java web檔案上傳與下載
阿新 • • 發佈：2018-11-05
jsp程式碼（檔案上傳）
-
<form id="upLoad" method="post">
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<input type="file" id="yaFile" name="file">
<br/>
-
<input
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</form>
js程式碼：這裡我選擇的是非同步提交
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$("#fileSubmit").click(function(){
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var formData = new FormData();
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formData.append("file", document.getElementById("upLoad").files[0]);
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$.ajax({
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cache: true,
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type: "POST",
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url:'路徑',
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data:formData,
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processData: false,
//禁止jquery對DAta資料的處理,預設會處理
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contentType: false,
//禁止設定請求型別
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async: false,
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error: function(request) {
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alert("上傳失敗");
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},
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success: function(data) {
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if(data==0){
alert("上傳成功");
java程式碼：檔案上傳
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/**
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* 檔案上傳功能
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* @param file
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* @return
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* @throws IOException
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*/
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@RequestMapping(
"/upload")
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@ResponseBody
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public String upload(MultipartFile file,String faUrl,HttpServletRequest request) throws IOException{
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String path = request.getSession().getServletContext().getRealPath(
"upload");
//檔案上傳路徑
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String fileName = file.getOriginalFilename();
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File dir =
new File(path ,fileName);
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if(!dir.exists()){
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dir.mkdirs();
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}
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//MultipartFile自帶的解析方法
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file.transferTo(dir);
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return
"0";
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}
js程式碼：檔案下載
- function onClick() {
- var url ="路徑"
- document.location.href=url;
- }
java程式碼：檔案下載
-
/**
-
* 檔案下載功能
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* @param request
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* @param response
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* @throws Exception
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*/
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@RequestMapping(
"/fileDown")
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@ResponseBody
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public void fileDown(HttpServletRequest request,HttpServletResponse response){
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//通過檔名找出檔案的所在目錄
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String path = request.getSession().getServletContext().getRealPath(
"upload");
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ServletOutputStream out;
-
//得到要下載的檔案
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File file =
new File(path);
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try {
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//設定響應頭，控制瀏覽器下載該檔案
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response.setContentType(
"multipart/form-data");
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//獲得瀏覽器資訊,並處理檔名
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String headerType=request.getHeader(
"User-Agent").toUpperCase();
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String fileName =
null;
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if (headerType.indexOf(
"EDGE") >
0||headerType.indexOf(
"MSIE")>
0||headerType.indexOf(
"GECKO")>
0) {
-
fileName=URLEncoder.encode(file.getName(),
"UTF-8");
-
}
else{
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fileName=
new String(file.getName().replaceAll(
" ",
"").getBytes(
"utf-8"),
"iso8859-1");
-
}
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response.addHeader(
"Content-Disposition",
"attachment;filename="+fileName);
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response.addHeader(
"Content-Length",
"" + file.length());
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FileInputStream inputStream =
new FileInputStream(file);
-
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out = response.getOutputStream();
-
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int b =
0;
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byte[] buffer =
new
byte[
1024];
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while (b != -
1) {
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b = inputStream.read(buffer);
-
//寫到輸出流(out)中
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if(b!=-
1)
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out.write(buffer,
0, b);
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}
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inputStream.close();
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out.close();
//關閉輸出流
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out.flush();
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}
catch (IOException e) {
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e.printStackTrace();
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}
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}