圖片上傳主要代碼(學生系統個人信息中)
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步驟一:在web目錄下新建一個項目(圖片上傳的路徑)
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步驟二:導入commons-fileupload-1.32.jar和commons-io-2.5.jar
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步驟三:編寫jsp頁面(add.jsp)
<div class="form-group">
<label for="tel" class="col-sm-2 control-label">照片</label>
<div class="col-sm-5">
<input type="file" name="pic" class="form-control" id="pic" placeholder="照片">
</div>
</div>
- 步驟四:編寫servlet(StudentServlet.java)
@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
private Map<String, String> getParameterMap(HttpServletRequest req) {
DiskFileItemFactory diskFileItemFactory = new DiskFileItemFactory();
FileUpload fileUpload = new FileUpload(diskFileItemFactory);
Map<String,String> map = new HashMap<>();
try {
List<FileItem> list = fileUpload.parseRequest(req);
for (FileItem fileItem : list) {
if(fileItem.isFormField()){//判斷是否是 普通的表單項
map.put(fileItem.getFieldName(),fileItem.getString());
}else{//說明是 文件上傳的表單項,處理 上傳文件,將上傳文件 保存到服務器的硬盤中
//拼接路徑
String path = this.getServletContext().getRealPath("/")+"upload"+ File.separator;
String fileName = UUID.randomUUID().toString();
String suffix = fileItem.getName().substring(fileItem.getName().lastIndexOf('.'));
//TODO 驗證 大小、類型 等是否符合要求
File file = new File(path+fileName+suffix);
fileItem.write(file);
//將 路徑 存儲到 map ,以再便存到數據庫裏
map.put(fileItem.getFieldName(),"/upload/"+fileName+suffix);
}
}
} catch (FileUploadException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
return map;
}
}