上传word文档

Question

我需要从用户上传的word文档中提取文本。我得到了code 来从我的 m/c 上的文档中提取单词。但我的要求是允许用户使用上传按钮上传自己的文档并阅读该文档（我不需要保存该文档）。你能建议我怎么做吗？我需要知道点击上传按钮后所有需要发生的事情。

Answer 1

当用户上传他们的文件时，获取关联的InputStream 并将其存储到一个变量中，例如inputStream。然后就拿示例代码，并替换这一行：

fs = new POIFSFileSystem(new FileInputStream(filesname));

...类似于：

fs = new POIFSFileSystem(inputStream); 

应该足够简单，假设您已经有一个Servlet 来处理上传。

编辑：

假设您使用commons-fileupload 解析上传，以下是 servlet 如何工作的基础知识：

public class UploadServlet extends HttpServlet {
    @Override
    public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
        // Create a factory for disk-based file items
        FileItemFactory factory = new DiskFileItemFactory();

        // Create a new file upload handler
        ServletFileUpload upload = new ServletFileUpload(factory);

        // Parse the request
        List<FileItem> items = upload.parseRequest(request);

        //this assumes that the uploaded file is the only thing submitted by the form
        //if not you need to iterate the list and find it
        FileItem wordFile = items.get(0);

        //get a stream that can be used to read the uploaded file
        InputStream inputStream = wordFile.getInputStream();

        //and the rest you already know...
    }
}