Question

我必须索引PDF列表（PDF-A），其中一些没有问题，但对于其他人，当我查看索引内容时，我只会看到很多带有问号的钻石。< / p>

我认为问题是用于文档的字体，或者内容是＆＃34;封装的＆＃34;拍照。

有没有办法告诉tika只提取＆＃34;可读/可解析的＆＃34; pdf的文字？

当我查询所有文档（使用我的java应用程序）时，这是一个例子。我在日志文件中看到有问题的文件内容：

DEBUG org.apache.http.wire -  << " [\n]"> 
DEBUG org.apache.http.wire -  << "  [0xe8]?[0x1]d41d8cd98f00b204e9800998ecf8427e[0xb][0xa4][0xe5][0x81](Diverses[0xe6]=aabhpdtyan3vfsujquccemebqr4m3[0xe7][0x81]?[0xc1][0x4] [\n]"> 
DEBUG org.apache.http.wire -  << " [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << " E-Mail zur Archivierung [\n]"> 
DEBUG org.apache.http.wire -  << " [\n]"> 
DEBUG org.apache.http.wire -  << "    [\n]"> 
DEBUG org.apache.http.wire -  << " [0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0x9][0xef][0xbf][0xbd][\n]"> 
DEBUG org.apache.http.wire -  << "[0xef][0xbf][0xbd][0xef][0xbf][0xbd][0x9][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\r][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\r][\n]"> 
DEBUG org.apache.http.wire -  << " [\n]"> 
DEBUG org.apache.http.wire -  << " [0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\n]"> 
DEBUG org.apache.http.wire -  << " [\n]"> 
DEBUG org.apache.http.wire -  << " [0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\n]"> 
DEBUG org.apache.http.wire -  << "[0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\n]"> 
DEBUG org.apache.http.wire -  << " [\n]"> 
DEBUG org.apache.http.wire -  << " [0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0x9][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\n]"> 
DEBUG org.apache.http.wire -  << " [\n]"> 
DEBUG org.apache.http.wire -  << " [0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0x9][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\n]"> 
DEBUG org.apache.http.wire -  << "[0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\r][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\r][\n]"> 
DEBUG org.apache.http.wire -  << "[0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\n]"> 
DEBUG org.apache.http.wire -  << "[0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\n]"> 
DEBUG org.apache.http.wire -  << "[0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\r][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\r][\n]"> 
DEBUG org.apache.http.wire -  << "[0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\n]"> 
DEBUG org.apache.http.wire -  << " [\n]"> 
DEBUG org.apache.http.wire -  << " [0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][0xef][0xbf][0xbd][\n]"> 
DEBUG org.apache.http.wire -  << " [\n]"> 
DEBUG org.apache.http.wire -  << " [0xef][0xbf][0xbd] [\n]"> 
DEBUG org.apache.http.wire -  << "  [\n]"> 
DEBUG org.apache.http.wire -  << " [\n]"> 
DEBUG org.apache.http.wire -  << " [0x9] data1.pdf [\n]">

另一个问题是，对于内容字段开头的所有文件（也是＆＃34;好的＆＃34;），有一个很长的\n列表，您也可以在上面看到。怎么能避免这个？

这是我的schema.xml：

<?xml version="1.0" encoding="UTF-8" ?>
<schema name="simple" version="1.1">
    <types>
        <fieldtype name="string" class="solr.StrField" postingsFormat="SimpleText" />
        <fieldtype name="ignored" class="solr.TextField" />
        <fieldtype name="text" class="solr.TextField" postingsFormat="SimpleText">
            <analyzer>
                <charFilter class="solr.PatternReplaceCharFilterFactory" pattern="\n" replacement=""/>
                <tokenizer class="solr.StandardTokenizerFactory"/>
                <filter class="solr.LowerCaseFilterFactory" /> <!--Lowercases the letters in each token. Leaves non-letter tokens alone.-->
                <filter class="solr.ClassicFilterFactory" /> <!--Removes dots from acronyms and 's from the end of tokens. Works only on typed tokens produced by ClassicTokenizer or equivalent.-->
                <filter class="solr.TrimFilterFactory"/> <!--Trims whitespace at either end of a token. -->
                <filter class="solr.StopFilterFactory" ignoreCase="true"/> <!--Discards common words.  -->
                <filter class="solr.RemoveDuplicatesTokenFilterFactory"/>
            </analyzer>
        </fieldtype>
    </types>

    <fields>
        <field name="signatureField" type="string" indexed="true" stored="true" multiValued="false" />
        <dynamicField name="ignored_*" type="ignored" multiValued="true" indexed="false" stored="false" />
        <field name="id" type="string" indexed="true" stored="true" multiValued="false" />
        <field name="rmDocumentTitle" type="string" indexed="true" stored="true" multiValued="true"/>
        <field name="fullText" indexed="true" type="text" multiValued="true" />
    </fields>

    <defaultSearchField>fullText</defaultSearchField>

    <solrQueryParser defaultOperator="OR" />
    <uniqueKey>id</uniqueKey>
</schema>

和我的solrconfig.xml：

<?xml version="1.0" encoding="UTF-8" ?>
<config>
    <luceneMatchVersion>LUCENE_45</luceneMatchVersion>
    <directoryFactory name='DirectoryFactory' class='solr.MMapDirectoryFactory' />

    <codecFactory name="CodecFactory" class="solr.SchemaCodecFactory" />

    <lib dir='${solr.core.instanceDir}\lib' />
    <lib dir="${solr.core.instanceDir}\dist\" regex="solr-cell-\d.*\.jar" />
    <lib dir="${solr.core.instanceDir}\contrib\extraction\lib" regex=".*\.jar" />

    <requestHandler name="standard" class="solr.StandardRequestHandler" default="true" />

    <requestHandler name="/update" class="solr.UpdateRequestHandler">
        <lst name="defaults">
            <str name="update.chain">deduplication</str>
        </lst>
    </requestHandler>

    <requestHandler name="/update/extract" class="solr.extraction.ExtractingRequestHandler">
        <lst name="defaults">
            <str name="captureAttr">true</str>
            <str name="lowernames">false</str>
            <str name="overwrite">false</str>
            <str name="captureAttr">true</str>
            <str name="literalsOverride">true</str>
            <str name="uprefix">ignored_</str>
            <str name="fmap.a">link</str>
            <str name="fmap.content">fullText</str>
            <!-- the configuration here could be useful for tests -->
            <str name="update.chain">deduplication</str>
        </lst>
    </requestHandler>

    <updateRequestProcessorChain name="deduplication">
        <processor
            class="org.apache.solr.update.processor.SignatureUpdateProcessorFactory">
            <bool name="overwriteDupes">false</bool>
            <str name="signatureField">signatureField</str>
            <bool name="enabled">true</bool>
            <str name="fields">content</str>
            <str name="minTokenLen">10</str>
            <str name="quantRate">.2</str>
            <str name="signatureClass">solr.update.processor.TextProfileSignature</str>
        </processor>
        <processor class="solr.LogUpdateProcessorFactory" />
        <processor class="solr.RunUpdateProcessorFactory" />
    </updateRequestProcessorChain>

    <requestHandler name="/admin/"
        class="org.apache.solr.handler.admin.AdminHandlers" />

    <lockType>none</lockType>

    <admin>
        <defaultQuery>*:*</defaultQuery>
    </admin>

</config>

Answer 1

Re：Diamond with a question mark - 它是一个非UTF-8字符。见Why does a diamond with a questionmark in it � appear in my HTML?

尝试使用ASCIIFoldingFilterFactory并查看它是否适合您。

<强>更新

由于这不起作用，您可以尝试在分析器链中使用它来排除所有非ASCII字符（以SPACE开头）吗？

<charFilter class="solr.PatternReplaceCharFilterFactory" 
            pattern="([^\x20-\x7F])" 
            replacement=""/>

（见Regex any ascii character）

仅索引＆＃34;可读/可解析＆＃34;来自pdf的文字

1 个答案: