Question

public void execute(HttpServletRequest request) throws Exception {
    DiskFileItemFactory factory = new DiskFileItemFactory();

    factory.setSizeThreshold(1*1024*1024*1024); //1 MB
    /*
     * Set the temporary directory to store the uploaded files of size above threshold.
     */
    factory.setRepository(new File("c:\\temp"));

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

    // Parse the request
    List items = upload.parseRequest(request);
    Iterator iter = items.iterator();

    while (iter.hasNext()) {
        FileItem item = (FileItem) iter.next();
        if (item.isFormField()) {
            InputStream uploadedStream = item.getInputStream();
            try {
                File f = new File("C:\\temp\\index.jpg");
                item.write(f);
                uploadedStream.close();
            } 
            catch (IOException e) {
            }
        }
    }

html表单：

<form enctype="multipart/form-data" method="POST" action="<%=request.getContextPath ()%>/main?cmd=ci">
    <table class = "lineable">
        <tr>
            <td><input type="file" name="file1"/></td>
            <td><input type="submit" name="q" value="import"/></td>
        </tr>
    </table>
</form>

当我在其中保存时创建index.jpg但在jpg文件中写入“import”字，其中提交按钮的值。怎么了。感谢。

Answer 1

这里至少有一个问题：

if(item.isFormField()){
    InputStream uploadedStream = item.getInputStream();
    ...
}

如果您正在查看表单字段，为什么要查看其InputStream？您应该只对非表单字段项目感兴趣，即文件。

第二次检查时，您正在使用Commons IO，甚至不需要查看其InputStream。只是否定支票，你会没事的。

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1 个答案: