CommonsMultipartFile大小爲0

Question

我試着這個代碼和圖像存在，但是當我嘗試創建一個CommonsMultipartFile的大小爲零。

File file = new File("[image]"); 
DiskFileItem fileItem = new DiskFileItem("file", "image/png", false, file.getName(), (int) file.length() , file.getParentFile()); 
fileItem.getOutputStream(); 
MultipartFile multipartFile = new CommonsMultipartFile(fileItem); 

Answer 1

你可以用這個

DiskFileItem fileItem = new DiskFileItem("file", "image/png", true, file.getName(), (int)file.length() , file.getParentFile()); 
InputStream input = new FileInputStream(file); 
OutputStream os = fileItem.getOutputStream(); 
int ret = input.read(); 
while (ret != -1) 
{ 
    os.write(ret); 
    ret = input.read(); 
} 
os.flush(); 
MultipartFile multipartFile = new CommonsMultipartFile(fileItem); 
Assert.assertTrue(multipartFile.getSize() > 0);