webservice分段上传文件

webservice定义： <xsd:element name="attachmentPartBytes" type="xsd:base64Binary"/>

private void attachmentPartUpload(File file, String fileName,
            String businessId, String attrId,String fileSecurityVal) throws Exception {
        byte[] bytes = null;
        long maxSize = 1024 * 1024 * 2;
        long length = file.length();

        InputStream is = new FileInputStream(file);
        long offset = 0;
        long endIndex = 0;
        int i = 0;
        while (endIndex < length) {
            offset = i * maxSize;
            endIndex = (i + 1) * maxSize;
            if (endIndex > length) {
                endIndex = length;
            }
            int byteLen = (int) (endIndex - offset);
            bytes = new byte[byteLen];
            is.read(bytes, 0, byteLen);

            AttachmentPartUploadRequest request = new AttachmentPartUploadRequest();
            AttachmentPart attachmentPart = new AttachmentPart();
            attachmentPart.setAttachmentName(fileName);
            attachmentPart.setBusinessId(businessId);
            attachmentPart.setAttrId(attrId);
            attachmentPart.setAttachmentPartBytes(bytes);
            attachmentPart.setOffset(offset);
            attachmentPart.setIsLastPart(endIndex < length ? 0 : 1); // endIndex < length 代表上传未结束
            attachmentPart.setFileSecurityVal(fileSecurityVal);
            request.setAttachmentPart(attachmentPart);
            attachmentService.attachmentPartUpload(request);
            i++;
        }
    }

attachmentPartUpload