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google应用引擎中上传.docx文件，如链接中所述
文件上传servlet 。在上传时，我也想通过使用Apache POI库来提取文本。

如果我将此传递给POI API：

  InputStream stream = item.openStream（）; 
  

我得到以下异常：

 java.lang.IllegalArgumentException：您的InputStream既不是OLE2流也不是OOXML流
 $ b public static String docx2text（InputStream is）throws Exception {
返回ExtractorFactory.createExtractor（is）.getText（）; 
} 
  

我正在上传一个有效的.docx文档。 POI API工作正常，如果我传递FileInputStream对象。

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

解决方案

我不知道POI内部实现，但是我的猜测会是他们需要一个可寻求的流。通过servlet返回的流（和一般的网络连接）是不可搜索的。尝试读取整个内容，然后将其包装在 ByteArrayInputStream code>：



  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]; （（len = is.read（data，0，data.length））！= -1）{
 buffer.write（data，0，len）; 
 while 
} 
 
 buffer.flush（）; 
 return 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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