'}]-->
    :data="uploadData"><!--	上传时附带的额外参数-->
    <el-button size="small" type="primary">上传附件</el-button>
</el-upload>

确定上传按钮

	shareSubmit(){
    
    
        this.$refs.fileUpload.submit();
    }

文件上传方法

//文件上传
 handleRemove(file, fileList) {
    
    
     let that=this
     if (file && file.status==="success") {
    
    //有可能是未上传过的文件
         //Todo 删除上传的文件
         get(that.getFileUrl,{
    
    filename:file.name,confirmid:that.shareForm.confirmId}, that).then(function (response) {
    
    
             for (let i = 0; i <response.data.data.length;i++) {
    
    
                 that.fileurl = response.data.data[i];
                 post(that.deleteFileUrl,that.fileurl , that).then(function (response) {
    
    
                 })
             }
         })
     }
     that.fileList = fileList;
 },
 handleSuccess(response,file, fileList){
    
    
     //this.fileList = fileList;
 },
 fileChange(file,fileList){
    
    
     this.fileList = fileList  
 },
 beforeUpload(file){
    
    
     this.uploadData.confirmIds = [];
     if(this.shareForm.confirmId != null && this.shareForm.confirmId !=''){
    
    
         this.uploadData.confirmIds.push(this.shareForm.confirmId);
     }
     if(this.fileList.length>0) {
    
    
         let repeatLength = 0
         for (let i = 0; i < this.fileList.length; i++) {
    
    
             if (this.fileList[i].name == file.name) {
    
    
                 repeatLength++
             }
         }
         if(repeatLength>=2){
    
    
             this.$message.error('文件重名');
             this.fileRepeat = true
             return false
         }
     }
 },
 beforeRemove(file, fileList) {
    
    
     if (file && file.status==="success") {
    
    //有可能是未上传过的文件
         return this.$confirm(`确定移除文件?`)
     }
 },
 handleExceed(files, fileList){
    
    
     if(fileList.length==3){
    
    
         this.$message.error('超出文件上传数量');
     }
 },
 downloadFileMethod(file){
    
    
     let that = this;
     event.preventDefault();
     let link = document.createElement('a')
     link.style.display = 'none'
     link.href = '${base}/'+file.url
     link.setAttribute('download', file.name)
     document.body.appendChild(link)
     link.click();
}

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转载自blog.csdn.net/weixin_39308542/article/details/102619067