{"id":203624,"date":"2025-05-22T09:06:44","date_gmt":"2025-05-22T01:06:44","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203624\/"},"modified":"2025-05-22T09:06:44","modified_gmt":"2025-05-22T01:06:44","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8%e4%b8%80%e4%b8%aa%e6%98%a0%e5%b0%84%ef%bc%88map%ef%bc%89%e4%b8%ad%e5%ad%98%e5%82%a8%e4%b8%8d%e5%90%8c%e7%b1%bb%e7%9a%84%e5%a4%9a%e4%b8%aa-getter-%e6%96%b9%e6%b3%95%e5%bc%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203624\/","title":{"rendered":"\u5982\u4f55\u5728\u4e00\u4e2a\u6620\u5c04\uff08Map\uff09\u4e2d\u5b58\u50a8\u4e0d\u540c\u7c7b\u7684\u591a\u4e2a getter \u65b9\u6cd5\u5f15\u7528\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u5728\u4e00\u4e2a\u6620\u5c04\uff08Map\uff09\u4e2d\u5b58\u50a8\u4e0d\u540c\u7c7b\u7684\u591a\u4e2a getter \u65b9\u6cd5\u5f15\u7528\uff1f<\/h1>\n

\u77e5\u8bc6\u70b9\u638c\u63e1\u4e86\uff0c\u8fd8\u9700\u8981\u4e0d\u65ad\u7ec3\u4e60\u624d\u80fd\u719f\u7ec3\u8fd0\u7528\u3002\u4e0b\u9762\u7ed9\u5927\u5bb6\u5e26\u6765\u4e00\u4e2a\u6587\u7ae0\u5f00\u53d1\u5b9e\u6218\uff0c\u624b\u628a\u624b\u6559\u5927\u5bb6\u5b66\u4e60\u300a\u5982\u4f55\u5728\u4e00\u4e2a\u6620\u5c04\uff08Map\uff09\u4e2d\u5b58\u50a8\u4e0d\u540c\u7c7b\u7684\u591a\u4e2a getter \u65b9\u6cd5\u5f15\u7528\uff1f\u300b\uff0c\u5728\u5b9e\u73b0\u529f\u80fd\u7684\u8fc7\u7a0b\u4e2d\u4e5f\u5e26\u5927\u5bb6\u91cd\u65b0\u6e29\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u6e29\u6545\u800c\u77e5\u65b0\uff0c\u56de\u5934\u770b\u770b\u8bf4\u4e0d\u5b9a\u53c8\u6709\u4e0d\u4e00\u6837\u7684\u611f\u609f\uff01<\/p>\n

<\/p>\n

\u58f0\u660e\u5bb9\u7eb3\u65b9\u6cd5\u5f15\u7528\u7684\u6620\u5c04\uff08Map\uff09<\/strong><\/p>\n

\u5982\u4f55\u5c06\u4e0d\u540c\u7c7b\u7684\u591a\u4e2a\u65b9\u6cd5\u5f15\u7528\u5b58\u50a8\u5728\u4e00\u4e2a\u6620\u5c04\uff08Map\uff09\u4e2d\uff1f\u8fd9\u4e9b\u65b9\u6cd5\u90fd\u662f getter \u65b9\u6cd5\uff0c\u4f46\u8fd4\u56de\u7c7b\u578b\u4e0d\u540c\uff0c\u4f8b\u5982 User::getUsername\u3001Group::getName \u548c Post::getId\u3002<\/p>\n

\u89e3\u51b3\u65b9\u6cd5\uff1a<\/p>\n

\u4f7f\u7528 IDEA \u7684\u4ee3\u7801\u63d0\u793a\u529f\u80fd\uff0c\u5177\u4f53\u6b65\u9aa4\u5982\u4e0b\uff1a<\/p>\n

    \n
  1. \u5728\u4e00\u884c\u65b0\u4ee3\u7801\u4e2d\u8f93\u5165 Arrays.asList(getUsername, getId)\u3002<\/li>\n
  2. \u5728\u5176\u540e\u8f93\u5165 \u201c.var\u201d \u5e76\u6309\u56de\u8f66\u952e\uff0cIDEA \u5c06\u81ea\u52a8\u63d0\u793a\u5217\u8868\u7684\u7c7b\u578b\u548c\u53d8\u91cf\u540d\u3002\u63d0\u793a\u7684\u7c7b\u578b\u4e3a List<? extends Function<? , ?>>\u3002<\/li>\n
  3. \u6620\u5c04\u53ef\u4ee5\u4f7f\u7528\u7c7b\u4f3c\u7684\u58f0\u660e\uff0c\u5c06\u6620\u5c04\u7c7b\u578b\u58f0\u660e\u4e3a Map<String, Function<?, ?>>\u3002<\/li>\n
  4. \u5c06\u65b9\u6cd5\u5f15\u7528\u653e\u5165\u6620\u5c04\u9700\u8981\u7c7b\u578b\u8f6c\u6362\uff0c\u4f8b\u5982\uff0c\u5c06 Group::getId \u653e\u5165\u6620\u5c04\u4e2d\uff1amap.put(“id”, (Function<Group, Long>) Group::getId)\u3002<\/li>\n<\/ol>\n

    \u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u5982\u4f55\u5728\u4e00\u4e2a\u6620\u5c04\uff08Map\uff09\u4e2d\u5b58\u50a8\u4e0d\u540c\u7c7b\u7684\u591a\u4e2a getter \u65b9\u6cd5\u5f15\u7528\uff1f\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u5982\u4f55\u5728\u4e00\u4e2a\u6620\u5c04\uff08Map\uff09\u4e2d\u5b58\u50a8\u4e0d...<\/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-203624","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203624","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=203624"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203624\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203624"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}