{"id":203911,"date":"2025-05-22T12:36:51","date_gmt":"2025-05-22T04:36:51","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203911\/"},"modified":"2025-05-22T12:36:51","modified_gmt":"2025-05-22T04:36:51","slug":"java%e9%9d%a2%e8%af%95%e9%a2%98%ef%bc%9a%e5%a6%82%e4%bd%95%e6%ad%a3%e7%a1%ae%e5%88%a4%e6%96%ad%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%98%af%e5%90%a6%e4%b8%ba%e7%a9%ba%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203911\/","title":{"rendered":"Java\u9762\u8bd5\u9898\uff1a\u5982\u4f55\u6b63\u786e\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java\u9762\u8bd5\u9898\uff1a\u5982\u4f55\u6b63\u786e\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\uff1f<\/h1>\n<p>\u5728\u6587\u7ae0\u5b9e\u6218\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u4e9b\u8fd9\u6837\u90a3\u6837\u7684\u95ee\u9898\uff0c\u7136\u540e\u8981\u5361\u597d\u534a\u5929\uff0c\u7b49\u95ee\u9898\u89e3\u51b3\u4e86\u624d\u53d1\u73b0\u539f\u6765\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u662f\u6ca1\u6709\u638c\u63e1\u597d\u3002\u4eca\u5929\u5c31\u6574\u7406\u5206\u4eab\u300aJava\u9762\u8bd5\u9898\uff1a\u5982\u4f55\u6b63\u786e\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\uff1f\u300b\uff0c\u804a\u804a\uff0c\u5e0c\u671b\u53ef\u4ee5\u5e2e\u52a9\u5230\u6b63\u5728\u52aa\u529b\u8d5a\u94b1\u7684\u4f60\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241130\/1732968214674aff165c362.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\u7684\u6b63\u786e\u51fd\u6570<\/strong><\/p>\n<p>\u9762\u8bd5\u4e2d\uff0c70% \u4ee5\u4e0a\u7684 java \u5e94\u8058\u8005\u56de\u7b54\u9519\u8bef\u7684\u4e00\u9053\u9898\u662f\uff1a\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\u7684\u51fd\u6570\u3002\u8ba9\u6211\u4eec\u770b\u770b\u6b63\u786e\u7684\u5b9e\u73b0\u3002<\/p>\n<p>\u9898\u76ee\uff1a<\/p>\n<pre>public boolean isEmptyString(String str) {\n    return str == null || str.length() == 0;\n}<\/pre>\n<p>\u7b54\u6848\uff1a<\/p>\n<p>\u7ed9\u51fa\u7684\u4ee3\u7801\uff08\u9009\u9879 a\uff09\u662f\u6b63\u786e\u7684\u3002\u5b83\u5148\u662f\u68c0\u67e5\u5b57\u7b26\u4e32\u662f\u5426\u4e3a null\uff0c\u7136\u540e\u68c0\u67e5\u5176\u957f\u5ea6\u662f\u5426\u4e3a 0\u3002\u8fd9\u662f\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\u7684\u6b63\u786e\u65b9\u6cd5\u3002<\/p>\n<p>\u5176\u4ed6\u9009\u9879\uff1a<\/p>\n<p>\u9009\u9879 b\uff1astr.length() == 0 || str == null\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5f15\u53d1\u7a7a\u6307\u9488\u5f02\u5e38\uff0c\u56e0\u4e3a\u5b57\u7b26\u4e32\u53ef\u80fd\u662f null\u3002<\/p>\n<p>\u9009\u9879 c\uff1astr == &#8220;&#8221; || str.length() == 0\uff0c\u8fd9\u662f\u9519\u8bef\u7684\u6bd4\u8f83\u65b9\u5f0f\uff0c\u5e94\u4f7f\u7528 str.equals(&#8220;&#8221;)\u3002<\/p>\n<p>\u9009\u9879 d\uff1astr.equals(&#8220;&#8221;) || str.length() == 0\uff0c\u5c06 null \u5224\u65ad\u653e\u5728\u4e86\u9519\u8bef\u7684\u987a\u5e8f\u4e2d\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u6b63\u786e\u7684\u7b54\u6848\u662f a\uff0c\u56e0\u4e3a\u5b83\u63d0\u4f9b\u4e86\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\u7684\u53ef\u9760\u65b9\u6cd5\u3002<\/p>\n<p>\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300aJava\u9762\u8bd5\u9898\uff1a\u5982\u4f55\u6b63\u786e\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u4e3a\u7a7a\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":"<p>Java\u9762\u8bd5\u9898\uff1a\u5982\u4f55\u6b63\u786e\u5224\u65ad\u5b57\u7b26&#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-203911","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203911","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=203911"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203911\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203911"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203911"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203911"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}