我正在使用以下代码来获取上传的文件.
在调试时,我没有上传任何文件,它显示其长度为9,为什么它的9不为0.
@POST
@Path("update")
@Consumes(MediaType.WILDCARD)
public boolean updateWorkBookMaster(MultipartFormDataInput input) {
try {
//get form data
Map<String,List<InputPart>> uploadForm = input.getFormDataMap();
//get uploaded file
List<InputPart> inputParts = uploadForm.get("workBookFile");
MultivaluedMap<String,String> header = inputParts.get(0).getHeaders();
InputStream inputStream = inputParts.get(0).getBody(InputStream.class,null);
byte[] bytes = IoUtils.toByteArray(inputStream);
@H_404_4@现在我想检查这个byte []是否为空,在调试时,我没有上传任何文件,它显示其长度为9,为什么它的9不为0.
解决方法
您可以通过以下方式实现对文件的空检查：
import org.glassfish.jersey.media.multipart.ContentDisposition;
import org.glassfish.jersey.media.multipart.FormDataBodyPart;
import org.glassfish.jersey.media.multipart.FormDataMultiPart;
@POST
@Path("update")
@Consumes(MediaType.WILDCARD)
public boolean updateWorkBookMaster(FormDataMultiPart multiPartData) {
try {
final FormDataBodyPart workBookFilePart = multiPartData.getField("workBookFile");
final ContentDisposition workBookFileDetails = workBookFilePart.getContentDisposition();
final InputStream workBookFileDocument = workBookFilePart.getValueAs(InputStream.class);
if (workBookFileDetails.getFileName() != null ||
workBookFileDetails.getFileName().trim().length() > 0 ) {
// file is present
} else {
// file is not uploadded
}
} ... // other code
}
