{"id":6297,"date":"2024-08-12T19:01:01","date_gmt":"2024-08-12T11:01:01","guid":{"rendered":""},"modified":"2024-08-12T19:01:01","modified_gmt":"2024-08-12T11:01:01","slug":"\u94f6\u884cjava\u5916\u5305\u5458\u5de5\u503c\u5f97\u53bb\u5417_\u94f6\u884c\u5916\u5305java\u7d2f\u5417","status":"publish","type":"post","link":"https:\/\/mushiming.com\/6297.html","title":{"rendered":"\u94f6\u884cjava\u5916\u5305\u5458\u5de5\u503c\u5f97\u53bb\u5417_\u94f6\u884c\u5916\u5305java\u7d2f\u5417"},"content":{"rendered":"<p><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"display: none;\"> \n <path stroke-linecap=\"round\" d=\"M5,0 0,2.5 5,5z\" id=\"raphael-marker-block\" style=\"-webkit-tap-highlight-color: rgba(0, 0, 0, 0);\"><\/path> \n<\/svg> <\/p>\n<h3><strong>1.\u7b14\u8bd5\u5e38\u89c1\u7684\u95ee\u9898\uff1f<\/strong><\/h3>\n<p>\u9762\u8bd5\u5e38\u89c1\u7684\u95ee\u9898\u4e0a\u9762\u7ed9\u7684\u9762\u8bd5\u9898\u94fe\u63a5\u57fa\u672c\u90fd\u6709\u3002\u6211\u53ea\u63d0\u51e0\u70b9\uff1a<\/p>\n<ol>\n<li>\u5199SQL\uff1a\u5199SQL\u5f88\u5e38\u8003\u5bdfgroup by\u3001\u5185\u8fde\u63a5\u548c\u5916\u8fde\u63a5\u3002<\/li>\n<li>\u624b\u5199\u4ee3\u7801\uff1a\u624b\u5199\u4ee3\u7801\u4e00\u822c\u8003\u5355\u4f8b\u3001\u6392\u5e8f\u3001\u7ebf\u7a0b\u3001\u6d88\u8d39\u8005\u751f\u4ea7\u8005\u3002\u6211\u5efa\u8bae\u6392\u5e8f\u7b97\u6cd5\u9664\u4e86\u5192\u6ce1\u6392\u5e8f\uff0c\u6700\u597d\u8fd8\u80fd\u624b\u5199\u4e00\u79cd\u5176\u4ed6\u7684\u6392\u5e8f\u4ee3\u7801\u3002\u8bd5\u60f3\uff1a\u5982\u679c\u4e00\u822c\u9762\u8bd5\u8005\u90fd\u5199\u7684\u5192\u6ce1\u6392\u5e8f\uff0c\u800c\u4f60\u5199\u7684\u662f\u5feb\u901f\u6392\u5e8f\/\u5806\u6392\u5e8f\uff0c\u80af\u5b9a\u80fd\u7ed9\u9762\u8bd5\u5b98\u7559\u4e0b\u4e0d\u9519\u7684\u5370\u8c61\u3002<\/li>\n<\/ol>\n<h3><strong>2.\u9762\u8bd5\u6d41\u7a0b\uff1f<\/strong><\/h3>\n<ol>\n<li>\u8ba9\u4f60\u81ea\u6211\u4ecb\u7ecd<\/li>\n<li>\u95eeJava\u57fa\u7840\u77e5\u8bc6<\/li>\n<li>\u95ee\u9879\u76ee<\/li>\n<li>\u60c5\u666f\u95ee\u9898\uff0c\u4f8b\u5982\uff1a\u4f60\u7684\u4e00\u4e2a\u529f\u80fd\u4e0a\u4e86\u751f\u4ea7\u73af\u5883\u540e\uff0c\u670d\u52a1\u5668\u538b\u529b\u9aa4\u589e\uff0c\u8be5\u600e\u4e48\u6392\u67e5\u3002<\/li>\n<li>\u4f60\u6709\u4ec0\u4e48\u60f3\u95ee\u9762\u8bd5\u5b98\u7684<\/li>\n<\/ol>\n<h3><strong>3.\u9762\u8bd5\u5e38\u95ee\u7684\u77e5\u8bc6\u70b9\uff1f<\/strong><\/h3>\n<p><strong>1\uff09\u96c6\u5408\u76f8\u5173\u95ee\u9898\uff08\u5fc5\u95ee\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>HashMap\u3001LinkedHashMap\u3001ConcurrentHashMap\u3001ArrayList\u3001LinkedList\u7684\u5e95\u5c42\u5b9e\u73b0\u3002<\/li>\n<li>HashMap\u548cHashtable\u7684\u533a\u522b\u3002<\/li>\n<li>ArrayList\u3001LinkedList\u3001Vector\u7684\u533a\u522b\u3002<\/li>\n<li>HashMap\u548cConcurrentHashMap\u7684\u533a\u522b\u3002<\/li>\n<li>HashMap\u548cLinkedHashMap\u7684\u533a\u522b\u3002<\/li>\n<li>HashMap\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\u5417\u3002<\/li>\n<li>ConcurrentHashMap\u662f\u600e\u4e48\u5b9e\u73b0\u7ebf\u7a0b\u5b89\u5168\u7684\u3002<\/li>\n<\/ul>\n<p><strong>2\uff09\u591a\u7ebf\u7a0b\u5e76\u53d1\u76f8\u5173\u95ee\u9898\uff08\u5fc5\u95ee\uff09\uff1a<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"\u94f6\u884cjava\u5916\u5305\u5458\u5de5\u503c\u5f97\u53bb\u5417_\u94f6\u884c\u5916\u5305java\u7d2f\u54171.\u7b14\u8bd5\u5e38\u89c1\u7684\u95ee\u9898\uff1f\u9762\u8bd5\u5e38\u89c1\u7684\u95ee\u9898\u4e0a\u9762\u7ed9\u7684\u9762\u8bd5\u9898\u94fe\u63a5\u57fa\u672c\u90fd\u6709","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"_links":{"self":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/6297"}],"collection":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/comments?post=6297"}],"version-history":[{"count":0,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/posts\/6297\/revisions"}],"wp:attachment":[{"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/media?parent=6297"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/categories?post=6297"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mushiming.com\/wp-json\/wp\/v2\/tags?post=6297"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}