原文地址:
http://www.haorooms.com/post/input_file_leixing
一、input:file屬性
屬性值有以下幾個比較常用:
accept:表示可以選擇的文件MIME類型,多個MIME類型用英文逗號分開,常用的MIME類型見下表。
multiple:是否可以選擇多個文件,多個文件時其value值爲第一個文件的虛擬路徑。
1、accept
只能選擇png和gif圖片
<input id="fileId1" type="file" accept="image/png,image/gif" name="file" />
2、multiple
多文件上傳
<input id="fileId2" type="file" multiple="multiple" name="file" />
3、常用MIME類型
後綴名 MIME名稱
*.3gpp audio/3gpp, video/3gpp
*.ac3 audio/ac3
*.asf allpication/vnd.ms-asf
*.au audio/basic
*.css text/css
*.csv text/csv
*.doc application/msword
*.dot application/msword
*.dtd application/xml-dtd
*.dwg image/vnd.dwg
*.dxf image/vnd.dxf
*.gif image/gif
*.htm text/html
*.html text/html
*.jp2 image/jp2
*.jpe image/jpeg
*.jpeg image/jpeg
*.jpg image/jpeg
*.js text/javascript, application/javascript
*.json application/json
*.mp2 audio/mpeg, video/mpeg
*.mp3 audio/mpeg
*.mp4 audio/mp4, video/mp4
*.mpeg video/mpeg
*.mpg video/mpeg
*.mpp application/vnd.ms-project
*.ogg application/ogg, audio/ogg
*.pdf application/pdf
*.png image/png
*.pot application/vnd.ms-powerpoint
*.pps application/vnd.ms-powerpoint
*.ppt application/vnd.ms-powerpoint
*.rtf application/rtf, text/rtf
*.svf image/vnd.svf
*.tif image/tiff
*.tiff image/tiff
*.txt text/plain
*.wdb application/vnd.ms-works
*.wps application/vnd.ms-works
*.xhtml application/xhtml+xml
*.xlc application/vnd.ms-excel
*.xlm application/vnd.ms-excel
*.xls application/vnd.ms-excel
*.xlt application/vnd.ms-excel
*.xlw application/vnd.ms-excel
*.xml text/xml, application/xml
*.zip aplication/zip
*.xlsx application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
二、樣式美化
請看博客:css input[type=file] 樣式美化,input上傳按鈕美化 http://www.haorooms.com/post/css_input_uploadmh
三、AJAX上傳文件
在說到ajax上傳文件。ajax上傳的時候,需要獲得input:file選擇的文件(可能爲多個文件),獲取其文件列表爲:
// input標籤的files屬性
document.querySelector("#fileId").files
// 返回的是一個文件列表數組
獲得的文件列表,然後遍歷插入到表單數據當中。即:
// 獲得上傳文件DOM對象
var oFiles = document.querySelector("#fileId");
// 實例化一個表單數據對象
var formData = new FormData();
// 遍歷圖片文件列表,插入到表單數據中
for (var i = 0, file; file = oFiles[i]; i++) {
// 文件名稱,文件對象
formData.append(file.name, file);
}
獲得表單數據之後,就可以用ajax的POST上傳。
// 實例化一個AJAX對象
var xhr = new XMLHttpRequest();
xhr.onload = function() {
alert("上傳成功!");
}
xhr.open("POST", "upload.php", true);
// 發送表單數據
xhr.send(formData);
上傳到服務器之後,獲取到文件列表爲:
Array
(
[jpg_jpg] => Array
(
[name] => jpg.jpg
[type] => image/jpeg
[tmp_name] => D:\xampp\tmp\phpA595.tmp
[error] => 0
[size] => 133363
)
[png_png] => Array
(
[name] => png.png
[type] => image/png
[tmp_name] => D:\xampp\tmp\phpA5A6.tmp
[error] => 0
[size] => 1214628
)
)
在服務端循環遍歷這個數組就可以上傳文件了。