{"id":44270,"date":"2023-09-20T23:01:32","date_gmt":"2023-11-23T13:08:48","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8e-golang-%e5%88%87%e7%89%87%e7%9a%84%e5%8f%8d%e5%b0%84\/"},"modified":"2024-05-04T00:46:49","modified_gmt":"2024-05-03T16:46:49","slug":"%e5%85%b3%e4%ba%8e-golang-%e5%88%87%e7%89%87%e7%9a%84%e5%8f%8d%e5%b0%84","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e5%85%b3%e4%ba%8e-golang-%e5%88%87%e7%89%87%e7%9a%84%e5%8f%8d%e5%b0%84\/","title":{"rendered":"\u5173\u4e8e Golang \u5207\u7247\u7684\u53cd\u5c04"},"content":{"rendered":"
package<\/span> main<\/span>\r\n\r\nimport<\/span> (<\/span>\r\n    \"fmt\"<\/span>\r\n    \"reflect\"<\/span>\r\n)<\/span>\r\n\r\n\/\/ \u57fa\u672c\u578b\uff08Bool, String, \u3059\u3079\u3066\u306e\u6570\u5024\uff09<\/span>\r\n\/\/ \u5408\u6210\u578b\uff08Struct, Array\uff09<\/span>\r\n\/\/ \u53c2\u7167\u578b\uff08Chan, Func, Ptr, Slice, Map, Interface{}\uff09<\/span>\r\n\/\/ \u305d\u306e\u4ed6\uff08reflect.Value\u306e\u30bc\u30ed\u5024, \u5168\u304f\u5024\u3067\u306f\u306a\u3044\u3068\u3044\u3046\u610f\u5473\u306e Invalid\uff09<\/span>\r\n\r\n\/\/ .Elem()\u306f\u3001\u30dd\u30a4\u30f3\u30bf\u578b\u306e\u3068\u304d\u5b9f\u4f53\u3092\u8fd4\u3059\u3002\u307e\u305f\u3001\u30dd\u30a4\u30f3\u30bf\u578b\u306ereflect.value\u306e\u307f\u3001\u5024\u3092\u30bb\u30c3\u30c8\u3067\u304d\u308b\u3002<\/span>\r\n\/\/ .Interface()\u306f\u3001interfece{}\u306e\u5024\u3092\u8fd4\u3057\u307e\u3059\u3002<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n    type<\/span> Foo<\/span> struct<\/span> {<\/span>\r\n        Name<\/span> string<\/span> `json:\"name\" bson:\"name\"`<\/span>\r\n    }<\/span>\r\n\r\n    arr<\/span> :=<\/span> []<\/span>Foo<\/span>{}<\/span>                      \/\/ \u7a7a\u306e\u30b9\u30e9\u30a4\u30b9\u3092\u4f5c\u6210<\/span>\r\n    arr<\/span> =<\/span> append<\/span>(<\/span>arr<\/span>,<\/span> Foo<\/span>{<\/span>Name<\/span>:<\/span> \"aaa\"<\/span>})<\/span> \/\/ \u7a7a\u306e\u30b9\u30e9\u30a4\u30b9\u306b\u69cb\u9020\u4f53\u3092\uff11\u500b\u8ffd\u52a0<\/span>\r\n\r\n    \/\/ ------------------------------ \u3053\u3053\u307e\u3067\u666e\u901a\u3002<\/span>\r\n\r\n    \/\/ \u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u578b\u306e\u72b6\u614b\u3067\u64cd\u4f5c\u3067\u304d\u308b\u3088\u3046\u306b\u30dd\u30a4\u30f3\u30bf\u3092\u6e21\u3059\u3002<\/span>\r\n    \/\/ \u3053\u306e\u6642\u70b9\u3067\u30c7\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u6700\u5f8c\u306b\u623b\u3059\u3068\u304d\u306b\u306f\u30c7\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u306f\u5fc5\u8981\u306a\u3044\u3002<\/span>\r\n    s<\/span> :=<\/span> reflect<\/span>.<\/span>ValueOf<\/span>(<\/span>&<\/span>arr<\/span>)<\/span>.<\/span>Elem<\/span>()<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>s<\/span>.<\/span>CanAddr<\/span>(),<\/span> s<\/span>.<\/span>CanSet<\/span>())<\/span> \/\/ true true<\/span>\r\n\r\n    rv<\/span> :=<\/span> reflect<\/span>.<\/span>New<\/span>(<\/span>reflect<\/span>.<\/span>TypeOf<\/span>(<\/span>Foo<\/span>{}))<\/span> \/\/ reflect.New\u306e\u5834\u5408\u306f\u3001\u30dd\u30a4\u30f3\u30bf\u578b\u3067\u4f5c\u6210\u3055\u308c\u308b\u3001\u6700\u521d\u304b\u3089\u8fbf\u308c\u308b\u3057\u30bb\u30c3\u30c8\u3082\u3067\u304d\u308b<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>rv<\/span>)<\/span>                          \/\/ &{}<\/span>\r\n    rve<\/span> :=<\/span> rv<\/span>.<\/span>Elem<\/span>()<\/span>                         \/\/ {} \u30c7\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>rv<\/span>.<\/span>CanAddr<\/span>(),<\/span> rv<\/span>.<\/span>CanSet<\/span>())<\/span>   \/\/ true true<\/span>\r\n    \/\/ rve.Field(0).SetString(\"eee\")                   \/\/ OK<\/span>\r\n    \/\/ rve.Field(0).Set(reflect.ValueOf(\"eee\"))        \/\/ OK<\/span>\r\n    rve<\/span>.<\/span>FieldByName<\/span>(<\/span>\"Name\"<\/span>)<\/span>.<\/span>SetString<\/span>(<\/span>\"bbb\"<\/span>)<\/span>\r\n    s<\/span>.<\/span>Set<\/span>(<\/span>reflect<\/span>.<\/span>Append<\/span>(<\/span>s<\/span>,<\/span> rve<\/span>))<\/span>                                       \/\/ OK<\/span>\r\n    s<\/span>.<\/span>Set<\/span>(<\/span>reflect<\/span>.<\/span>Append<\/span>(<\/span>s<\/span>,<\/span> reflect<\/span>.<\/span>ValueOf<\/span>(<\/span>&<\/span>Foo<\/span>{<\/span>Name<\/span>:<\/span> \"ccc\"<\/span>})<\/span>.<\/span>Elem<\/span>()))<\/span> \/\/ OK<\/span>\r\n\r\n    \/\/ \u30ea\u30d5\u30ec\u30af\u30b7\u30e7\u30f3\u578b\u304b\u3089interface{}\u578b\u306b\u3057\u3066\u3001\u578b\u30a2\u30b5\u30fc\u30b7\u30e7\u30f3\u3067\u5143\u306e\u578b\u306b\u623b\u3059<\/span>\r\n    px<\/span> :=<\/span> s<\/span>.<\/span>Interface<\/span>()<\/span>.<\/span>([]<\/span>Foo<\/span>)<\/span>\r\n    fmt<\/span>.<\/span>Println<\/span>(<\/span>px<\/span>)<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u6309\u7167\u5199\u7684\u90a3\u6837\uff0c\u4f46\u662f\u7528.Elem\u8fdb\u884c\u89e3\u5f15\u7528\u4e4b\u7c7b\u7684\u64cd\u4f5c\uff0c\u975e\u5e38\u96be\u7406\u89e3\u3002<\/p>\n
\u6211\u73b0\u5728\u5df2\u7ecf\u80fd\u7406\u89e3\u4e0a\u4e00\u7bc7\u6587\u7ae0\u4e2d\u7684\u9ed1\u9b54\u6cd5\u4ee3\u7801\u4e86\uff3e\uff3e<\/p>\n","protected":false},"excerpt":{"rendered":"
package main import ( “fmt” “reflect” ) \/\/ \u57fa\u672c\u578b\uff08Bool, St […]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44270","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n\u5173\u4e8e Golang \u5207\u7247\u7684\u53cd\u5c04 - 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\/\u5173\u4e8e-golang-\u5207\u7247\u7684\u53cd\u5c04\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u5173\u4e8e Golang \u5207\u7247\u7684\u53cd\u5c04\" \/>\n<meta property=\"og:description\" content=\"package main import ( "fmt" "reflect" ) \/\/ \u57fa\u672c\u578b\uff08Bool, St […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/\u5173\u4e8e-golang-\u5207\u7247\u7684\u53cd\u5c04\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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