{"id":205842,"date":"2025-06-12T10:32:19","date_gmt":"2025-06-12T02:32:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205842\/"},"modified":"2025-06-12T10:32:19","modified_gmt":"2025-06-12T02:32:19","slug":"golang-%e5%87%bd%e6%95%b0%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86%e6%9c%ba%e5%88%b6%e7%ae%80%e4%bb%8b%e5%8f%8a%e6%9c%80%e4%bd%b3%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205842\/","title":{"rendered":"Golang \u51fd\u6570\u5f02\u5e38\u5904\u7406\u673a\u5236\u7b80\u4ecb\u53ca\u6700\u4f73\u5b9e\u8df5"},"content":{"rendered":"

\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765
\n\u300aGOLANG \u51fd\u6570\u5f02\u5e38\u5904\u7406\u673a\u5236\u7b80\u4ecb\u53ca\u6700\u4f73\u5b9e\u8df5\u300b<\/span>\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230
\n<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60
\nGOLANG<\/span>\uff0c\u6216\u8005\u662f\u5bf9
\nGOLANG<\/span>\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01,Go \u8bed\u8a00\u4e2d\u5f02\u5e38\u5904\u7406\u901a\u8fc7 error \u7c7b\u578b\u8fdb\u884c\uff0c\u9519\u8bef\u5904\u7406\u7684\u6700\u4f73\u5b9e\u8df5\u5305\u62ec\uff1a\u4f7f\u7528\u9519\u8bef\u503c\u8fdb\u884c\u9519\u8bef\u5904\u7406\u3002\u4f7f\u7528 defer \u8bed\u53e5\u6e05\u7406\u8d44\u6e90\u3002\u4f7f\u7528 recover() \u51fd\u6570\u6355\u83b7 panic\u3002,
\n,
\nGo \u8bed\u8a00\u51fd\u6570\u5f02\u5e38\u5904\u7406\u673a\u5236\u7b80\u4ecb\u53ca\u6700\u4f73\u5b9e\u8df5<\/strong>,\u5728 Go \u8bed\u8a00\u4e2d\uff0c\u9519\u8bef\u5904\u7406\u662f\u901a\u8fc7
\nerror<\/code> \u7c7b\u578b\u8fdb\u884c\u7684\u3002
\nerror<\/code> \u7c7b\u578b\u662f\u4e00\u4e2a\u5185\u7f6e\u63a5\u53e3\uff0c\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3a
\nError()<\/code> \u7684\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u8868\u793a\u9519\u8bef\u7684\u5b57\u7b26\u4e32\u3002,
\n\u5f02\u5e38\u5904\u7406\u673a\u5236<\/strong>,Go \u8bed\u8a00\u4e2d\u5f02\u5e38\u5904\u7406\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a,\u5728\u8fd9\u4e2a\u8bed\u6cd5\u4e2d\uff1a,\u5982\u679c\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u975e\u7a7a\u7684\u9519\u8bef\u503c\uff0c\u5219\u51fd\u6570\u8c03\u7528\u5c06\u5f15\u53d1 panic\u3002panic \u4f1a\u5bfc\u81f4\u7a0b\u5e8f\u7ec8\u6b62\uff0c\u9664\u975e\u88ab
\nrecover()<\/code> \u51fd\u6570\u6355\u83b7\u3002,
\n\u6700\u4f73\u5b9e\u8df5<\/strong>,\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\u5305\u62ec\uff1a,
\n\u5b9e\u6218\u6848\u4f8b<\/strong>,\u4ee5\u4e0b\u662f\u4e00\u4e2a\u6253\u5f00\u6587\u4ef6\u7684\u51fd\u6570\uff0c\u6f14\u793a\u9519\u8bef\u5904\u7406\uff1a,\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff1a,\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300aGOLANG \u51fd\u6570\u5f02\u5e38\u5904\u7406\u673a\u5236\u7b80\u4ecb\u53ca\u6700\u4f73\u5b9e\u8df5\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8egolang,\u5f02\u5e38\u5904\u7406\u7684\u77e5\u8bc6\u70b9\uff01,
\n\u4f7f\u7528 recover()<\/code> \u51fd\u6570\u6355\u83b7 panic\uff1a<\/strong>\u4f7f\u7528
\nrecover()<\/code> \u51fd\u6570\u6355\u83b7 panic \u5e76\u91c7\u53d6\u9002\u5f53\u7684\u63aa\u65bd\uff0c\u4f8b\u5982\u8bb0\u5f55\u9519\u8bef\u6216\u8fd4\u56de\u9519\u8bef\u3002,
\n\u4f7f\u7528 defer<\/code> \u8bed\u53e5\u6e05\u7406\u8d44\u6e90\uff1a<\/strong>\u4f7f\u7528
\ndefer<\/code> \u8bed\u53e5\u6765\u786e\u4fdd\u5728\u51fa\u73b0\u5f02\u5e38\u65f6\uff0c\u65e0\u8bba\u51fd\u6570\u662f\u5426\u6210\u529f\u6267\u884c\uff0c\u90fd\u4f1a\u91ca\u653e\u8d44\u6e90\u3002,
\n\u4f7f\u7528\u9519\u8bef\u503c\u8fdb\u884c\u9519\u8bef\u5904\u7406\uff1a<\/strong>\u5728\u51fd\u6570\u4e2d\u4f7f\u7528
\nerror<\/code> \u7c7b\u578b\u6765\u8868\u793a\u9519\u8bef\uff0c\u5e76\u8fd4\u56de\u8be5
\nerror<\/code> \u503c\u3002,
\nresultType<\/code> \u662f\u51fd\u6570\u8fd4\u56de\u7684\u7c7b\u578b\uff08\u5982\u679c\u51fd\u6570\u4e0d\u8fd4\u56de\u9519\u8bef\uff0c\u5219\u4e3a
\nerror<\/code> \u7c7b\u578b\uff09,
\nfunction<\/code> \u662f\u51fd\u6570\u540d\u79f0,
\nerror<\/code> \u662f\u8fd4\u56de\u9519\u8bef\u7c7b\u578b\u7684\u53d8\u91cf\u540d,\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765
\n\u300aGOLANG \u51fd\u6570\u5f02\u5e38\u5904\u7406\u673a\u5236\u7b80\u4ecb\u53ca\u6700\u4f73\u5b9e\u8df5\u300b<\/span>\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230
\n<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60
\nGOLANG<\/span>\uff0c\u6216\u8005\u662f\u5bf9
\nGOLANG<\/span>\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01,
\n<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> GOLANG \u51fd\u6570\u5f02\u5e38\u5904\u7406\u673a\u5236\u7b80\u4ecb\u53ca\u6700\u4f73\u5b9e\u8df5<\/span><\/p>\n

GOLANG \u51fd\u6570\u5f02\u5e38\u5904\u7406\u673a\u5236\u7b80\u4ecb\u53ca\u6700\u4f73\u5b9e\u8df5<\/h1>\n

2024-10-27 15:54:05<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765\u300aGOLANG \u51fd\u6570\u5f02\u5e38\u5904\u7406\u673a\u5236\u7b80\u4ecb\u53ca\u6700\u4f73\u5b9e\u8df5\u300b<\/span>\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60GOLANG<\/span>\uff0c\u6216\u8005\u662f\u5bf9GOLANG<\/span>\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01<\/p>\n

Go \u8bed\u8a00\u4e2d\u5f02\u5e38\u5904\u7406\u901a\u8fc7 error \u7c7b\u578b\u8fdb\u884c\uff0c\u9519\u8bef\u5904\u7406\u7684\u6700\u4f73\u5b9e\u8df5\u5305\u62ec\uff1a\u4f7f\u7528\u9519\u8bef\u503c\u8fdb\u884c\u9519\u8bef\u5904\u7406\u3002\u4f7f\u7528 defer \u8bed\u53e5\u6e05\u7406\u8d44\u6e90\u3002\u4f7f\u7528 recover() \u51fd\u6570\u6355\u83b7 panic\u3002<\/p>\n

<\/p>\n

Go \u8bed\u8a00\u51fd\u6570\u5f02\u5e38\u5904\u7406\u673a\u5236\u7b80\u4ecb\u53ca\u6700\u4f73\u5b9e\u8df5<\/strong><\/p>\n

\u5728 Go \u8bed\u8a00\u4e2d\uff0c\u9519\u8bef\u5904\u7406\u662f\u901a\u8fc7 error<\/code> \u7c7b\u578b\u8fdb\u884c\u7684\u3002error<\/code> \u7c7b\u578b\u662f\u4e00\u4e2a\u5185\u7f6e\u63a5\u53e3\uff0c\u5b9a\u4e49\u4e86\u4e00\u4e2a\u540d\u4e3a Error()<\/code> \u7684\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u8868\u793a\u9519\u8bef\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n

\u5f02\u5e38\u5904\u7406\u673a\u5236<\/strong><\/p>\n

Go \u8bed\u8a00\u4e2d\u5f02\u5e38\u5904\u7406\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

func function() (resultType, error) {\n    \/\/ ...\n}<\/pre>\n
\u5728\u8fd9\u4e2a\u8bed\u6cd5\u4e2d\uff1a<\/p>\n
    \n
  • function<\/code> \u662f\u51fd\u6570\u540d\u79f0<\/li>\n
  • resultType<\/code> \u662f\u51fd\u6570\u8fd4\u56de\u7684\u7c7b\u578b\uff08\u5982\u679c\u51fd\u6570\u4e0d\u8fd4\u56de\u9519\u8bef\uff0c\u5219\u4e3a error<\/code> \u7c7b\u578b\uff09<\/li>\n
  • error<\/code> \u662f\u8fd4\u56de\u9519\u8bef\u7c7b\u578b\u7684\u53d8\u91cf\u540d<\/li>\n<\/ul>\n
    \u5982\u679c\u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u975e\u7a7a\u7684\u9519\u8bef\u503c\uff0c\u5219\u51fd\u6570\u8c03\u7528\u5c06\u5f15\u53d1 panic\u3002panic \u4f1a\u5bfc\u81f4\u7a0b\u5e8f\u7ec8\u6b62\uff0c\u9664\u975e\u88ab recover()<\/code> \u51fd\u6570\u6355\u83b7\u3002<\/p>\n
    \u6700\u4f73\u5b9e\u8df5<\/strong><\/p>\n
    \u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\u5305\u62ec\uff1a<\/p>\n
      \n
    • \u4f7f\u7528\u9519\u8bef\u503c\u8fdb\u884c\u9519\u8bef\u5904\u7406\uff1a<\/strong>\u5728\u51fd\u6570\u4e2d\u4f7f\u7528 error<\/code> \u7c7b\u578b\u6765\u8868\u793a\u9519\u8bef\uff0c\u5e76\u8fd4\u56de\u8be5 error<\/code> \u503c\u3002<\/li>\n
    • \u4f7f\u7528 defer<\/code> \u8bed\u53e5\u6e05\u7406\u8d44\u6e90\uff1a<\/strong>\u4f7f\u7528 defer<\/code> \u8bed\u53e5\u6765\u786e\u4fdd\u5728\u51fa\u73b0\u5f02\u5e38\u65f6\uff0c\u65e0\u8bba\u51fd\u6570\u662f\u5426\u6210\u529f\u6267\u884c\uff0c\u90fd\u4f1a\u91ca\u653e\u8d44\u6e90\u3002<\/li>\n
    • \u4f7f\u7528 recover()<\/code> \u51fd\u6570\u6355\u83b7 panic\uff1a<\/strong>\u4f7f\u7528 recover()<\/code> \u51fd\u6570\u6355\u83b7 panic \u5e76\u91c7\u53d6\u9002\u5f53\u7684\u63aa\u65bd\uff0c\u4f8b\u5982\u8bb0\u5f55\u9519\u8bef\u6216\u8fd4\u56de\u9519\u8bef\u3002<\/li>\n<\/ul>\n
      \u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
      \u4ee5\u4e0b\u662f\u4e00\u4e2a\u6253\u5f00\u6587\u4ef6\u7684\u51fd\u6570\uff0c\u6f14\u793a\u9519\u8bef\u5904\u7406\uff1a<\/p>\n
      import (\n    \"fmt\"\n    \"io\/ioutil\"\n    \"os\"\n)\n\nfunc openFile(filename string) ([]byte, error) {\n    defer func() {\n        if r := recover(); r != nil {\n            fmt.Println(\"An error occurred:\", r)\n        }\n    }()\n\n    f, err := os.Open(filename)\n    if err != nil {\n        return nil, err\n    }\n\n    defer f.Close()\n\n    return ioutil.ReadAll(f)\n}\n\nfunc main() {\n    data, err := openFile(\"test.txt\")\n    if err != nil {\n        fmt.Println(\"Error opening file:\", err)\n    } else {\n        fmt.Println(string(data))\n    }\n}<\/pre>\n
      \u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff1a<\/p>\n
        \n
      • openFile<\/code> \u51fd\u6570\u8fd4\u56de\u4e00\u4e2a\u5b57\u8282\u5207\u7247\u548c\u4e00\u4e2a error<\/code>\u3002<\/li>\n
      • \u5982\u679c\u6587\u4ef6\u6253\u5f00\u5931\u8d25\uff0copenFile<\/code> \u4f1a\u8fd4\u56de\u4e00\u4e2a\u975e\u7a7a\u7684 error<\/code>\uff0c\u5e76\u5bfc\u81f4 panic\u3002<\/li>\n
      • recover()<\/code> \u51fd\u6570\u88ab\u7528\u6765\u6355\u83b7 panic \u5e76\u6253\u5370\u9519\u8bef\u4fe1\u606f\u3002<\/li>\n
      • defer<\/code> \u8bed\u53e5\u7528\u4e8e\u5728\u51fd\u6570\u8fd4\u56de\u4e4b\u524d\u5173\u95ed\u6587\u4ef6\u3002<\/li>\n
      • \u4e3b\u51fd\u6570\u8c03\u7528 openFile<\/code> \u5e76\u5904\u7406\u4efb\u4f55\u9519\u8bef\u3002<\/li>\n<\/ul>\n
        \u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300aGOLANG \u51fd\u6570\u5f02\u5e38\u5904\u7406\u673a\u5236\u7b80\u4ecb\u53ca\u6700\u4f73\u5b9e\u8df5\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8egolang,\u5f02\u5e38\u5904\u7406\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n
        \n
        \n <\/dt>\n
        \n   PHP \u5185\u5b58\u7ba1\u7406\u673a\u5236\u5bf9\u51fd\u6570\u6027\u80fd\u7684\u5f71\u54cd\u548c\u4f18\u5316\n <\/dd>\n<\/dl>\n
        \n
        \n <\/dt>\n
        \n   Prettier\u3001Biomejs \u548c VoidZero \u7684\u8be6\u7ec6\u6bd4\u8f83\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
        \u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26...<\/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-205842","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205842","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=205842"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205842\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205842"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205842"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205842"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}