{"id":202792,"date":"2025-05-22T11:52:33","date_gmt":"2025-05-22T03:52:33","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202792\/"},"modified":"2025-05-22T11:52:33","modified_gmt":"2025-05-22T03:52:33","slug":"java%e5%87%bd%e6%95%b0%e5%bc%8f%e6%8e%a5%e5%8f%a3%e5%9c%a8%e4%bb%a3%e7%a0%81%e7%94%9f%e6%88%90%e5%92%8c%e8%87%aa%e5%ae%9a%e4%b9%89%e6%93%8d%e4%bd%9c%e4%b8%ad%e7%9a%84%e7%81%b5%e6%b4%bb%e8%bf%90","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202792\/","title":{"rendered":"Java\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u4ee3\u7801\u751f\u6210\u548c\u81ea\u5b9a\u4e49\u64cd\u4f5c\u4e2d\u7684\u7075\u6d3b\u8fd0\u7528\uff1f"},"content":{"rendered":"

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

Java\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u4ee3\u7801\u751f\u6210\u548c\u81ea\u5b9a\u4e49\u64cd\u4f5c\u4e2d\u7684\u7075\u6d3b\u8fd0\u7528\uff1f<\/h1>\n

\u5bf9\u4e8e\u4e00\u4e2a\u6587\u7ae0\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u7262\u56fa\u624e\u5b9e\u7684\u57fa\u7840\u662f\u5341\u5206\u91cd\u8981\u7684\uff0c\u5c31\u6765\u5e26\u5927\u5bb6\u4e00\u70b9\u70b9\u7684\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u70b9\u3002\u4eca\u5929\u672c\u7bc7\u6587\u7ae0\u5e26\u5927\u5bb6\u4e86\u89e3\u300aJava\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u4ee3\u7801\u751f\u6210\u548c\u81ea\u5b9a\u4e49\u64cd\u4f5c\u4e2d\u7684\u7075\u6d3b\u8fd0\u7528\uff1f\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e86\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u5feb\u70b9\u6536\u85cf\u8d77\u6765\u5427\uff0c\u5426\u5219\u9700\u8981\u65f6\u5c31\u627e\u4e0d\u5230\u4e86\uff01<\/p>\n

Java \u51fd\u6570\u5f0f\u63a5\u53e3\u63d0\u4f9b\u4e86\u4ee3\u7801\u751f\u6210\u548c\u81ea\u5b9a\u4e49\u64cd\u4f5c\u7684\u7075\u6d3b\u6027\u3002\u5b83\u4eec\u53ef\u7528\u4e8e\uff1a\u751f\u6210\u4ee3\u7801\u7247\u6bb5\uff08\u4f8b\u5982 Lambda \u8868\u8fbe\u5f0f\uff09\u3002\u5b9a\u4e49\u81ea\u5b9a\u4e49\u64cd\u4f5c\uff0c\u7528\u4e8e\u6d41\u5904\u7406\u4e2d\u91cd\u7528\u548c\u7ec4\u5408\u590d\u6742\u7684\u903b\u8f91\u3002<\/p>\n

<\/p>\n

Java \u51fd\u6570\u5f0f\u63a5\u53e3\uff1a\u4ee3\u7801\u751f\u6210\u4e0e\u81ea\u5b9a\u4e49\u64cd\u4f5c\u7684\u7075\u6d3b\u8fd0\u7528<\/strong><\/p>\n

\u7b80\u4ecb<\/strong><\/p>\n

Java \u51fd\u6570\u5f0f\u63a5\u53e3\u662f\u4e00\u79cd\u53ea\u5305\u542b\u4e00\u4e2a\u62bd\u8c61\u65b9\u6cd5\u7684\u63a5\u53e3\u3002\u5b83\u4eec\u5728 Java 8 \u4e2d\u5f15\u5165\uff0c\u4e3a\u54cd\u5e94\u5f0f\u7f16\u7a0b\u548c\u6d41\u5904\u7406\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u5de5\u5177\uff0c\u5e76\u4f7f\u4ee3\u7801\u751f\u6210\u548c\u81ea\u5b9a\u4e49\u64cd\u4f5c\u53d8\u5f97\u66f4\u52a0\u7075\u6d3b\u3002<\/p>\n

\u4ee3\u7801\u751f\u6210<\/strong><\/p>\n

\u51fd\u6570\u5f0f\u63a5\u53e3\u53ef\u7528\u4e8e\u751f\u6210\u4ee3\u7801\u7247\u6bb5\uff0c\u4f8b\u5982 Lambda \u8868\u8fbe\u5f0f\u6216\u65b9\u6cd5\u5f15\u7528\u3002\u8fd9\u5728\u6784\u5efa\u52a8\u6001\u7cfb\u7edf\u6216\u81ea\u52a8\u751f\u6210\u4ee3\u7801\u65f6\u5f88\u6709\u7528\u3002\u4f8b\u5982\uff1a<\/p>\n

Function<String, Integer> stringToInteger = Integer::parseInt;\nint result = stringToInteger.apply(\"123\"); \/\/ result = 123<\/pre>\n
\u81ea\u5b9a\u4e49\u64cd\u4f5c<\/strong><\/p>\n
\u51fd\u6570\u5f0f\u63a5\u53e3\u8fd8\u5141\u8bb8\u60a8\u5b9a\u4e49\u81ea\u5b9a\u4e49\u64cd\u4f5c\uff0c\u8fd9\u4e9b\u64cd\u4f5c\u53ef\u4ee5\u5728\u6d41\u5904\u7406\u4e2d\u4f7f\u7528\u3002\u901a\u8fc7\u5c06\u590d\u6742\u7684\u903b\u8f91\u5c01\u88c5\u5230\u51fd\u6570\u5f0f\u63a5\u53e3\u4e2d\uff0c\u60a8\u53ef\u4ee5\u8f7b\u677e\u5730\u5bf9\u5176\u8fdb\u884c\u91cd\u7528\u548c\u7ec4\u5408\u3002\u4f8b\u5982\uff1a<\/p>\n
Predicate<Integer> isEven = n -> n % 2 == 0;\nList<Integer> evenNumbers = numbers.stream().filter(isEven).toList();<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u4ee3\u7801\u751f\u6210\uff1a\u4f7f\u7528 Lambda \u8868\u8fbe\u5f0f\u52a8\u6001\u6784\u5efa\u67e5\u8be2<\/strong><\/p>\n
Function<String, String> buildQuery = name -> \"SELECT * FROM users WHERE name = '\" + name + \"'\";\nString query = buildQuery.apply(\"John\");<\/pre>\n
\u81ea\u5b9a\u4e49\u64cd\u4f5c\uff1a\u81ea\u5b9a\u4e49 Sort \u51fd\u6570<\/strong><\/p>\n
Comparator<String> caseInsensitiveSort = String::compareToIgnoreCase;\nList<String> sortedStrings = strings.stream().sorted(caseInsensitiveSort).toList();<\/pre>\n
\u4f18\u70b9<\/strong><\/p>\n
\u4f7f\u7528 Java \u51fd\u6570\u5f0f\u63a5\u53e3\u63d0\u4f9b\u4e86\u4e00\u4e9b\u4f18\u70b9\uff1a<\/p>\n
    \n
  • \u4ee3\u7801\u7b80\u6d01\u6027\uff1aLambda \u8868\u8fbe\u5f0f\u548c\u65b9\u6cd5\u5f15\u7528\u6bd4\u533f\u540d\u5185\u90e8\u7c7b\u66f4\u7b80\u6d01\u3001\u66f4\u6613\u8bfb\u3002<\/li>\n
  • \u63d0\u9ad8\u53ef\u91cd\u7528\u6027\uff1a\u51fd\u6570\u5f0f\u63a5\u53e3\u53ef\u4ee5\u8f7b\u677e\u91cd\u7528\uff0c\u4ece\u800c\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u6d4b\u8bd5\u6027\u3002<\/li>\n
  • \u589e\u5f3a\u7075\u6d3b\u6027\uff1a\u51fd\u6570\u5f0f\u63a5\u53e3\u4f7f\u60a8\u80fd\u591f\u5b9a\u4e49\u548c\u7ec4\u5408\u81ea\u5b9a\u4e49\u64cd\u4f5c\uff0c\u4ee5\u6ee1\u8db3\u7279\u5b9a\u9700\u6c42\u3002<\/li>\n<\/ul>\n
    \u4ee5\u4e0a\u5c31\u662f\u300aJava\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u4ee3\u7801\u751f\u6210\u548c\u81ea\u5b9a\u4e49\u64cd\u4f5c\u4e2d\u7684\u7075\u6d3b\u8fd0\u7528\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8ejava,\u51fd\u6570\u5f0f\u63a5\u53e3\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    Java\u51fd\u6570\u5f0f\u63a5\u53e3\u5728\u4ee3\u7801\u751f\u6210\u548c\u81ea...<\/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-202792","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202792","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=202792"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202792\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202792"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202792"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}