{"id":514,"date":"2019-01-07T17:19:28","date_gmt":"2019-01-07T09:19:28","guid":{"rendered":"http:\/\/bj.iur.me\/?p=514"},"modified":"2022-11-06T20:14:09","modified_gmt":"2022-11-06T12:14:09","slug":"%e3%80%90%e8%bd%ac%e3%80%91utf8%e6%9c%80%e5%a5%bd%e4%b8%8d%e8%a6%81%e5%b8%a6bom%ef%bc%8c%e9%99%84%e8%ae%b8%e5%a4%9a%e7%bb%8f%e5%85%b8%e8%af%84%e8%ae%ba","status":"publish","type":"post","link":"https:\/\/www.iur.me\/?p=514","title":{"rendered":"\u3010\u8f6c\u3011UTF8\u6700\u597d\u4e0d\u8981\u5e26BOM\uff0c\u9644\u8bb8\u591a\u7ecf\u5178\u8bc4\u8bba"},"content":{"rendered":"\n<p>UTF8\u6700\u597d\u4e0d\u8981\u5e26BOM\uff0c\u9644\u8bb8\u591a\u7ecf\u5178\u8bc4\u8bba\n\nUTF-8 \u4e0d\u9700\u8981 BOM\uff0c\u5c3d\u7ba1 Unicode \u6807\u51c6\u5141\u8bb8\u5728 UTF-8 \u4e2d\u4f7f\u7528 BOM\u3002\n\u6240\u4ee5\u4e0d\u542b BOM \u7684 UTF-8 \u624d\u662f\u6807\u51c6\u5f62\u5f0f\uff0c\u5728 UTF-8 \u6587\u4ef6\u4e2d\u653e\u7f6e BOM \u4e3b\u8981\u662f\u5fae\u8f6f\u7684\u4e60\u60ef\uff08\u987a\u4fbf\u63d0\u4e00\u4e0b\uff1a\u628a\u5e26\u6709 BOM \u7684\u5c0f\u7aef\u5e8f UTF-16 \u79f0\u4f5c\u300cUnicode\u300d\u800c\u53c8\u4e0d\u8be6\u7ec6\u8bf4\u660e\uff0c\u8fd9\u4e5f\u662f\u5fae\u8f6f\u7684\u4e60\u60ef\uff09\u3002\nBOM\uff08byte order mark\uff09\u662f\u4e3a UTF-16 \u548c UTF-32 \u51c6\u5907\u7684\uff0c\u7528\u4e8e\u6807\u8bb0\u5b57\u8282\u5e8f\uff08byte order\uff09\u3002\u5fae\u8f6f\u5728 UTF-8 \u4e2d\u4f7f\u7528 BOM \u662f\u56e0\u4e3a\u8fd9\u6837\u53ef\u4ee5\u628a UTF-8 \u548c ASCII \u7b49\u7f16\u7801\u660e\u786e\u533a\u5206\u5f00\uff0c\u4f46\u8fd9\u6837\u7684\u6587\u4ef6\u5728 Windows \u4e4b\u5916\u7684\u64cd\u4f5c\u7cfb\u7edf\u91cc\u4f1a\u5e26\u6765\u95ee\u9898\u3002\n\n\u300cUTF-8\u300d\u548c\u300c\u5e26 BOM \u7684 UTF-8\u300d\u7684\u533a\u522b\u5c31\u662f\u6709\u6ca1\u6709 BOM\u3002\u5373\u6587\u4ef6\u5f00\u5934\u6709\u6ca1\u6709 U+FEFF\u3002\nUTF-8 \u7684\u7f51\u9875\u4ee3\u7801\u4e0d\u5e94\u4f7f\u7528 BOM\uff0c\u5426\u5219\u5e38\u5e38\u4f1a\u51fa\u9519\u3002\u8fd9\u662f\u4e00\u4e2a\u5c0f\u4f8b\u5b50\uff1a \u4e3a\u4ec0\u4e48\u8fd9\u4e2a\u7f51\u9875\u4ee3\u7801  \u5185\u7684\u4fe1\u606f\u4f1a\u88ab\u6d4f\u89c8\u5668\u7406\u89e3\u4e3a\u5728  \u5185\uff1f\n\n\u53e6\u9644\u300aThe Unicode Standard, Version 6.0\u300b\u4e4b 3.10 D95 UTF-8 encoding scheme \u7684\u4e00\u6bb5\u8bdd\uff1a\nWhile there is obviously no need for a byte order signature when using UTF-8, there are occasions when processes convert UTF-16 or UTF-32 data containing a byte order mark into UTF-8. When represented in UTF-8, the byte order mark turns into the byte sequence. Its usage at the beginning of a UTF-8 data stream is neither required nor recommended by the Unicode Standard, but its presence does not affect conformance to the UTF-8 encoding scheme. Identification of the byte sequence at the beginning of a data stream can, however, be taken as a near-certain indication that the data stream is using the UTF-8 encoding scheme.\nhttp:\/\/www.unicode.org\/versions\/Unicode6.0.0\/ch03.pdf\n\n\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\n\u9996\u5148\uff0cBOM\u662f\u5565\u3002\u8fd9\u4e2a\u5c31\u4e0d\u89e3\u91ca\u4e86\uff0cWikipedia\u4e0a\u5f88\u8be6\u7ec6\u3002http:\/\/en.wikipedia.org\/wiki\/Byte_order_mark\u3002\n\u5728\u7f51\u9875\u4e0a\u4f7f\u7528BOM\u662f\u4e2a\u9519\u8bef\u3002BOM\u8bbe\u8ba1\u51fa\u6765\u4e0d\u662f\u7528\u6765\u652f\u6301HTML\u548cXML\u7684\u3002\u8981\u8bc6\u522b\u6587\u672c\u7f16\u7801\uff0cHTML\u6709charset\u5c5e\u6027\uff0cXML\u6709encoding\u5c5e\u6027\uff0c\u6ca1\u5fc5\u8981\u62c9BOM\u6491\u573a\u9762\u3002\u867d\u7136\u7406\u8bba\u4e0aBOM\u53ef\u4ee5\u7528\u6765\u8bc6\u522bUTF-16\u7f16\u7801\u7684HTML\u9875\u9762\uff0c\u4f46\u5b9e\u9645\u5de5\u7a0b\u4e0a\u5f88\u5c11\u6709\u4eba\u8fd9\u4e48\u5e72\u3002\u6bd5\u7adfUTF-16\u8fd9\u79cd\u7f16\u7801\u8fdeASCII\u90fd\u53cc\u5b57\u8282\uff0c\u5b9e\u5728\u4e0d\u9002\u7528\u4e8e\u505a\u7f51\u9875\u3002\n\n\u5176\u5b9e\u8bf4BOM\u662f\u4e2a\u574f\u4e60\u60ef\u4e5f\u4e0d\u5c3d\u7136\u3002BOM\u4e5f\u662fUnicode\u6807\u51c6\u7684\u4e00\u90e8\u5206\uff0c\u6709\u5b83\u7279\u5b9a\u7684\u9002\u7528\u8303\u56f4\u3002\u901a\u5e38BOM\u662f\u7528\u6765\u6807\u793aUnicode\u7eaf\u6587\u672c\u5b57\u8282\u6d41\u7684\uff0c\u7528\u6765\u63d0\u4f9b\u4e00\u79cd\u65b9\u4fbf\u7684\u65b9\u6cd5\u8ba9\u6587\u672c\u5904\u7406\u7a0b\u5e8f\u8bc6\u522b\u8bfb\u5165\u7684.txt\u6587\u4ef6\u662f\u54ea\u4e2aUnicode\u7f16\u7801\uff08UTF-8\uff0cUTF-16BE\uff0cUTF-16LE\uff09\u3002Windows\u76f8\u5bf9\u5bf9BOM\u5904\u7406\u6bd4\u8f83\u597d\uff0c\u662f\u56e0\u4e3aWindows\u628aUnicode\u8bc6\u522b\u4ee3\u7801\u96c6\u6210\u8fdb\u4e86API\u91cc\uff0c\u4e3b\u8981\u662fCreateFile()\u3002\u6253\u5f00\u6587\u672c\u6587\u4ef6\u65f6\u5b83\u4f1a\u81ea\u52a8\u8bc6\u522b\u5e76\u5254\u9664BOM\u3002Windows\u7528\u8fd9\u4e2a\u6709\u5386\u53f2\u539f\u56e0\uff0c\u56e0\u4e3a\u5b83\u6700\u521d\u8131\u80ce\u4e8e\u591a\u4ee3\u7801\u9875\u7684\u73af\u5883\uff08ANSI\u73af\u5883\uff09\u3002\u800c\u5f15\u5165Unicode\u65f6Windows\u7684\u8bbe\u8ba1\u8005\u53c8\u5e0c\u671b\u80fd\u5728\u7528\u6237\u4e0d\u6ce8\u610f\u7684\u60c5\u51b5\u4e0b\u540c\u65f6\u517c\u5bb9Unicode\u548c\u975eUnicode\uff08Multiple 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# -*- coding: utf-8 -*-\uff0cPerl\u7684use utf8\uff0c\u90fd\u6bd4BOM\u7b80\u5355\u800c\u4e14\u53ef\u9760\u3002\u53e6\u4e00\u4e2a\u597d\u6d88\u606f\u662f\uff0c\u5373\u4f7f\u662f\u5fc5\u987b\u5728Windows\u548cUNIX\u4e4b\u95f4\u5207\u6362\u7684\u670b\u53cb\u4e5f\u4e0d\u4f1a\u60b2\u50ac\u3002\u5e78\u4e8f\u5728UNIX\u73af\u5883\u4e0b\u6211\u4eec\u8fd8\u6709VIM\u8fd9\u79cd\u795e\u5668\uff0c\u5373\u4f7f\u9047\u5230BOM\u6321\u9053\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u901a\u8fc7 set nobomb; set fileencoding=utf8; w \u4e09\u6761\u547d\u4ee4\u89e3\u51b3\u95ee\u9898\u3002\n\n\u6700\u540e\u56de\u5934\u60f3\u60f3\uff0c\u4f3c\u4e4e\u4e5f\u771f\u5c31\u53ea\u6709Windows\u575a\u6301\u7528BOM\u4e86\u3002\n\nP.S.\uff1a\u672c\u95ee\u9898\u662f\u81ea\u5df1\u7684\u7b2c150\u4e2a\u56de\u7b54\u3002\u7a81\u7136\u53d1\u73b0\u81ea\u5df1\u56de\u7b54\u5f97\u5f88\u5c11\u5f88\u5c11\u22ef\u22ef\nP.S. 2\uff1a\u7a81\u7136\u60f3\u8d77\u9700\u8981\u89e3\u91ca\u4e00\u4e0b\u4e3a\u4ec0\u4e48\u8bf4VIM\u53bb\u9664bomb\u7684\u64cd\u4f5c\u9700\u8981\u5728UNIX\u4e0b\u5b8c\u6210\u3002\u56e0\u4e3aVIM\u5728Windows\u73af\u5883\u4e0b\u6709\u4e00\u4e2a\u5947\u602a\u7684bug\uff0c\u603b\u662f\u628aUTF-16\u6587\u4ef6\u8bc6\u522b\u6210\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u800cUNIX\uff08Linux\u6216\u8005Mac\u90fd\u53ef\u4ee5\uff09\u4e0bVIM\u5219\u65e0\u95ee\u9898\u3002\u8fd9\u4e2a\u95ee\u9898\u4eceVIM 6.8\u4e00\u76f4\u8ddf\u7740\u6211\u5230VIM 7.3\u3002\u76ee\u524d\u5c1a\u4e0d\u6e05\u695a\u8fd9\u662fVIM\u7684bug\u8fd8\u662f\u6211\u81ea\u5df1\u90a3\u4e2a.vimrc\u6587\u4ef6\u7684bug\u3002\u5982\u6709\u9ad8\u624b\u89e3\u7b54\u4e0d\u80dc\u611f\u6fc0\u3002\n\n\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\u2014\n\n\u6709bom\u683c\u5f0f\u5728\u5f00\u5934\u4f1a\u591a\u51fa3\u4e2a\u5b57\u8282 EF BB BF 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