{"id":646,"date":"2022-11-20T01:37:09","date_gmt":"2023-01-07T14:10:14","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/index.php\/2023\/11\/30\/java%e7%b1%bb%e6%89%be%e4%b8%8d%e5%88%b0%e5%bc%82%e5%b8%b8-java-lang-classnotfoundexception\/"},"modified":"2025-08-03T00:45:33","modified_gmt":"2025-08-02T16:45:33","slug":"java%e7%b1%bb%e6%89%be%e4%b8%8d%e5%88%b0%e5%bc%82%e5%b8%b8-java-lang-classnotfoundexception","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/java%e7%b1%bb%e6%89%be%e4%b8%8d%e5%88%b0%e5%bc%82%e5%b8%b8-java-lang-classnotfoundexception\/","title":{"rendered":"\u5982\u4f55\u89e3\u51b3Java\u7c7b\u627e\u4e0d\u5230\u5f02\u5e38(ClassNotFoundException)\uff1a\u5b8c\u6574\u6307\u5357"},"content":{"rendered":"<h2>Java\u4e2d\u7684ClassNotFoundException<\/h2>\n<ul class=\"post-ul\">\n<li>\u5f53\u5e94\u7528\u7a0b\u5e8f\u5c1d\u8bd5\u52a0\u8f7d\u4e00\u4e2a\u7c7b\uff0c\u4f46\u7c7b\u52a0\u8f7d\u5668\uff08Classloader\uff09\u65e0\u6cd5\u5728\u7c7b\u8def\u5f84\uff08classpath\uff09\u4e2d\u627e\u5230\u8be5\u7c7b\u65f6\uff0c\u5c31\u4f1a\u53d1\u751fJava ClassNotFoundException\u5f02\u5e38\u3002<\/li>\n<li>java.lang.ClassNotFoundException\u7684\u5e38\u89c1\u539f\u56e0\u662f\u4f7f\u7528Class.forName\u6216ClassLoader.loadClass\u65b9\u6cd5\u901a\u8fc7\u4f20\u9012\u7c7b\u7684\u5b57\u7b26\u4e32\u540d\u79f0\u6765\u52a0\u8f7d\u7c7b\uff0c\u4f46\u8be5\u7c7b\u5728\u7c7b\u8def\u5f84\u4e2d\u672a\u627e\u5230\u3002<\/li>\n<li>ClassNotFoundException\u662f\u4e00\u4e2a\u53d7\u68c0\u5f02\u5e38\uff08checked exception\uff09\uff0c\u56e0\u6b64\u5fc5\u987b\u88ab\u6355\u83b7\u6216\u629b\u7ed9\u8c03\u7528\u8005\u3002<\/li>\n<li>ClassNotFoundException\u603b\u662f\u5728\u8fd0\u884c\u65f6\u53d1\u751f\uff0c\u56e0\u4e3a\u6211\u4eec\u662f\u4f7f\u7528\u7c7b\u52a0\u8f7d\u5668\u95f4\u63a5\u52a0\u8f7d\u7c7b\u3002Java\u7f16\u8bd1\u5668\u65e0\u6cd5\u77e5\u9053\u7c7b\u5728\u8fd0\u884c\u65f6\u662f\u5426\u4f1a\u5b58\u5728\u4e8e\u7c7b\u8def\u5f84\u4e2d\u3002<\/li>\n<li>ClassNotFoundException\u6700\u5e38\u89c1\u7684\u4f8b\u5b50\u4e4b\u4e00\u662f\u5f53\u6211\u4eec\u5c1d\u8bd5\u4f7f\u7528Class.forName\u52a0\u8f7dJDBC\u9a71\u52a8\u7a0b\u5e8f\uff0c\u4f46\u5fd8\u8bb0\u5c06\u5176JAR\u6587\u4ef6\u6dfb\u52a0\u5230\u7c7b\u8def\u5f84\u4e2d\u3002<\/li>\n<\/ul>\n<h2>Java \u7c7b\u627e\u4e0d\u5230\u5f02\u5e38\u793a\u4f8b<\/h2>\n<p>\u6211\u4eec\u6765\u770b\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\uff0c\u5176\u4e2d\u6211\u4eec\u5c06\u4f1a\u5f97\u5230ClassNotFoundException\u5f02\u5e38\u3002<\/p>\n<pre class=\"post-pre\"><code>package com.Olivia.exceptions;\r\n\r\npublic class DataTest {\r\n\r\n  public static void main(String[] args) {\r\n    try {\r\n      Class.forName(\"com.Olivia.MyInvisibleClass\");\r\n\r\n      ClassLoader.getSystemClassLoader().loadClass(\"com.Olivia.MyInvisibleClass\");\r\n\r\n      ClassLoader.getPlatformClassLoader().loadClass(\"com.Olivia.MyInvisibleClass\");\r\n    } catch (ClassNotFoundException e) {\r\n      e.printStackTrace();\r\n    }\r\n  }\r\n\r\n}\r\n<\/code><\/pre>\n<p>\u8bf7\u6ce8\u610f\uff0ccom.Olivia.MyInvisibleClass\u5e76\u4e0d\u5b58\u5728\uff0c\u6240\u4ee5\u5f53\u6211\u4eec\u6267\u884c\u4ee5\u4e0a\u7a0b\u5e8f\u65f6\uff0c\u4f1a\u5f97\u5230\u4ee5\u4e0b\u5f02\u5e38\u5806\u6808\u8ddf\u8e2a\u3002<\/p>\n<pre class=\"post-pre\"><code>java.lang.ClassNotFoundException: com.Olivia.MyInvisibleClass\r\n\tat java.base\/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)\r\n\tat java.base\/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:185)\r\n\tat java.base\/java.lang.ClassLoader.loadClass(ClassLoader.java:496)\r\n\tat java.base\/java.lang.Class.forName0(Native Method)\r\n\tat java.base\/java.lang.Class.forName(Class.java:292)\r\n\tat com.Olivia.exceptions.DataTest.main(DataTest.java:7)\r\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c\u6240\u6709\u4e09\u4e2a\u8bed\u53e5\u90fd\u4f1a\u5f15\u53d1java.lang.ClassNotFoundException\u5f02\u5e38\u3002<\/p>\n<h2>\u5982\u4f55\u89e3\u51b3ClassNotFoundException<\/h2>\n<p>\u4fee\u590dClassNotFoundException\u975e\u5e38\u5bb9\u6613\uff0c\u56e0\u4e3a\u5f02\u5e38\u5806\u6808\u4e2d\u660e\u786e\u6307\u5b9a\u4e86\u627e\u4e0d\u5230\u7684\u7c7b\u3002\u53ea\u9700\u68c0\u67e5\u7c7b\u8def\u5f84\uff08classpath\uff09\u8bbe\u7f6e\uff0c\u5e76\u786e\u4fdd\u7c7b\u5728\u8fd0\u884c\u65f6\u5b58\u5728\u5373\u53ef\u3002<\/p>\n<h2>\u7c7b\u627e\u4e0d\u5230\u5f02\u5e38 vs \u7c7b\u5b9a\u4e49\u672a\u627e\u5230\u9519\u8bef<\/h2>\n<p>\u5f53\u4e00\u4e2a\u7c7b\u5728\u8fd0\u884c\u65f6\u627e\u4e0d\u5230\u65f6\uff0cNoClassDefFoundError\uff08\u7c7b\u5b9a\u4e49\u672a\u627e\u5230\u9519\u8bef\uff09\u662f\u4e00\u4e2a\u8fd0\u884c\u65f6\u9519\u8bef\u3002\u5b83\u4e0eClassNotFoundException\uff08\u7c7b\u627e\u4e0d\u5230\u5f02\u5e38\uff09\u975e\u5e38\u76f8\u4f3c\u3002\u5728Java NoClassDefFoundError\u4e2d\u4e86\u89e3\u66f4\u591a\u3002\u53c2\u8003\uff1aAPI\u6587\u6863<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java\u4e2d\u7684ClassNotFoundException \u5f53\u5e94\u7528\u7a0b\u5e8f\u5c1d\u8bd5\u52a0\u8f7d\u4e00\u4e2a\u7c7b\uff0c\u4f46\u7c7b\u52a0\u8f7d\u5668\uff08Classlo [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1806,1805,1808,180,1807],"class_list":["post-646","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-classnotfoundexception","tag-java"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u5982\u4f55\u89e3\u51b3Java\u7c7b\u627e\u4e0d\u5230\u5f02\u5e38(ClassNotFoundException)\uff1a\u5b8c\u6574\u6307\u5357 - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" 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