{"id":205500,"date":"2025-06-12T10:22:04","date_gmt":"2025-06-12T02:22:04","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205500\/"},"modified":"2025-06-12T10:22:04","modified_gmt":"2025-06-12T02:22:04","slug":"%e5%a4%84%e7%90%86-golang-%e5%87%bd%e6%95%b0%e4%b8%ad%e7%9a%84%e9%94%99%e8%af%af%e7%9a%84%e6%9c%80%e4%bd%b3%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205500\/","title":{"rendered":"\u5904\u7406 Golang \u51fd\u6570\u4e2d\u7684\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5"},"content":{"rendered":"

\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765
\n\u300a\u5904\u7406 GOLANG \u51fd\u6570\u4e2d\u7684\u9519\u8bef\u7684\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,\u5728 Go \u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\u5305\u62ec\u4f7f\u7528 error \u7c7b\u578b\u3001\u5229\u7528 errors.New \u548c fmt.Errorf \u521b\u5efa\u9519\u8bef\u3001\u4f20\u64ad\u9519\u8bef\u503c\u3001\u4f7f\u7528 if \u8bed\u53e5\u5904\u7406\u9519\u8bef\u4ee5\u53ca\u4f7f\u7528 defer \u8bed\u53e5\u5173\u95ed\u8d44\u6e90\u3002,
\n,
\n\u5904\u7406 GOLANG \u51fd\u6570\u4e2d\u7684\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5<\/strong>,\u5728 GOLANG \u4e2d\u5904\u7406\u9519\u8bef\u5bf9\u4e8e\u7f16\u5199\u5065\u58ee\u4e14\u53ef\u7ef4\u62a4\u7684\u4ee3\u7801\u81f3\u5173\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u5904\u7406\u9519\u8bef\u7684\u4e00\u4e9b\u6700\u4f73\u5b9e\u8df5\uff1a,
\n1. \u4f7f\u7528 error<\/code> \u7c7b\u578b<\/strong>,Go \u4e2d\u7684\u9519\u8bef\u8868\u793a\u4e3a
\nerror<\/code> \u7c7b\u578b\u3002\u5b83\u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u5141\u8bb8\u5b9a\u4e49\u548c\u5904\u7406\u81ea\u5b9a\u4e49\u9519\u8bef\u7c7b\u578b\u3002,
\n2. \u4f7f\u7528 errors.New<\/code> \u521b\u5efa\u9519\u8bef<\/strong>,
\nerrors.New<\/code> \u51fd\u6570\u53ef\u4ee5\u5feb\u901f\u521b\u5efa\u65b0\u7684
\nerror<\/code> \u503c\u3002,
\n3. \u4f7f\u7528 fmt.Errorf<\/code> \u521b\u5efa\u5e26\u683c\u5f0f\u7684\u9519\u8bef<\/strong>,
\nfmt.Errorf<\/code> \u51fd\u6570\u53ef\u4ee5\u521b\u5efa\u5e26\u683c\u5f0f\u7684\u9519\u8bef\uff0c\u5176\u4e2d\u5305\u542b\u989d\u5916\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f\u3002,
\n4. Propagate Error Values<\/strong>,\u5982\u679c\u51fd\u6570\u4e0d\u80fd\u5904\u7406\u9519\u8bef\uff0c\u5b83\u5e94\u8be5\u5c06\u9519\u8bef\u503c\u4f20\u9012\u7ed9\u8c03\u7528\u65b9\u3002,
\n5. \u5904\u7406\u9519\u8bef<\/strong>,\u9519\u8bef\u53ef\u4ee5\u50cf\u8fd9\u6837\u4f7f\u7528
\nif<\/code> \u8bed\u53e5\u5904\u7406\uff1a,
\n6. \u4f7f\u7528 defer<\/code> \u5173\u95ed\u8d44\u6e90<\/strong>,
\ndefer<\/code> \u8bed\u53e5\u53ef\u786e\u4fdd\u5728\u51fd\u6570\u8fd4\u56de\u4e4b\u524d\u5173\u95ed\u8d44\u6e90\uff0c\u5373\u4f7f\u53d1\u751f\u9519\u8bef\u3002,
\n\u5b9e\u6218\u793a\u4f8b\uff1a<\/strong>,\u4e0b\u9762\u7684\u793a\u4f8b\u6f14\u793a\u4e86\u4e0a\u8ff0\u6700\u4f73\u5b9e\u8df5\uff1a,\u4ee5\u4e0a\u5c31\u662f\u300a\u5904\u7406 GOLANG \u51fd\u6570\u4e2d\u7684\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8egolang,\u9519\u8bef\u5904\u7406\u7684\u8d44\u6599\u8bf7\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff01,\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765
\n\u300a\u5904\u7406 GOLANG \u51fd\u6570\u4e2d\u7684\u9519\u8bef\u7684\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> \u5904\u7406 GOLANG \u51fd\u6570\u4e2d\u7684\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5<\/span><\/p>\n

\u5904\u7406 GOLANG \u51fd\u6570\u4e2d\u7684\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5<\/h1>\n

2024-10-26 11:46:59<\/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\u300a\u5904\u7406 GOLANG \u51fd\u6570\u4e2d\u7684\u9519\u8bef\u7684\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

\u5728 Go \u4e2d\u5904\u7406\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\u5305\u62ec\u4f7f\u7528 error \u7c7b\u578b\u3001\u5229\u7528 errors.New \u548c fmt.Errorf \u521b\u5efa\u9519\u8bef\u3001\u4f20\u64ad\u9519\u8bef\u503c\u3001\u4f7f\u7528 if \u8bed\u53e5\u5904\u7406\u9519\u8bef\u4ee5\u53ca\u4f7f\u7528 defer \u8bed\u53e5\u5173\u95ed\u8d44\u6e90\u3002<\/p>\n

<\/p>\n

\u5904\u7406 GOLANG \u51fd\u6570\u4e2d\u7684\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5<\/strong><\/p>\n

\u5728 GOLANG \u4e2d\u5904\u7406\u9519\u8bef\u5bf9\u4e8e\u7f16\u5199\u5065\u58ee\u4e14\u53ef\u7ef4\u62a4\u7684\u4ee3\u7801\u81f3\u5173\u91cd\u8981\u3002\u4ee5\u4e0b\u662f\u5904\u7406\u9519\u8bef\u7684\u4e00\u4e9b\u6700\u4f73\u5b9e\u8df5\uff1a<\/p>\n

1. \u4f7f\u7528 error<\/code> \u7c7b\u578b<\/strong><\/p>\n

Go \u4e2d\u7684\u9519\u8bef\u8868\u793a\u4e3a error<\/code> \u7c7b\u578b\u3002\u5b83\u662f\u4e00\u4e2a\u63a5\u53e3\uff0c\u5141\u8bb8\u5b9a\u4e49\u548c\u5904\u7406\u81ea\u5b9a\u4e49\u9519\u8bef\u7c7b\u578b\u3002<\/p>\n

type MyError struct {\n    Message string\n}\n\nfunc (e MyError) Error() string {\n    return e.Message\n}<\/pre>\n
2. \u4f7f\u7528 errors.New<\/code> \u521b\u5efa\u9519\u8bef<\/strong><\/p>\n
errors.New<\/code> \u51fd\u6570\u53ef\u4ee5\u5feb\u901f\u521b\u5efa\u65b0\u7684 error<\/code> \u503c\u3002<\/p>\n
err := errors.New(\"some error occurred\")<\/pre>\n
3. \u4f7f\u7528 fmt.Errorf<\/code> \u521b\u5efa\u5e26\u683c\u5f0f\u7684\u9519\u8bef<\/strong><\/p>\n
fmt.Errorf<\/code> \u51fd\u6570\u53ef\u4ee5\u521b\u5efa\u5e26\u683c\u5f0f\u7684\u9519\u8bef\uff0c\u5176\u4e2d\u5305\u542b\u989d\u5916\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f\u3002<\/p>\n
err := fmt.Errorf(\"failed to open file: %v\", filename)<\/pre>\n
4. Propagate Error Values<\/strong><\/p>\n
\u5982\u679c\u51fd\u6570\u4e0d\u80fd\u5904\u7406\u9519\u8bef\uff0c\u5b83\u5e94\u8be5\u5c06\u9519\u8bef\u503c\u4f20\u9012\u7ed9\u8c03\u7528\u65b9\u3002<\/p>\n
func OpenFile(filename string) (*File, error) {\n    f, err := os.Open(filename)\n    if err != nil {\n        return nil, err\n    }\n    return f, nil\n}<\/pre>\n
5. \u5904\u7406\u9519\u8bef<\/strong><\/p>\n
\u9519\u8bef\u53ef\u4ee5\u50cf\u8fd9\u6837\u4f7f\u7528 if<\/code> \u8bed\u53e5\u5904\u7406\uff1a<\/p>\n
if err != nil {\n    \/\/ \u9519\u8bef\u5904\u7406\u903b\u8f91\n}<\/pre>\n
6. \u4f7f\u7528 defer<\/code> \u5173\u95ed\u8d44\u6e90<\/strong><\/p>\n
defer<\/code> \u8bed\u53e5\u53ef\u786e\u4fdd\u5728\u51fd\u6570\u8fd4\u56de\u4e4b\u524d\u5173\u95ed\u8d44\u6e90\uff0c\u5373\u4f7f\u53d1\u751f\u9519\u8bef\u3002<\/p>\n
func OpenFile(filename string) error {\n    f, err := os.Open(filename)\n    if err != nil {\n        return err\n    }\n    defer f.Close()\n    \/\/ \u4ee3\u7801...\n    return nil\n}<\/pre>\n
\u5b9e\u6218\u793a\u4f8b\uff1a<\/strong><\/p>\n
\u4e0b\u9762\u7684\u793a\u4f8b\u6f14\u793a\u4e86\u4e0a\u8ff0\u6700\u4f73\u5b9e\u8df5\uff1a<\/p>\n
package main\n\nimport (\n    \"errors\"\n    \"fmt\"\n    \"os\"\n)\n\ntype MyError struct {\n    Message string\n}\n\nfunc (e MyError) Error() string {\n    return e.Message\n}\n\nfunc OpenFile(filename string) (*os.File, error) {\n    f, err := os.Open(filename)\n    if err != nil {\n        return nil, fmt.Errorf(\"failed to open file: %v\", filename)\n    }\n    defer f.Close()\n    return f, nil\n}\n\nfunc main() {\n    f, err := OpenFile(\"myfile.txt\")\n    if err != nil {\n        \/\/ \u9519\u8bef\u5904\u7406\u903b\u8f91\n    }\n    fmt.Println(f.Name())\n}<\/pre>\n
\u4ee5\u4e0a\u5c31\u662f\u300a\u5904\u7406 GOLANG \u51fd\u6570\u4e2d\u7684\u9519\u8bef\u7684\u6700\u4f73\u5b9e\u8df5\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8egolang,\u9519\u8bef\u5904\u7406\u7684\u8d44\u6599\u8bf7\u5173\u6ce8GOLANG\u516c\u4f17\u53f7\uff01<\/p>\n
\n
\n <\/dt>\n
\n   GOLANG \u6846\u67b6\u7684\u5b89\u5168\u4f53\u7cfb\u7ed3\u6784\u548c\u5a01\u80c1\u5efa\u6a21\n <\/dd>\n<\/dl>\n
\n
\n <\/dt>\n
\n   \u8363\u4e8b\u8fbe\u7a7a\u8c03\u9065\u63a7\u5668\u624b\u673a\u7248\uff1f\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-205500","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205500","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=205500"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205500\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205500"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205500"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205500"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}