{"id":203402,"date":"2025-05-22T08:01:22","date_gmt":"2025-05-22T00:01:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203402\/"},"modified":"2025-05-22T08:01:22","modified_gmt":"2025-05-22T00:01:22","slug":"springboot-%e4%b8%ad%e5%a6%82%e4%bd%95%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\/203402\/","title":{"rendered":"SpringBoot \u4e2d\u5982\u4f55\u5224\u65ad\u5bf9\u8c61\u4e3a\u7a7a\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>SpringBoot \u4e2d\u5982\u4f55\u5224\u65ad\u5bf9\u8c61\u4e3a\u7a7a\uff1f<\/h1>\n<p><span style=\"font-size: 15px\">\u6709\u5fd7\u8005\uff0c\u4e8b\u7adf\u6210\uff01\u5982\u679c\u4f60\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\uff0c\u90a3\u4e48\u672c\u6587<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aSpringBoot \u4e2d\u5982\u4f55\u5224\u65ad\u5bf9\u8c61\u4e3a\u7a7a\uff1f\u300b<\/span>\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff01\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/span><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241107\/1730958520672c54b8cfb29.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>SpringBoot \u5224\u65ad\u5bf9\u8c61\u4e3a\u7a7a<\/strong><\/p>\n<p>\u5728\u4f7f\u7528 JPA \u67e5\u8be2\u6570\u636e\u65f6\uff0c\u6709\u65f6\u4f1a\u51fa\u73b0 IntelliJ IDEA \u63d0\u793a &#8220;Cannot resolve symbol&#8221; \u4ee5\u53ca &#8220;Result of method is incompatible with expected type&#8221; \u7684\u9519\u8bef\u3002\u8fd9\u901a\u5e38\u662f\u56e0\u4e3a\u7cfb\u7edf\u5c06\u5bf9\u8c61\u89c6\u4e3a\u975e\u7a7a\uff0c\u4f46\u53c8\u6dfb\u52a0\u4e86\u7a7a\u5224\u65ad\u5bfc\u81f4\u7684\u3002<\/p>\n<p><strong>\u95ee\u9898\u89e3\u6790<\/strong><\/p>\n<p>\u6839\u636e\u63d0\u793a\u7684\u4fe1\u606f\uff0c\u95ee\u9898\u7684\u6838\u5fc3\u5728\u4e8e\u5982\u4f55\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u3002\u9519\u8bef\u63d0\u793a\u8868\u660e\uff0c\u5bf9\u8c61\u5728 System.out.print \u4e2d\u88ab\u8c03\u7528\uff0c\u5982\u679c\u4e3a\u7a7a\uff0c\u5219\u4f1a\u51fa\u73b0\u9519\u8bef\u3002\u7136\u800c\uff0c\u7531\u4e8e\u7cfb\u7edf\u5047\u5b9a\u8be5\u5bf9\u8c61\u975e\u7a7a\uff0c\u800c\u7a0b\u5e8f\u4e2d\u53c8\u5305\u542b\u7a7a\u5224\u65ad\uff0c\u56e0\u6b64\u4ea7\u751f\u4e86\u77db\u76fe\uff0c\u5bfc\u81f4\u9519\u8bef\u63d0\u793a\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6848<\/strong><\/p>\n<p>\u4e3a\u4e86\u89e3\u51b3\u8be5\u95ee\u9898\uff0c\u9700\u8981\u6839\u636e\u5177\u4f53\u60c5\u51b5\u7075\u6d3b\u5904\u7406\uff1a<\/p>\n<ul>\n<li><strong>\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u4e3a null\uff1a<\/strong>\u53ef\u4ee5\u4f7f\u7528\u4f20\u7edf\u7684 null \u68c0\u67e5\uff0c\u5373 if (object == null)\u3002<\/li>\n<li><strong>\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u96c6\u5408\u6216\u7a7a\u5b57\u7b26\u4e32\uff1a<\/strong>\u5bf9\u4e8e\u96c6\u5408\u6216\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u4f7f\u7528 isEmpty() \u6216 isBlank() \u7b49\u65b9\u6cd5\u8fdb\u884c\u5224\u65ad\u3002<\/li>\n<li><strong>\u6839\u636e\u4e1a\u52a1\u903b\u8f91\u5224\u65ad\uff1a<\/strong>\u5982\u679c\u5bf9\u8c61\u4e3a\u7a7a\u7684\u95ee\u9898\u662f\u7531\u4e8e\u4e1a\u52a1\u903b\u8f91\u5bfc\u81f4\u7684\uff0c\u5219\u9700\u8981\u4fee\u6539\u4e1a\u52a1\u903b\u8f91\uff0c\u4ee5\u6b63\u786e\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u4e3a\u7a7a\u3002<\/li>\n<\/ul>\n<p>\u4eca\u5929\u5173\u4e8e\u300aSpringBoot \u4e2d\u5982\u4f55\u5224\u65ad\u5bf9\u8c61\u4e3a\u7a7a\uff1f\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>SpringBoot \u4e2d\u5982\u4f55\u5224\u65ad&#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-203402","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203402","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=203402"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203402\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203402"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}