如何用Elasticsearch实现Word、PDF，TXT文件的全文内容检索？https://m.toutiaocdn.com/i7095369845738783236/?app=news_article&timestamp=1652048452&use_new_style=1&req_id=2022050906205201014106901316847AFB&group_id=7095369845738783236&tt_from=android_share&utm_medium=toutiao_android&utm_campaign=client_share&share_token=83ea5868-7efb-4488-95ae-911578f999ad

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