{"id":399,"date":"2023-03-23T07:18:19","date_gmt":"2023-03-23T07:18:19","guid":{"rendered":"https:\/\/yunshangtulv.com.cn\/?p=399"},"modified":"2023-03-23T07:18:19","modified_gmt":"2023-03-23T07:18:19","slug":"xml%e6%96%87%e4%bb%b6%e8%af%a6%e8%a7%a3%e5%8f%8a%e5%ba%94%e7%94%a8%e5%ae%9e%e4%be%8b","status":"publish","type":"post","link":"https:\/\/yunshangtulv.com.cn\/?p=399","title":{"rendered":"XML\u6587\u4ef6\u8be6\u89e3\u53ca\u5e94\u7528\u5b9e\u4f8b"},"content":{"rendered":"
\n
\n
\n
<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\n
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\n
<\/div>\n<\/div>\n
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R\u8bed\u8a00\u4e2d\u53ef\u4ee5\u4f7f\u7528XML<\/code>\u5305\u6765\u5904\u7406XML\u6587\u4ef6\u3002XML<\/code>\u5305\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u51fd\u6570\uff0c\u7528\u4e8e\u8bfb\u53d6\u3001\u89e3\u6790\u3001\u64cd\u4f5c\u548c\u5199\u5165XML\u6587\u4ef6\u3002\u9996\u5148\uff0c\u786e\u4fdd\u5df2\u7ecf\u5b89\u88c5\u4e86XML<\/code>\u5305\u3002\u5982\u679c\u6ca1\u6709\u5b89\u88c5\uff0c\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u8fdb\u884c\u5b89\u88c5\uff1a<\/p>\n

\n
<\/div>\n
install.packages(<\/span>\"XML\"<\/span>)<\/span>
\n<\/code><\/div>\n<\/div>\n

\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u901a\u8fc7\u4e00\u4e9b\u5e94\u7528\u5b9e\u4f8b\u6765\u8be6\u7ec6\u89e3\u91caR\u8bed\u8a00\u7684XML\u6587\u4ef6\u64cd\u4f5c\u3002<\/p>\n

    \n
  1. \u8bfb\u53d6\u548c\u89e3\u6790XML\u6587\u4ef6<\/li>\n<\/ol>\n

    \u5047\u8bbe\u6211\u4eec\u6709\u4ee5\u4e0bXML\u6587\u4ef6\uff08data.xml\uff09\uff1a<\/p>\n

    \n
    <\/div>\n
    <?xml version=\"1.0\"<\/span>?><\/span>
    \n<employees<\/span>><\/span>
    \n <employee<\/span>><\/span>
    \n <name<\/span>><\/span>John Doe<\/name<\/span>><\/span>
    \n <age<\/span>><\/span>30<\/age<\/span>><\/span>
    \n <position<\/span>><\/span>Software Engineer<\/position<\/span>><\/span>
    \n <\/employee<\/span>><\/span>
    \n <employee<\/span>><\/span>
    \n <name<\/span>><\/span>Jane Smith<\/name<\/span>><\/span>
    \n <age<\/span>><\/span>28<\/age<\/span>><\/span>
    \n <position<\/span>><\/span>Data Analyst<\/position<\/span>><\/span>
    \n <\/employee<\/span>><\/span>
    \n <employee<\/span>><\/span>
    \n <name<\/span>><\/span>Mike Brown<\/name<\/span>><\/span>
    \n <age<\/span>><\/span>35<\/age<\/span>><\/span>
    \n <position<\/span>><\/span>Project Manager<\/position<\/span>><\/span>
    \n <\/employee<\/span>><\/span>
    \n<\/employees<\/span>><\/span>
    \n<\/code><\/div>\n<\/div>\n

    \u9996\u5148\uff0c\u4f7f\u7528xmlParse<\/code>\u51fd\u6570\u8bfb\u53d6\u5e76\u89e3\u6790XML\u6587\u4ef6\uff1a<\/p>\n

    \n
    <\/div>\n
    library(<\/span>XML)<\/span><\/p>\n

    # \u8bfb\u53d6\u5e76\u89e3\u6790XML\u6587\u4ef6<\/span>
    \nxml_data <-<\/span> xmlParse(<\/span>\"data.xml\"<\/span>)<\/span>
    \n<\/code><\/div>\n<\/div>\n

      \n
    1. \u63d0\u53d6XML\u6587\u4ef6\u4e2d\u7684\u6570\u636e<\/li>\n<\/ol>\n

      \u5728\u89e3\u6790XML\u6587\u4ef6\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528xpathSApply<\/code>\u51fd\u6570\u6765\u63d0\u53d6\u6240\u9700\u7684\u6570\u636e\u3002\u4f8b\u5982\uff0c\u63d0\u53d6\u6240\u6709\u5458\u5de5\u7684\u59d3\u540d\uff1a<\/p>\n

      \n
      <\/div>\n
      # \u63d0\u53d6\u6240\u6709\u5458\u5de5\u7684\u59d3\u540d<\/span>
      \nnames<\/span> <-<\/span> xpathSApply(<\/span>xml_data,<\/span> \"\/\/name\"<\/span>,<\/span> xmlValue)<\/span><\/p>\n

      print(<\/span>names<\/span>)<\/span>
      \n<\/code><\/div>\n<\/div>\n

        \n
      1. \u64cd\u4f5cXML\u6587\u4ef6\u4e2d\u7684\u6570\u636e<\/li>\n<\/ol>\n

        \u4f7f\u7528XML<\/code>\u5305\u4e2d\u7684\u51fd\u6570\uff0c\u53ef\u4ee5\u5bf9XML\u6570\u636e\u8fdb\u884c\u64cd\u4f5c\uff0c\u5982\u6dfb\u52a0\u3001\u4fee\u6539\u6216\u5220\u9664\u8282\u70b9\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff0c\u5411XML\u6587\u4ef6\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684\u5458\u5de5\u8282\u70b9\uff1a<\/p>\n

        \n
        <\/div>\n
        # \u521b\u5efa\u65b0\u7684\u5458\u5de5\u8282\u70b9<\/span>
        \nnew_employee <-<\/span> newXMLNode(<\/span>\"employee\"<\/span>)<\/span>
        \nnewXMLNode(<\/span>\"name\"<\/span>,<\/span> \"Alice Johnson\"<\/span>,<\/span> parent =<\/span> new_employee)<\/span>
        \nnewXMLNode(<\/span>\"age\"<\/span>,<\/span> \"32\"<\/span>,<\/span> parent =<\/span> new_employee)<\/span>
        \nnewXMLNode(<\/span>\"position\"<\/span>,<\/span> \"HR Specialist\"<\/span>,<\/span> parent =<\/span> new_employee)<\/span><\/p>\n

        # \u5c06\u65b0\u8282\u70b9\u6dfb\u52a0\u5230XML\u6587\u4ef6<\/span>
        \nxmlRoot(<\/span>xml_data)<\/span> <-<\/span> addChildren(<\/span>xmlRoot(<\/span>xml_data)<\/span>,<\/span> new_employee)<\/span><\/p>\n

        # \u67e5\u770b\u66f4\u65b0\u540e\u7684XML\u6587\u4ef6<\/span>
        \ncat(<\/span>saveXML(<\/span>xml_data)<\/span>)<\/span>
        \n<\/code><\/div>\n<\/div>\n

          \n
        1. \u5c06\u4fee\u6539\u540e\u7684XML\u6570\u636e\u5199\u5165\u6587\u4ef6<\/li>\n<\/ol>\n

          \u6700\u540e\uff0c\u5c06\u4fee\u6539\u540e\u7684XML\u6570\u636e\u5199\u5165\u6587\u4ef6\u3002\u4f7f\u7528saveXML<\/code>\u51fd\u6570\u4fdd\u5b58XML\u6570\u636e\uff1a<\/p>\n

          \n
          <\/div>\n
          # \u5c06XML\u6570\u636e\u5199\u5165\u65b0\u6587\u4ef6<\/span>
          \nsaveXML(<\/span>xml_data,<\/span> \"updated_data.xml\"<\/span>)<\/span>
          \n<\/code><\/div>\n<\/div>\n

          \u901a\u8fc7\u4ee5\u4e0a\u793a\u4f8b\uff0c\u6211\u4eec\u4e86\u89e3\u4e86\u5982\u4f55\u5728R\u8bed\u8a00\u4e2d\u5904\u7406XML\u6587\u4ef6\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0cXML\u6587\u4ef6\u7684\u7ed3\u6784\u548c\u5185\u5bb9\u53ef\u80fd\u66f4\u4e3a\u590d\u6742\uff0c\u4f46\u57fa\u672c\u7684\u8bfb\u53d6\u3001\u89e3\u6790\u3001\u64cd\u4f5c\u548c\u5199\u5165\u65b9\u6cd5\u662f\u76f8\u4f3c\u7684\u3002\u66f4\u591a\u5173\u4e8eXML<\/code>\u5305\u7684\u4fe1\u606f\uff0c\u53ef\u4ee5\u67e5\u9605\u76f8\u5173\u6587\u6863\u6216\u8bbf\u95ee\u4ee5\u4e0b\u94fe\u63a5\uff1a<\/p>\n