Tika AutoDetectParser返回空字符串？

Question

I'm attempting to use Tika's AutoDetectParser to pull a file's content. I originally thought this was a dependency issue but cannot fathom how that could still be true now that i'm including all of tika-app in my jar.

AutoDetect Parser returns emptry string here :

BodyContentHandler handler = new BodyContentHandler();  
AutoDetectParser parser = new AutoDetectParser();
Metadata metadata = new Metadata();
ParseContext context = new ParseContext();
FileInputStream mypdfstream = new FileInputStream(new File("mypdf.pdf"));
parser.parse(mypdfstream,handler,metadata,context);
System.out.println(handler.toString());

Further confusing me is the fact that using a standard PDFParser works fine...:

BodyContentHandler handler = new BodyContentHandler();
Metadata metadata = new Metadata();
ParseContext context = new ParseContext();
FileInputStream mypdfstream = new FileInputStream(new File("mypdf.pdf"));
PDFParser pdfparser = new PDFParser();
pdfparser.parse(mypdfstream,handler,metadata,context);
System.out.println(handler.toString());

I have included both the tika-app and tika-parsers jar on my classpath and included them within the jar created by ant.

relevant portions of build.xml

<javac srcdir="${src}" destdir="${build}">
                <classpath>
                        <pathelement path = "lib/tika-app-1.11.jar"/>
                        <pathelement path = "lib/tika-parsers-1.11.jar"/>
                </classpath>
 </javac>

<jar jarfile="${dist}/lib/MyProject-${DSTAMP}.jar" basedir="${build}">
        <zipgroupfileset dir="lib" includes="tika-app-1.11.jar"/>
        <zipgroupfileset dir="lib" includes="tika-parsers-1.11.jar"/>
</jar>

Edit: I looked at my list of supportedTypes with parser.getSupportTypes(context)) and it was empty. As is the list of parsers returned from parser.getParsers() .

So perhaps this is yet another dependency issue? This truly surprises me given tika-app is included.

Answer 1

I have the same issue, i have corrected adding the Tika Core and Parser dependency on my Pom.xml like this again and then Update Maven on Eclipse.

    <dependency>
      <groupId>org.apache.tika</groupId>
      <artifactId>tika-core</artifactId>
      <version>1.18</version>
    </dependency>
    <dependency>
      <groupId>org.apache.tika</groupId>
      <artifactId>tika-parsers</artifactId>
      <version>1.18</version>
    </dependency>