{"id":208232,"date":"2025-07-08T17:40:25","date_gmt":"2025-07-08T09:40:25","guid":{"rendered":"https:\/\/server.hk\/cnblog\/208232\/"},"modified":"2025-07-08T17:40:25","modified_gmt":"2025-07-08T09:40:25","slug":"%e4%bc%98%e5%8c%96-go-%e4%b8%ad%e5%af%b9-csv-%e7%9a%84%e5%86%99%e5%85%a5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/208232\/","title":{"rendered":"\u4f18\u5316 Go \u4e2d\u5bf9 CSV \u7684\u5199\u5165"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u4f18\u5316 Go \u4e2d\u5bf9 CSV \u7684\u5199\u5165<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-30 16:00:39<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u6253\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\u300a\u4f18\u5316 Go \u4e2d\u5bf9 CSV \u7684\u5199\u5165\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\u5427\uff01\u6587\u4e2d\u5185\u5bb9\u5305\u542b<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9…\u5e0c\u671b\u4f60\u80fd\u5728\u9605\u8bfb\u672c\u6587\u540e\uff0c\u80fd\u771f\u771f\u5b9e\u5b9e\u5b66\u5230\u77e5\u8bc6\u6216\u8005\u5e2e\u4f60\u89e3\u51b3\u5fc3\u4e2d\u7684\u7591\u60d1\uff0c\u4e5f\u6b22\u8fce\u5927\u4f6c\u6216\u8005\u65b0\u4eba\u670b\u53cb\u4eec\u591a\u7559\u8a00\u8bc4\u8bba\uff0c\u591a\u7ed9\u5efa\u8bae\uff01\u8c22\u8c22\uff01<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u4ee5\u4e0b\u4ee3\u7801\u7247\u6bb5\u9a8c\u8bc1\u7535\u8bdd\u53f7\u7801\u5e76\u5c06\u8be6\u7ec6\u4fe1\u606f\u5199\u5165 csv\u3002 <\/p>\n

func Parse(phone Input, output *PhoneNumber) error {\n    var n PhoneNumber\n    num, _ := phonenumbers.Parse(phone.Number, phone.Prefix)\n    n.PhoneNumber = phonenumbers.Format(num, phonenumbers.E164)\n    n.CountryCode = num.GetCountryCode()\n    n.PhoneType = phonenumbers.GetNumberType(num)\n    n.NetworkName, _ = phonenumbers.GetCarrierForNumber(num, \"EN\")\n    n.Region = phonenumbers.GetRegionCodeForNumber(num)\n    *output = n\n    return nil\n}\n\nfunc createFile(path string) {\n    \/\/ detect if file exists\n    var _, err = os.Stat(path)\n\n    \/\/ create file if not exists\n    if os.IsNotExist(err) {\n        var file, err = os.Create(path)\n        if err != nil {\n            return\n        }\n        defer file.Close()\n    }\n}\n\nfunc worker(ctx context.Context, dst chan string, src chan []string) {\n    for {\n        select {\n        case dataArray, ok := <-src: \/\/ you must check for readable state of the channel.\n            if !ok {\n                return\n            }\n            go processNumber(dataArray[0])\n        case <-ctx.Done(): \/\/ if the context is cancelled, quit.\n            return\n        }\n    }\n}\n\nfunc processNumber(number string) {\n    num, e := phonenumbers.Parse(number, \"\")\n    if e != nil {\n        return\n    }\n    region := phonenumbers.GetRegionCodeForNumber(num)\n    carrier, _ := phonenumbers.GetCarrierForNumber(num, \"EN\")\n    path := \"sample_all.csv\"\n    createFile(path)\n    var csvFile, _ = os.OpenFile(path, os.O_APPEND|os.O_WRONLY, os.ModeAppend)\n    csvwriter := csv.NewWriter(csvFile)\n    _ = csvwriter.Write([]string{phonenumbers.Format(num, phonenumbers.E164), fmt.Sprintf(\"%v\", num.GetCountryCode()), fmt.Sprintf(\"%v\", phonenumbers.GetNumberType(num)), carrier, region})\n\n    defer csvFile.Close()\n\n    csvwriter.Flush()\n}\n\nfunc ParseFile(phone Input, output *PhoneNumber) error {\n\n    \/\/ create a context\n    ctx, cancel := context.WithCancel(context.Background())\n    defer cancel()\n    \/\/ that cancels at ctrl+C\n    go onSignal(os.Interrupt, cancel)\n\n    numberOfWorkers := 2\n\n    start := time.Now()\n\n    csvfile, err := os.Open(phone.File)\n    if err != nil {\n        log.Fatal(err)\n    }\n    defer csvfile.Close()\n\n    reader := csv.NewReader(csvfile)\n\n    \/\/ create the pair of input\/output channels for the controller=>workers com.\n    src := make(chan []string)\n    out := make(chan string)\n\n    \/\/ use a waitgroup to manage synchronization\n    var wg sync.WaitGroup\n\n    \/\/ declare the workers\n    for i := 0; i < numberOfWorkers; i++ {\n        wg.Add(1)\n        go func() {\n            defer wg.Done()\n            worker(ctx, out, src)\n        }()\n    }\n\n    \/\/ read the csv and write it to src\n    go func() {\n        for {\n            record, err := reader.Read()\n            if err == io.EOF {\n                break\n            } else if err != nil {\n                log.Fatal(err)\n            }\n            src <- record \/\/ you might select on ctx.Done().\n        }\n        close(src) \/\/ close src to signal workers that no more job are incoming.\n    }()\n\n    \/\/ wait for worker group to finish and close out\n    go func() {\n        wg.Wait()  \/\/ wait for writers to quit.\n        close(out) \/\/ when you close(out) it breaks the below loop.\n    }()\n\n    \/\/ drain the output\n    for res := range out {\n        fmt.Println(res)\n    }\n\n    fmt.Printf(\"\\n%2fs\", time.Since(start).Seconds())\n    return nil\n}<\/pre>\n
\u5728 processnumber \u51fd\u6570\u4e2d\uff0c\u5982\u679c\u6211\u8df3\u8fc7\u5199\u5165 csv\uff0c\u9a8c\u8bc1\u6570\u5b57\u7684\u8fc7\u7a0b\u4f1a\u5b8c\u6210 6 \u79d2\uff0c\u4f46\u5728 csv \u4e0a\u4e00\u6b21\u5199\u5165\u4e00\u6761\u8bb0\u5f55\u4f1a\u5c06\u65f6\u95f4\u6d88\u8017\u5ef6\u957f\u81f3 15 \u79d2\u3002<\/p>\n
\u5982\u4f55\u4f18\u5316\u4ee3\u7801\uff1f \u6211\u53ef\u4ee5\u5c06\u8bb0\u5f55\u5206\u5757\u5e76\u4ee5\u5757\u7684\u5f62\u5f0f\u5199\u5165\uff0c\u800c\u4e0d\u662f\u4e00\u6b21\u5199\u5165\u4e00\u884c\u5417\uff1f<\/p>\n
 <\/p>\n
\u89e3\u51b3\u65b9\u6848<\/h2>\n
 <\/p>\n
\u76f4\u63a5\u5728\u5de5\u4f5c\u534f\u7a0b\u4e2d\u5de5\u4f5c\uff0c\u800c\u4e0d\u662f\u4e3a\u6bcf\u4e2a\u4efb\u52a1\u89e6\u53d1\u534f\u7a0b\u3002<\/p>\n
\u6253\u5f00\u6587\u4ef6\u8f93\u51fa\u6587\u4ef6\u4e00\u6b21\u3002\u5237\u65b0\u8f93\u51fa\u6587\u4ef6\u4e00\u6b21\u3002<\/p>\n
func worker(ctx context.Context, dst chan []string, src chan []string) {\n    for {\n        select {\n        case dataArray, ok := <-src: \/\/ you must check for readable state of the channel.\n            if !ok {\n                return\n            }\n            dst <- processNumber(dataArray[0])\n        case <-ctx.Done(): \/\/ if the context is cancelled, quit.\n            return\n        }\n    }\n}\n\nfunc processNumber(number string) []string {\n    num, e := phonenumbers.Parse(number, \"\")\n    if e != nil {\n        return\n    }\n    region := phonenumbers.GetRegionCodeForNumber(num)\n    carrier, _ := phonenumbers.GetCarrierForNumber(num, \"EN\")\n    return []string{phonenumbers.Format(num, phonenumbers.E164), fmt.Sprintf(\"%v\", num.GetCountryCode()), fmt.Sprintf(\"%v\", phonenumbers.GetNumberType(num)), carrier, region}\n}\n\nfunc ParseFile(phone Input, output *PhoneNumber) error {\n\n    \/\/ create a context\n    ctx, cancel := context.WithCancel(context.Background())\n    defer cancel()\n    \/\/ that cancels at ctrl+C\n    go onSignal(os.Interrupt, cancel)\n\n    numberOfWorkers := 2\n\n    start := time.Now()\n\n    csvfile, err := os.Open(phone.File)\n    if err != nil {\n        log.Fatal(err)\n    }\n    defer csvfile.Close()\n\n    reader := csv.NewReader(csvfile)\n\n    \/\/ create the pair of input\/output channels for the controller=>workers com.\n    src := make(chan []string)\n    out := make(chan string)\n\n    \/\/ use a waitgroup to manage synchronization\n    var wg sync.WaitGroup\n\n    \/\/ declare the workers\n    for i := 0; i < numberOfWorkers; i++ {\n        wg.Add(1)\n        go func() {\n            defer wg.Done()\n            worker(ctx, out, src)\n        }()\n    }\n\n    \/\/ read the csv and write it to src\n    go func() {\n        for {\n            record, err := reader.Read()\n            if err == io.EOF {\n                break\n            } else if err != nil {\n                log.Fatal(err)\n            }\n            src <- record \/\/ you might select on ctx.Done().\n        }\n        close(src) \/\/ close src to signal workers that no more job are incoming.\n    }()\n\n    \/\/ wait for worker group to finish and close out\n    go func() {\n        wg.Wait()  \/\/ wait for writers to quit.\n        close(out) \/\/ when you close(out) it breaks the below loop.\n    }()\n\n    path := \"sample_all.csv\"\n\n    file, err := os.Create(path)\n    if err != nil {\n        return err\n    }\n    defer file.Close()\n    csvwriter := csv.NewWriter(csvFile)\n\n    \/\/ drain the output\n    for res := range out {\n        csvwriter.Write(res)\n    }\n    csvwriter.Flush()\n\n    fmt.Printf(\"\\n%2fs\", time.Since(start).Seconds())\n    return nil\n}<\/pre>\n
\u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8eGolang\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-208232","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208232","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=208232"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/208232\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=208232"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=208232"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=208232"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}