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liuxiaolong

2019-05-09 0d1d88cdb668e75ea8609417ac18ae19947e9525

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package framework.fileUpload;
 
import java.util.List;
 
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
 
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUpload;
import org.apache.commons.fileupload.FileUploadBase;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.springframework.web.multipart.MaxUploadSizeExceededException;
import org.springframework.web.multipart.MultipartException;
import org.springframework.web.multipart.MultipartHttpServletRequest;
import org.springframework.web.multipart.commons.CommonsMultipartResolver;
 
/**
 * 文件上传
 * 
 * @author liuyajun, 8384503@qq.com
 * @date 2016年1月19日
 * @time 下午4:34:06
 */
public class MyMultipartResolver extends CommonsMultipartResolver {
 
    private HttpServletRequest request;
 
    protected FileUpload newFileUpload(FileItemFactory fileItemFactory) {
        ServletFileUpload upload = new ServletFileUpload(fileItemFactory);
        upload.setSizeMax(-1);
        if (request != null) {
            HttpSession session = request.getSession();
            FileUploadProgressListener progressListener = 
                    new FileUploadProgressListener(session);
            upload.setProgressListener(progressListener);
        }
        return upload;
    }
 
    public MultipartHttpServletRequest resolveMultipart(
            HttpServletRequest request) throws MultipartException {
        // 获取到request,要用到session
        this.request = request;
        return super.resolveMultipart(request);
    }
 
    @Override
    public MultipartParsingResult parseRequest(
            HttpServletRequest request) throws MultipartException {
        HttpSession session = request.getSession();
        String encoding = determineEncoding(request);
        FileUpload fileUpload = prepareFileUpload(encoding);
        FileUploadProgressListener progressListener = 
                new FileUploadProgressListener(session);
        fileUpload.setProgressListener(progressListener);
        try {
 
            List<FileItem> fileItems = 
                    ((ServletFileUpload) fileUpload).parseRequest(request);
            return parseFileItems(fileItems, encoding);
        } catch (FileUploadBase.SizeLimitExceededException ex) {
            progressListener.tooMax(fileUpload.getSizeMax());
            throw new MaxUploadSizeExceededException(fileUpload.getSizeMax(), ex);
        } catch (FileUploadException ex) {
            throw new MultipartException("Could not parse multipart servlet request", ex);
        }
    }
}