{"id":203736,"date":"2025-05-22T10:03:32","date_gmt":"2025-05-22T02:03:32","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203736\/"},"modified":"2025-05-22T10:03:32","modified_gmt":"2025-05-22T02:03:32","slug":"springboot-2-2-x-%e4%b8%8b%e5%a6%82%e4%bd%95%e4%bc%98%e9%9b%85%e5%9c%b0%e5%88%a4%e6%96%ad%e5%af%b9%e8%b1%a1%e4%b8%ba%e7%a9%ba%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203736\/","title":{"rendered":"SpringBoot 2.2.x \u4e0b\u5982\u4f55\u4f18\u96c5\u5730\u5224\u65ad\u5bf9\u8c61\u4e3a\u7a7a\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>SpringBoot 2.2.x \u4e0b\u5982\u4f55\u4f18\u96c5\u5730\u5224\u65ad\u5bf9\u8c61\u4e3a\u7a7a\uff1f<\/h1>\n<p>\u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aSpringBoot 2.2.x \u4e0b\u5982\u4f55\u4f18\u96c5\u5730\u5224\u65ad\u5bf9\u8c61\u4e3a\u7a7a\uff1f\u300b<\/span>\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241120\/1732102979673dcb4376bd8.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>SpringBoot 2.2.x \u4e0b\u5224\u65ad\u5bf9\u8c61\u4e3a\u7a7a\u65f6\u7684IDEA\u63d0\u793a\u5904\u7406<\/strong><\/p>\n<p>\u5728\u4f7f\u7528\u4e86Spring Boot 2.2.x \u6846\u67b6\u8fdb\u884cJPA\u67e5\u8be2\u65f6\uff0c\u5f00\u53d1\u8005\u53ef\u80fd\u4f1a\u9047\u5230IDE\u63d0\u793a\u7684\u5bf9\u8c61\u4e3a\u7a7a\uff0c\u5bfc\u81f4\u7f16\u8bd1\u9519\u8bef\u7684\u60c5\u51b5\u3002\u90a3\u4e48\uff0c\u5728\u8be5\u573a\u666f\u4e0b\uff0c\u5982\u4f55\u6b63\u786e\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u5462\uff1f<\/p>\n<p>\u8fd9\u4e2a\u95ee\u9898\u7684\u6839\u6e90\u5728\u4e8e\u5f00\u53d1\u8005\u5728\u8c03\u7528\u4e86\u4e00\u4e2a\u53ef\u80fd\u4e3a null \u7684\u5bf9\u8c61\u65b9\u6cd5\u3002\u5f53\u7cfb\u7edf\u8ba4\u4e3a\u8be5\u5bf9\u8c61\u4e0d\u4f1a\u4e3a null \u65f6\uff0c\u4f46\u5f00\u53d1\u8005\u53c8\u8fdb\u884c\u4e86\u7a7a\u5224\u65ad\uff0c\u5c31\u4f1a\u5f15\u53d1\u63d0\u793a\u3002<\/p>\n<p>\u5bf9\u6b64\uff0c\u89e3\u51b3\u529e\u6cd5\u662f\uff1a\u907f\u514d\u8c03\u7528\u53ef\u80fd\u4e3a null \u7684\u5bf9\u8c61\u65b9\u6cd5\u3002\u5982\u679c\u786e\u5b9e\u9700\u8981\u5224\u65ad\u5bf9\u8c61\u7684\u4e3a\u7a7a\u6027\uff0c\u53ef\u4ee5\u91c7\u7528\u4ee5\u4e0b\u65b9\u5f0f\uff1a<\/p>\n<ol>\n<li><strong>\u4f7f\u7528Java 8 Optional \u7c7b\uff1a<\/strong> Optional \u7c7b\u4e3a\u5904\u7406\u53ef\u80fd\u4e3a null \u7684\u5bf9\u8c61\u63d0\u4f9b\u4e86\u4fbf\u5229\u65b9\u6cd5\u3002\u901a\u8fc7\u4f7f\u7528 Optional#isPresent() \u65b9\u6cd5\u53ef\u4ee5\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u5b58\u5728\uff0c\u907f\u514d\u4e86\u76f4\u63a5\u4f7f\u7528 null \u68c0\u67e5\u7684\u5f0a\u7aef\u3002<\/li>\n<li><strong>\u4f7f\u7528Elvis \u8fd0\u7b97\u7b26\uff1a<\/strong> Elvis \u8fd0\u7b97\u7b26 (?:) \u662f\u4e00\u79cd\u4e09\u5143\u8fd0\u7b97\u7b26\uff0c\u5f53\u5de6\u64cd\u4f5c\u6570\u4e0d\u4e3a null \u65f6\uff0c\u8fd4\u56de\u5de6\u64cd\u4f5c\u6570\uff1b\u5426\u5219\uff0c\u8fd4\u56de\u53f3\u64cd\u4f5c\u6570\u3002\u8be5\u8fd0\u7b97\u7b26\u53ef\u4ee5\u7b80\u6d01\u660e\u4e86\u5730\u5904\u7406 null \u68c0\u67e5\u3002<\/li>\n<\/ol>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aSpringBoot 2.2.x \u4e0b\u5982\u4f55\u4f18\u96c5\u5730\u5224\u65ad\u5bf9\u8c61\u4e3a\u7a7a\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>SpringBoot 2.2.x&#46;&#46;&#46;<\/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-203736","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203736","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=203736"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203736\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203736"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203736"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203736"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}