您的 InputStream 既不是 OLE2 流，也不是 OOXML 流 [英] Your InputStream was neither an OLE2 stream, nor an OOXML stream

问题描述

我正在使用 Apache Commons 在谷歌应用引擎中上传一个 .docx 文件，如本链接所述文件上传 servlet.上传时，我还想使用 Apache POI 库提取文本.

如果我将其传递给 POI API:

 InputStream stream = item.openStream();

我收到以下异常:

java.lang.IllegalArgumentException:您的 InputStream 既不是 OLE2 流，也不是 OOXML 流公共静态字符串 docx2text(InputStream is) 抛出异常 {返回 ExtractorFactory.createExtractor(is).getText();}

我正在上传有效的 .docx 文档.如果我传递 FileInputStream 对象，POI API 工作正常.

FileInputStream fs=new FileInputStream(new File("C:\\docs\\mydoc.docx"));

解决方案

我不知道 POI 的内部实现，但我的猜测是他们需要一个可查找的流.servlet(以及一般的网络)返回的流是不可查找的.

尝试读取整个内容，然后将其包装在 ByteArrayInputStream 中:

byte[] bytes = getBytes(item.openStream());InputStream stream = new ByteArrayInputStream(bytes);public static byte[] getBytes(InputStream is) 抛出 IOException {ByteArrayOutputStream 缓冲区 = new ByteArrayOutputStream();内里；字节[]数据=新字节[100000]；while ((len = is.read(data, 0, data.length)) != -1) {buffer.write(data, 0, len);}缓冲区.flush();返回 buffer.toByteArray();}

I am using Apache Commons to upload a .docx file in google app engine as explained in this link File upload servlet. While uploading, I also want to extract text by using Apache POI libraries.

If I pass this to the POI API:

 InputStream stream = item.openStream();

I get the below exception:

java.lang.IllegalArgumentException: Your InputStream was neither an OLE2 stream, nor an OOXML stream

public static String docx2text(InputStream is) throws Exception {
    return ExtractorFactory.createExtractor(is).getText();
}

I am uploading a valid .docx document. The POI API works fine if I pass a FileInputStream object.

FileInputStream fs=new FileInputStream(new File("C:\\docs\\mydoc.docx"));

解决方案

I don't know POI internal implementation, but my guess would be that they need a seekable stream. The streams returned by servlets (and networking in general) aren't seekable.

Try reading the whole contents and then wrapping it in ByteArrayInputStream:

byte[] bytes = getBytes(item.openStream());
InputStream stream = new ByteArrayInputStream(bytes);

public static byte[] getBytes(InputStream is) throws IOException {
    ByteArrayOutputStream buffer = new ByteArrayOutputStream();

    int len;
    byte[] data = new byte[100000];
    while ((len = is.read(data, 0, data.length)) != -1) {
    buffer.write(data, 0, len);
    }

    buffer.flush();
    return buffer.toByteArray();
}

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