{"id":2183,"date":"2019-09-16T23:45:51","date_gmt":"2019-09-16T20:45:51","guid":{"rendered":"http:\/\/demensdeum.com\/blog\/?p=2183"},"modified":"2024-12-16T22:32:34","modified_gmt":"2024-12-16T19:32:34","slug":"composite-pattern","status":"publish","type":"post","link":"https:\/\/demensdeum.com\/blog\/zh\/2019\/09\/16\/composite-pattern\/","title":{"rendered":"\u56fe\u6848\u590d\u5408"},"content":{"rendered":"

Composite\u6a21\u5f0f\u662f\u6307\u7ed3\u6784\u8bbe\u8ba1\u6a21\u5f0f\uff1b\u5728\u56fd\u5185\u88ab\u79f0\u4e3a\u201cCompositor\u201d\u3002
\u5047\u8bbe\u6211\u4eec\u6b63\u5728\u5f00\u53d1\u4e00\u4e2a\u5e94\u7528\u7a0b\u5e8f \u2013\u76f8\u518c\u3002\u7528\u6237\u53ef\u4ee5\u521b\u5efa\u6587\u4ef6\u5939\u3001\u5728\u5176\u4e2d\u6dfb\u52a0\u7167\u7247\u4ee5\u53ca\u6267\u884c\u5176\u4ed6\u64cd\u4f5c\u3002\u60a8\u80af\u5b9a\u9700\u8981\u80fd\u591f\u663e\u793a\u6587\u4ef6\u5939\u4e2d\u7684\u6587\u4ef6\u6570\u91cf\u3001\u6240\u6709\u6587\u4ef6\u548c\u6587\u4ef6\u5939\u7684\u603b\u6570\u3002
\u663e\u7136\u9700\u8981\u4f7f\u7528\u6811\uff0c\u4f46\u662f\u5982\u4f55\u4ee5\u7b80\u5355\u65b9\u4fbf\u7684\u63a5\u53e3\u5b9e\u73b0\u6811\u67b6\u6784\u5462\uff1f\u590d\u5408\u6a21\u5f0f\u6765\u6551\u63f4\u3002<\/p>\n

\"\"<\/a><\/p>\n

\n

\u5e0c\u62c9\u5728\u6708\u9e2d<\/a><\/p>\n

\u6211\u4eec\u7528\u6211\u4eec\u9700\u8981\u7684 dataCount() \u65b9\u6cd5\u5b9e\u73b0 Component \u63a5\u53e3\uff0c\u901a\u8fc7\u8be5\u65b9\u6cd5\u6211\u4eec\u5c06\u8fd4\u56de\u6587\u4ef6\/\u76ee\u5f55\u7684\u6570\u91cf\u3002\u8ba9\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u5e26\u6709\u63a5\u53e3\u7684 Directory \u7c7b\uff0c\u8be5\u63a5\u53e3\u5141\u8bb8\u60a8\u6839\u636e\u6a21\u5f0f\u6dfb\u52a0\/\u5220\u9664\u5b9e\u73b0 Component \u63a5\u53e3\u7684\u7c7b\u7684\u5b9e\u4f8b\uff1b\u8fd9\u5c31\u662f Composite\u3002\u6211\u4eec\u8fd8\u5c06\u521b\u5efa\u4e00\u4e2a File \u7c7b\uff0c\u7528\u4e8e\u5b58\u50a8\u7167\u7247\u5361\u7684\u5b57\u8282\uff0c\u7ee7\u627f\u81ea Component\uff0c\u5e76\u901a\u8fc7 dataCount \u8fd4\u56de 1\uff0c\u8868\u793a\u53ea\u6709\u4e00\u5f20\u7167\u7247\uff01<\/div>\n
\u63a5\u4e0b\u6765\u5728\u76ee\u5f55\u4e2d\u6211\u4eec\u5b9e\u73b0 dataCount() \u65b9\u6cd5 –\u901a\u8fc7\u904d\u5386\u7ec4\u4ef6\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\uff0c\u5c06\u5b83\u4eec\u7684\u6240\u6709 dataCount \u76f8\u52a0\u3002<\/div>\n
\u4e00\u5207\u51c6\u5907\u5c31\u7eea\uff01<\/div>\n
\u4e0b\u9762\u662f Go \u4e2d\u7684\u793a\u4f8b\uff1a<\/div>\n
\n
package main\n\nimport \"fmt\"\n\ntype component interface {\n\ndataCount() int\n\n}\n\ntype file struct {\n\n}\n\ntype directory struct {\n\nc []component\n\n}\n\nfunc (f file) dataCount() int {\n\nreturn 1\n\n}\n\nfunc (d directory) dataCount() int {\n\nvar outputDataCount int = 0\n\nfor _, v := range d.c {\noutputDataCount += v.dataCount()\n}\n\nreturn outputDataCount\n\n}\n\nfunc (d *directory) addComponent(c component) {\n\nd.c = append(d.c, c)\n\n}\n\nfunc main() {\n\nvar f file\nvar rd directory\nrd.addComponent(f)\nrd.addComponent(f)\nrd.addComponent(f)\nrd.addComponent(f)\n\nfmt.Println(rd.dataCount())\n\nvar sd directory\nsd.addComponent(f)\n\nrd.addComponent(sd)\nrd.addComponent(sd)\nrd.addComponent(sd)\n\nfmt.Println(sd.dataCount())\nfmt.Println(rd.dataCount())\n\n}\n<\/code><\/pre>\n<\/div>\n
\u6765\u6e90<\/h3>\n
https:\/\/refactoring.guru\/ru\/design-patterns\/\u590d\u5408<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
Composite\u6a21\u5f0f\u662f\u6307\u7ed3\u6784\u8bbe\u8ba1\u6a21\u5f0f\uff1b\u5728\u56fd\u5185\u88ab\u79f0\u4e3a\u201cCompositor\u201d\u3002\u5047\u8bbe\u6211\u4eec\u6b63\u5728\u5f00\u53d1\u4e00\u4e2a\u5e94\u7528\u7a0b\u5e8f \u2013\u76f8\u518c\u3002\u7528\u6237\u53ef\u4ee5\u521b\u5efa\u6587\u4ef6\u5939\u3001\u5728\u5176\u4e2d\u6dfb\u52a0\u7167\u7247\u4ee5\u53ca\u6267\u884c\u5176\u4ed6\u64cd\u4f5c\u3002\u60a8\u80af\u5b9a\u9700\u8981\u80fd\u591f\u663e\u793a\u6587\u4ef6\u5939\u4e2d\u7684\u6587\u4ef6\u6570\u91cf\u3001\u6240\u6709\u6587\u4ef6\u548c\u6587\u4ef6\u5939\u7684\u603b\u6570\u3002\u663e\u7136\u9700\u8981\u4f7f\u7528\u6811\uff0c\u4f46\u662f\u5982\u4f55\u4ee5\u7b80\u5355\u65b9\u4fbf\u7684\u63a5\u53e3\u5b9e\u73b0\u6811\u67b6\u6784\u5462\uff1f\u590d\u5408\u6a21\u5f0f\u6765\u6551\u63f4\u3002 \u5e0c\u62c9\u5728\u6708\u9e2d \u6211\u4eec\u7528\u6211\u4eec\u9700\u8981\u7684 dataCount() \u65b9\u6cd5\u5b9e\u73b0 Component \u63a5\u53e3\uff0c\u901a\u8fc7\u8be5\u65b9\u6cd5\u6211\u4eec\u5c06\u8fd4\u56de\u6587\u4ef6\/\u76ee\u5f55\u7684\u6570\u91cf\u3002\u8ba9\u6211\u4eec\u521b\u5efa\u4e00\u4e2a\u5e26\u6709\u63a5\u53e3\u7684 Directory \u7c7b\uff0c\u8be5\u63a5\u53e3\u5141\u8bb8\u60a8\u6839\u636e\u6a21\u5f0f\u6dfb\u52a0\/\u5220\u9664\u5b9e\u73b0 Component \u63a5\u53e3\u7684\u7c7b\u7684\u5b9e\u4f8b\uff1b\u8fd9\u5c31\u662f Composite\u3002\u6211\u4eec\u8fd8\u5c06\u521b\u5efa\u4e00\u4e2a File \u7c7b\uff0c\u7528\u4e8e\u5b58\u50a8\u7167\u7247\u5361\u7684\u5b57\u8282\uff0c\u7ee7\u627f\u81ea Component\uff0c\u5e76\u901a\u8fc7 dataCount \u8fd4\u56de 1\uff0c\u8868\u793a\u53ea\u6709\u4e00\u5f20\u7167\u7247\uff01 \u63a5\u4e0b\u6765\u5728\u76ee\u5f55\u4e2d\u6211\u4eec\u5b9e\u73b0 dataCount() \u65b9\u6cd5 –\u901a\u8fc7\u904d\u5386\u7ec4\u4ef6\u6570\u7ec4\u4e2d\u7684\u6240\u6709\u5143\u7d20\uff0c\u5c06\u5b83\u4eec\u7684\u6240\u6709 dataCount \u76f8\u52a0\u3002 \u4e00\u5207\u51c6\u5907\u5c31\u7eea\uff01 \u4e0b\u9762\u662f Go \u4e2d\u7684\u793a\u4f8b\uff1a package main import “fmt” type component interface { dataCount() int } type file struct { } type directory struct { c []component } func (f file)Continue reading “\u56fe\u6848\u590d\u5408”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[61,52],"tags":[116,95],"class_list":["post-2183","post","type-post","status-publish","format-standard","hentry","category-techie","category-tutorials","tag-composite","tag-patterns","entry"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"zh","enabled_languages":["en","ru","zh","de","fr","ja","pt","hi"],"languages":{"en":{"title":true,"content":true,"excerpt":false},"ru":{"title":true,"content":true,"excerpt":false},"zh":{"title":true,"content":true,"excerpt":false},"de":{"title":true,"content":true,"excerpt":false},"fr":{"title":true,"content":true,"excerpt":false},"ja":{"title":true,"content":true,"excerpt":false},"pt":{"title":true,"content":true,"excerpt":false},"hi":{"title":false,"content":false,"excerpt":false}}},"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/posts\/2183","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/comments?post=2183"}],"version-history":[{"count":11,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/posts\/2183\/revisions"}],"predecessor-version":[{"id":3944,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/posts\/2183\/revisions\/3944"}],"wp:attachment":[{"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/media?parent=2183"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/categories?post=2183"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/demensdeum.com\/blog\/zh\/wp-json\/wp\/v2\/tags?post=2183"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}