临时上传文件的代码
周末，没什么事，晒晒一段关于上传文件的代码吧，项目中java实现把excel文件导入服务器端数据库，这样用到了，要把excel文件上传到服务器端，网上有的做法是把文件上传到某路径下，导入后再删除，没必这个必要的，下面代码就可以解决临时上传的功能，有需要的战友可以用一用，如果更好的解决方法，也请多指教啊！
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;


public class MutiFileTempUpload extends FileUploadBase {
private Map<String, FileItem> files;
private long filesSize = 0;


@SuppressWarnings("unchecked")
public Map<String, FileItem> parseRequest(HttpServletRequest request)
throws UnsupportedEncodingException {

files = new HashMap<String, FileItem>();

// Create a factory for disk-based file items

DiskFileItemFactory factory = new DiskFileItemFactory();

factory.setSizeThreshold(sizeThreshold);

if (repository != null)
factory.setRepository(repository);

ServletFileUpload upload = new ServletFileUpload(factory);

upload.setHeaderEncoding(encoding);

try {
List<FileItem> items = upload.parseRequest(request);

for (FileItem item : items) {
if (item.isFormField()) {
String fieldName = item.getFieldName();
String value = item.getString(encoding);
parameters.put(fieldName, value);
} else {

if (!super.isValidFile(item)) {
continue;
}
if(item.getSize()>0){
String fieldName = item.getFieldName();
files.put(fieldName, item);
filesSize += item.getSize();
}
}
}

} catch (FileUploadException e) {
//e.printStackTrace();
}
return files;
}
}