如何使用 ElasticSearch 获取 PDF 中文本的确切位置？

如何解决如何使用 ElasticSearch 获取 PDF 中文本的确切位置？

我正在构建一个应用程序，该应用程序需要具有允许用户在 pdf 中搜索相似内容的功能（可能使用 ElasticSearch）...因为我确实编写了一些代码来找出如何使用 ElasticSearch 找到那个确切的 pdf 文件但我不知道如何获取文本的确切位置...或者如何突出显示搜索结果？如果提供代码示例会很有帮助>_

解决方法

您可以使用 highlighting，其中高亮器使您能够从搜索结果中的一个或多个字段中获取突出显示的片段，以便向用户显示查询匹配的位置。

添加包含索引数据、搜索查询和搜索结果的工作示例

索引数据：

{
  "content": "The nonprofit Wikimedia Foundation provides the essential infrastructure for free knowledge. We host Wikipedia,the free online encyclopedia,created,edited,and verified by volunteers around the world,as well as many other vital community projects. All of which is made possible thanks to donations from individuals like you. We welcome anyone who shares our vision to join us in collecting and sharing knowledge that fully represents human diversity."
}

搜索查询：

{
  "query": {
    "match": {
      "content": "online"
    }
  },"highlight": {
    "fields": {
      "content": {}
    }
  }
}

搜索结果：

"hits": [
      {
        "_index": "65463291","_type": "_doc","_id": "1","_score": 0.2876821,"_source": {
          "content": "The nonprofit Wikimedia Foundation provides the essential infrastructure for free knowledge. We host Wikipedia,as well as many other vital community projects. All of which is made possible thanks to donations from individuals like you. We welcome anyone who shares our vision to join us in collecting and sharing knowledge that fully represents human diversity."
        },"highlight": {                      // note this
          "content": [
            "We host Wikipedia,the free <em>online</em> encyclopedia,and verified by volunteers around the"
          ]
        }
      }
    ]