{"id":44929,"date":"2023-02-03T18:52:47","date_gmt":"2022-12-10T01:30:55","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/44929-2\/"},"modified":"2024-04-29T12:58:57","modified_gmt":"2024-04-29T04:58:57","slug":"44929-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/44929-2\/","title":{"rendered":""},"content":{"rendered":"

\u306f\u3058\u3081\u306b<\/h2>\n

Golang\u306e\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002\u30d0\u30fc\u30b8\u30e7\u30f3\u306f1.11.2\u3067\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002<\/p>\n

os.File Read\u4f7f\u7528<\/h3>\n

os.Open\u3067\u30d5\u30a1\u30a4\u30eb\u306e\u30aa\u30fc\u30d7\u30f3\u3067\u53d6\u5f97\u3057\u305fos.File\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306eRead\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u8aad\u307f\u8fbc\u307f\u3092\u884c\u3044\u307e\u3059\u3002
\nRead\u30e1\u30bd\u30c3\u30c9\u306e\u5f15\u6570\u306b\u6307\u5b9a\u3057\u305f[]byte\u30b9\u30e9\u30a4\u30b9\u306b\u5185\u5bb9\u304c\u8aad\u307f\u8fbc\u307e\u308c\u307e\u3059\u3002<\/p>\n

func<\/span> useFileRead<\/span>(<\/span>fileName<\/span> string<\/span>)<\/span> {<\/span>\r\n    fp<\/span>,<\/span> err<\/span> :=<\/span> os<\/span>.<\/span>Open<\/span>(<\/span>fileName<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        panic<\/span>(<\/span>err<\/span>)<\/span>\r\n    }<\/span>\r\n    defer<\/span> fp<\/span>.<\/span>Close<\/span>()<\/span>\r\n\r\n    buf<\/span> :=<\/span> make<\/span>([]<\/span>byte<\/span>,<\/span> 64<\/span>)<\/span>\r\n    for<\/span> {<\/span>\r\n        n<\/span>,<\/span> err<\/span> :=<\/span> fp<\/span>.<\/span>Read<\/span>(<\/span>buf<\/span>)<\/span>\r\n        if<\/span> n<\/span> ==<\/span> 0<\/span> {<\/span>\r\n            break<\/span>\r\n        }<\/span>\r\n        if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n            panic<\/span>(<\/span>err<\/span>)<\/span>\r\n        }<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>string<\/span>(<\/span>buf<\/span>))<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
ioutil.ReadFile\u4f7f\u7528<\/h3>\n
ioutil.ReadFile\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002\u4e00\u5ea6\u306b\u5168\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u3059\u308b\u306e\u3067\u30d5\u30a1\u30a4\u30eb\u30b5\u30a4\u30ba\u304c\u5927\u304d\u3044\u5834\u5408\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u304c\u3001\u8a18\u8ff0\u91cf\u306f\u5c11\u306a\u304f\u3066\u6e08\u3080\u306e\u304c\u5229\u70b9\u3067\u3059\u3002<\/p>\n
func<\/span> useIoutilReadFile<\/span>(<\/span>fileName<\/span> string<\/span>)<\/span> {<\/span>\r\n    bytes<\/span>,<\/span> err<\/span> :=<\/span> ioutil<\/span>.<\/span>ReadFile<\/span>(<\/span>fileName<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        panic<\/span>(<\/span>err<\/span>)<\/span>\r\n    }<\/span>\r\n\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>string<\/span>(<\/span>bytes<\/span>))<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
bufio.NewReaderSize\u4f7f\u7528<\/h3>\n
bufio.NewReaderSize\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u30921\u884c\u3054\u3068\u8aad\u307f\u8fbc\u307f\u307e\u3059\u30021\u884c\u306e\u30b5\u30a4\u30ba\u304c\u7b2c\u4e8c\u5f15\u6570\u3067\u6307\u5b9a\u3057\u305f\u30b5\u30a4\u30ba\u3092\u8d85\u3048\u308b\u5834\u5408\u306b\u306f\u3001\u623b\u308a\u5024\u306eisPrefix\u306bfalse\u304c\u8fd4\u5374\u3055\u308c\u307e\u3059\u3002<\/p>\n
func<\/span> useBufioNewReaderSize<\/span>(<\/span>fileName<\/span> string<\/span>)<\/span> {<\/span>\r\n    fp<\/span>,<\/span> err<\/span> :=<\/span> os<\/span>.<\/span>Open<\/span>(<\/span>fileName<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        panic<\/span>(<\/span>err<\/span>)<\/span>\r\n    }<\/span>\r\n    defer<\/span> fp<\/span>.<\/span>Close<\/span>()<\/span>\r\n\r\n    reader<\/span> :=<\/span> bufio<\/span>.<\/span>NewReaderSize<\/span>(<\/span>fp<\/span>,<\/span> 64<\/span>)<\/span>\r\n    var<\/span> tmp<\/span> []<\/span>byte<\/span>\r\n    for<\/span> {<\/span>\r\n        line<\/span>,<\/span> isPrefix<\/span>,<\/span> err<\/span> :=<\/span> reader<\/span>.<\/span>ReadLine<\/span>()<\/span> \/\/ size \u3092\u8d85\u3048\u308b\u3068isPrefix\u304cfalse<\/span>\r\n        if<\/span> err<\/span> ==<\/span> io<\/span>.<\/span>EOF<\/span> {<\/span>\r\n            break<\/span>\r\n        }<\/span>\r\n        if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n            panic<\/span>(<\/span>err<\/span>)<\/span>\r\n        }<\/span>\r\n        tmp<\/span> =<\/span> append<\/span>(<\/span>tmp<\/span>,<\/span> line<\/span>...<\/span>)<\/span>\r\n        if<\/span> !<\/span>isPrefix<\/span> {<\/span>\r\n            fmt<\/span>.<\/span>Println<\/span>(<\/span>string<\/span>(<\/span>tmp<\/span>))<\/span>\r\n            tmp<\/span> =<\/span> nil<\/span>\r\n        }<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
bufio.NewScanner\u4f7f\u7528<\/h3>\n
bufio.NewScanner\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u30921\u884c\u3054\u3068\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002bufio.NewReaderSize\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\u3068\u6bd4\u3079\u3066\u30b7\u30f3\u30d7\u30eb\u306b\u66f8\u3051\u307e\u3059\u3002<\/p>\n
func<\/span> useBufioScanner<\/span>(<\/span>fileName<\/span> string<\/span>)<\/span> {<\/span>\r\n    fp<\/span>,<\/span> err<\/span> :=<\/span> os<\/span>.<\/span>Open<\/span>(<\/span>fileName<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        panic<\/span>(<\/span>err<\/span>)<\/span>\r\n    }<\/span>\r\n    defer<\/span> fp<\/span>.<\/span>Close<\/span>()<\/span>\r\n\r\n    scanner<\/span> :=<\/span> bufio<\/span>.<\/span>NewScanner<\/span>(<\/span>fp<\/span>)<\/span>\r\n    for<\/span> scanner<\/span>.<\/span>Scan<\/span>()<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>scanner<\/span>.<\/span>Text<\/span>())<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
csv.NewReader<\/h3>\n
csv.NewReader\u3092\u4f7f\u7528\u3057\u3066csv\u30d5\u30a1\u30a4\u30eb\u30921\u884c\u3054\u3068\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002csv.NewReader\u3092\u547c\u3076\u3068csv.Reader\u304c\u8fd4\u5374\u3055\u308c\u307e\u3059\u3002csv.Reader\u306eComma\u306b\u533a\u5207\u308a\u6587\u5b57\u3092\u6307\u5b9a\u3059\u308b\u3068\u6307\u5b9a\u3057\u305f\u6587\u5b57\u5217\u3067\u30c7\u30fc\u30bf\u3092\u5206\u5272\u3057\u307e\u3059\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u306f”,”\u3067\u3059\u3002csv.Reader\u306eReader\u30e1\u30bd\u30c3\u30c9\u3092\u547c\u3073\u51fa\u3059\u30681\u884c\u5206\u306e\u5206\u5272\u3055\u308c\u305f\u30c7\u30fc\u30bf\u304c\u30b9\u30e9\u30a4\u30b9\u3067\u8fd4\u5374\u3055\u308c\u307e\u3059\u3002<\/p>\n
func<\/span> userCsvNewReader<\/span>(<\/span>fileName<\/span> string<\/span>)<\/span> {<\/span>\r\n    fp<\/span>,<\/span> err<\/span> :=<\/span> os<\/span>.<\/span>Open<\/span>(<\/span>fileName<\/span>)<\/span>\r\n    if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n        panic<\/span>(<\/span>err<\/span>)<\/span>\r\n    }<\/span>\r\n    defer<\/span> fp<\/span>.<\/span>Close<\/span>()<\/span>\r\n\r\n    reader<\/span> :=<\/span> csv<\/span>.<\/span>NewReader<\/span>(<\/span>fp<\/span>)<\/span>\r\n    \/\/reader.Comma = ','<\/span>\r\n    reader<\/span>.<\/span>LazyQuotes<\/span> =<\/span> true<\/span>\r\n    for<\/span> {<\/span>\r\n        record<\/span>,<\/span> err<\/span> :=<\/span> reader<\/span>.<\/span>Read<\/span>()<\/span>\r\n        if<\/span> err<\/span> ==<\/span> io<\/span>.<\/span>EOF<\/span> {<\/span>\r\n            break<\/span>\r\n        }<\/span> else<\/span> if<\/span> err<\/span> !=<\/span> nil<\/span> {<\/span>\r\n            panic<\/span>(<\/span>err<\/span>)<\/span>\r\n        }<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>record<\/span>)<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u306f\u3058\u3081\u306b Golang\u306e\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002\u30d0\u30fc\u30b8\u30e7\u30f3\u306f1.11.2\u3067\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002 os.Fil […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44929","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/44929-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u306f\u3058\u3081\u306b Golang\u306e\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002\u30d0\u30fc\u30b8\u30e7\u30f3\u306f1.11.2\u3067\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002 os.Fil […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/44929-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2022-12-10T01:30:55+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-29T04:58:57+00:00\" \/>\n<meta name=\"author\" content=\"\u6587, \u7fd4\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6587, \u7fd4\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/44929-2\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/44929-2\/\",\"name\":\"- Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2022-12-10T01:30:55+00:00\",\"dateModified\":\"2024-04-29T04:58:57+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/64d5cc7727fffbff2f9a2a8da1de3e5c\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/44929-2\/\"]}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - 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Silicon Cloud","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.silicloud.com\/zh\/blog\/44929-2\/","og_locale":"zh_CN","og_type":"article","og_description":"\u306f\u3058\u3081\u306b Golang\u306e\u30d5\u30a1\u30a4\u30eb\u8aad\u307f\u8fbc\u307f\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002\u30d0\u30fc\u30b8\u30e7\u30f3\u306f1.11.2\u3067\u78ba\u8a8d\u3057\u307e\u3057\u305f\u3002 os.Fil […]","og_url":"https:\/\/www.silicloud.com\/zh\/blog\/44929-2\/","og_site_name":"Blog - Silicon Cloud","article_published_time":"2022-12-10T01:30:55+00:00","article_modified_time":"2024-04-29T04:58:57+00:00","author":"\u6587, \u7fd4","twitter_card":"summary_large_image","twitter_misc":{"\u4f5c\u8005":"\u6587, \u7fd4","\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4":"1 \u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.silicloud.com\/zh\/blog\/44929-2\/","url":"https:\/\/www.silicloud.com\/zh\/blog\/44929-2\/","name":"- Blog - 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