{"id":47591,"date":"2023-12-11T15:12:20","date_gmt":"2023-12-11T07:12:20","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=47591"},"modified":"2023-12-11T15:12:20","modified_gmt":"2023-12-11T07:12:20","slug":"hadoop%e7%9a%84textinputformat%e4%bd%9c%e7%94%a8%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%8c%e5%a6%82%e4%bd%95%e8%87%aa%e5%ae%9a%e4%b9%89%e5%ae%9e%e7%8e%b0%ef%bc%9f-4","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/12\/11\/hadoop%e7%9a%84textinputformat%e4%bd%9c%e7%94%a8%e6%98%af%e4%bb%80%e4%b9%88%ef%bc%8c%e5%a6%82%e4%bd%95%e8%87%aa%e5%ae%9a%e4%b9%89%e5%ae%9e%e7%8e%b0%ef%bc%9f-4\/","title":{"rendered":"hadoop\u7684TextInputFormat\u4f5c\u7528\u662f\u4ec0\u4e48\uff0c\u5982\u4f55\u81ea\u5b9a\u4e49\u5b9e\u73b0\uff1f"},"content":{"rendered":"<p>&#8220;`&#8221;<\/p>\n<p> InputFormat\u4f1a\u5728map\u64cd\u4f5c\u4e4b\u524d\u5bf9\u6570\u636e\u8fdb\u884c\u4e24\u65b9\u9762\u7684\u9884\u5904\u7406\u3002<br \/>\n 1\u662fgetSplits\uff0c\u8fd4\u56de\u7684\u662fInputSplit\u6570\u7ec4\uff0c\u5bf9\u6570\u636e\u8fdb\u884csplit\u5206\u7247\uff0c\u6bcf\u7247\u4ea4\u7ed9map\u64cd\u4f5c\u4e00\u6b21 \u3002<br \/>\n 2\u662fgetRecordReader\uff0c\u8fd4\u56de\u7684\u662fRecordReader\u5bf9\u8c61\uff0c\u5bf9\u6bcf\u4e2asplit\u5206\u7247\u8fdb\u884c\u8f6c\u6362\u4e3akey-value\u952e\u503c\u5bf9\u683c\u5f0f\u4f20\u9012\u7ed9map\u3002<br \/>\n \u5e38\u7528\u7684InputFormat\u662fTextInputFormat\uff0c\u4f7f\u7528\u7684\u662fLineRecordReader\u5bf9\u6bcf\u4e2a\u5206\u7247\u8fdb\u884c\u952e\u503c\u5bf9\u7684\u8f6c\u6362\uff0c\u4ee5\u884c\u504f\u79fb\u91cf\u4f5c\u4e3a\u952e\uff0c\u884c\u5185\u5bb9\u4f5c\u4e3a\u503c\u3002<br \/>\n \u81ea\u5b9a\u4e49\u7c7b\u7ee7\u627fInputFormat\u63a5\u53e3\uff0c\u91cd\u5199createRecordReader\u548cisSplitable\u65b9\u6cd5 \u3002<br \/>\n \u5728createRecordReader\u4e2d\u53ef\u4ee5\u81ea\u5b9a\u4e49\u5206\u9694\u7b26\u3002<\/p>\n<p>\u00a0<\/p>\n<p>&lt;pre&gt;&lt;code&gt;            &quot;&#8220;`<br \/>\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;`&#8221; InputFormat\u4f1a\u5728map\u64cd\u4f5c\u4e4b\u524d\u5bf9\u6570\u636e\u8fdb\u884c\u4e24\u65b9\u9762\u7684\u9884\u5904\u7406\u3002 1\u662fget [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-47591","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/47591","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=47591"}],"version-history":[{"count":1,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/47591\/revisions"}],"predecessor-version":[{"id":47592,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/47591\/revisions\/47592"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=47591"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=47591"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=47591"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}