{"id":250,"date":"2023-12-07T09:07:47","date_gmt":"2023-12-07T01:07:47","guid":{"rendered":"http:\/\/ericw.top\/?p=250"},"modified":"2023-12-07T09:56:13","modified_gmt":"2023-12-07T01:56:13","slug":"java%e5%9f%ba%e7%a1%80-%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"http:\/\/ericw.top\/?p=250","title":{"rendered":"Java\u57fa\u7840 \u5f02\u5e38\u5904\u7406"},"content":{"rendered":"<h2 id=\"toc-0\">\u4ec0\u4e48\u662f\u5f02\u5e38\uff1f<\/h2>\n<p>\u5728 Java \u4e2d\uff0c\u5f02\u5e38\uff08Exception\uff09\u662f\u4e00\u79cd\u5728\u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4f1a\u53d1\u751f\u7684\u9519\u8bef\u6216\u5f02\u5e38\u60c5\u51b5\u3002\u5f02\u5e38\u53ef\u4ee5\u8868\u793a\u5404\u79cd\u95ee\u9898\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>\u7528\u6237\u8f93\u5165\u4e86\u65e0\u6548\u7684\u6570\u636e\u3002<\/li>\n<li>\u6587\u4ef6\u4e0d\u5b58\u5728\u6216\u65e0\u6cd5\u8bbf\u95ee\u3002<\/li>\n<li>\u7f51\u7edc\u8fde\u63a5\u4e2d\u65ad\u3002<\/li>\n<li>\u6570\u7ec4\u8bbf\u95ee\u8d8a\u754c\u3002<\/li>\n<li>\u7a7a\u6307\u9488\u5f15\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"toc-1\">\u5f02\u5e38\u7684\u5206\u7c7b<\/h2>\n<p>Java\u5f02\u5e38\u53ef\u4ee5\u5206\u4e3a\u4e24\u5927\u7c7b\uff1a<\/p>\n<ol>\n<li><strong>\u53ef\u68c0\u67e5\u5f02\u5e38\uff1a<\/strong>\u8fd9\u4e9b\u5f02\u5e38\u662f\u5728\u7f16\u8bd1\u65f6\u7531\u7f16\u8bd1\u5668\u5f3a\u5236\u68c0\u67e5\u7684\uff0c\u5fc5\u987b\u5728\u4ee3\u7801\u4e2d\u660e\u786e\u5904\u7406\u6216\u629b\u51fa\u3002\u5e38\u89c1\u7684\u53ef\u68c0\u67e5\u5f02\u5e38\u5305\u62ec <code class=\"prettyprint\" >IOException<\/code>\u3001<code class=\"prettyprint\" >SQLException<\/code> \u7b49\u3002\u5904\u7406\u53ef\u68c0\u67e5\u5f02\u5e38\u7684\u65b9\u5f0f\u901a\u5e38\u662f\u4f7f\u7528 <code class=\"prettyprint\" >try-catch<\/code> \u5757\u6765\u6355\u83b7\u548c\u5904\u7406\u5f02\u5e38\u3002<\/li>\n<li><strong>\u4e0d\u53ef\u68c0\u67e5\u5f02\u5e38\uff1a<\/strong>\u4e5f\u79f0\u4e3a\u8fd0\u884c\u65f6\u5f02\u5e38\uff08RuntimeException\uff09\uff0c\u8fd9\u4e9b\u5f02\u5e38\u901a\u5e38\u662f\u7531\u7a0b\u5e8f\u4e2d\u7684\u9519\u8bef\u6216\u903b\u8f91\u95ee\u9898\u5f15\u8d77\u7684\uff0c\u4e0d\u9700\u8981\u5728\u4ee3\u7801\u4e2d\u663e\u5f0f\u6355\u83b7\u6216\u5904\u7406\u3002\u5e38\u89c1\u7684\u4e0d\u53ef\u68c0\u67e5\u5f02\u5e38\u5305\u62ec NullPointerException\u3001ArrayIndexOutOfBoundsException\u3001ArithmeticException \u7b49\u3002<\/li>\n<\/ol>\n<h2 id=\"toc-2\">\u5f02\u5e38\u5904\u7406\u65b9\u5f0f<\/h2>\n<p>\u4e3a\u4e86\u5904\u7406\u5f02\u5e38\uff0cJava\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5173\u952e\u5b57\u548c\u673a\u5236\uff1a<\/p>\n<p><strong>try-catch \u5757\uff1atry \u7528\u4e8e\u5305\u88c5\u53ef\u80fd\u5f15\u53d1\u5f02\u5e38\u7684\u4ee3\u7801\u5757\uff0c\u800c catch \u7528\u4e8e\u6355\u83b7\u5e76\u5904\u7406\u5f02\u5e38\u3002\u4f60\u53ef\u4ee5\u5728 catch \u5757\u4e2d\u7f16\u5199\u5904\u7406\u5f02\u5e38\u7684\u4ee3\u7801\u3002\u4f8b\u5982\uff1a<\/strong><\/p>\n<pre><code class=\"prettyprint\"  class=\"language-java\">try {\n    \/\/ \u53ef\u80fd\u5f15\u53d1\u5f02\u5e38\u7684\u4ee3\u7801\n} catch (ExceptionType e) {\n    \/\/ \u5904\u7406\u5f02\u5e38\u7684\u4ee3\u7801\n}<\/code><\/pre>\n<p><strong>finally \u5757\uff1afinally \u7528\u4e8e\u5305\u88c5\u4e00\u6bb5\u65e0\u8bba\u662f\u5426\u53d1\u751f\u5f02\u5e38\u90fd\u9700\u8981\u6267\u884c\u7684\u4ee3\u7801\u3002\u4f8b\u5982\uff1a<\/strong><\/p>\n<pre><code class=\"prettyprint\"  class=\"language-java\">try {\n    \/\/ \u53ef\u80fd\u5f15\u53d1\u5f02\u5e38\u7684\u4ee3\u7801\n} catch (ExceptionType e) {\n    \/\/ \u5904\u7406\u5f02\u5e38\u7684\u4ee3\u7801\n} finally {\n    \/\/ \u65e0\u8bba\u662f\u5426\u53d1\u751f\u5f02\u5e38\u90fd\u4f1a\u6267\u884c\u7684\u4ee3\u7801\n}<\/code><\/pre>\n<p><strong>throws \u5173\u952e\u5b57\uff1athrows \u7528\u4e8e\u5728\u65b9\u6cd5\u7b7e\u540d\u4e2d\u58f0\u660e\u65b9\u6cd5\u53ef\u80fd\u629b\u51fa\u7684\u5f02\u5e38\u3002\u8fd9\u544a\u8bc9\u8c03\u7528\u8005\u65b9\u6cd5\u53ef\u80fd\u5f15\u53d1\u5f02\u5e38\uff0c\u9700\u8981\u8c03\u7528\u8005\u8fdb\u884c\u5904\u7406\u6216\u7ee7\u7eed\u629b\u51fa\u3002\u4f8b\u5982\uff1a<\/strong><\/p>\n<pre><code class=\"prettyprint\"  class=\"language-java\">public void myMethod() throws MyException {\n    \/\/ \u53ef\u80fd\u5f15\u53d1\u5f02\u5e38\u7684\u4ee3\u7801\n}<\/code><\/pre>\n<p><strong>throw \u5173\u952e\u5b57\uff1athrow \u7528\u4e8e\u624b\u52a8\u629b\u51fa\u5f02\u5e38\u3002\u4f60\u53ef\u4ee5\u4f7f\u7528 throw \u6765\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\u5e76\u5c06\u5176\u629b\u51fa\u3002\u4f8b\u5982\uff1a<\/strong><\/p>\n<pre><code class=\"prettyprint\"  class=\"language-java\">\nif (someCondition) {\n    throw new MyException(&quot;This is a custom exception.&quot;);\n}\n<\/code><\/pre>\n<h2 id=\"toc-3\">\u5e38\u89c1\u7684\u5f02\u5e38\u7c7b<\/h2>\n<p>Java \u63d0\u4f9b\u4e86\u8bb8\u591a\u5185\u7f6e\u7684\u5f02\u5e38\u7c7b\uff0c\u4ee5\u6ee1\u8db3\u4e0d\u540c\u7684\u5f02\u5e38\u60c5\u51b5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u89c1\u7684\u5f02\u5e38\u7c7b\uff1a<\/p>\n<ul>\n<li>NullPointerException\uff1a\u5f53\u8bd5\u56fe\u8bbf\u95ee\u4e00\u4e2a\u7a7a\u5bf9\u8c61\u7684\u6210\u5458\u65f6\u5f15\u53d1\u3002<\/li>\n<li>ArrayIndexOutOfBoundsException\uff1a\u5f53\u5c1d\u8bd5\u8bbf\u95ee\u6570\u7ec4\u4e2d\u4e0d\u5b58\u5728\u7684\u7d22\u5f15\u65f6\u5f15\u53d1\u3002<\/li>\n<li>ArithmeticException\uff1a\u5f53\u8fdb\u884c\u9664\u4ee5\u96f6\u7684\u7b97\u672f\u8fd0\u7b97\u65f6\u5f15\u53d1\u3002<\/li>\n<li>IOException\uff1a\u7528\u4e8e\u5904\u7406\u8f93\u5165\u8f93\u51fa\u64cd\u4f5c\u4e2d\u7684\u5f02\u5e38\uff0c\u5982\u6587\u4ef6\u8bfb\u5199\u3002<\/li>\n<li>SQLException\uff1a\u7528\u4e8e\u5904\u7406\u6570\u636e\u5e93\u64cd\u4f5c\u4e2d\u7684\u5f02\u5e38\u3002<\/li>\n<li>NumberFormatException\uff1a\u5f53\u5b57\u7b26\u4e32\u65e0\u6cd5\u89e3\u6790\u4e3a\u6570\u5b57\u65f6\u5f15\u53d1\u3002<\/li>\n<\/ul>\n<h2 id=\"toc-4\">\u5f02\u5e38\u5904\u7406\u7684\u6700\u4f73\u5b9e\u8df5<\/h2>\n<p>\u5728\u5904\u7406\u5f02\u5e38\u65f6\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u6700\u4f73\u5b9e\u8df5\uff1a<\/p>\n<ol>\n<li>\n<p>\u6355\u83b7\u7cbe\u786e\u7684\u5f02\u5e38\uff1a\u5c3d\u53ef\u80fd\u7cbe\u786e\u5730\u6355\u83b7\u5f02\u5e38\uff0c\u800c\u4e0d\u662f\u6355\u83b7\u901a\u7528\u7684 Exception\u3002\u8fd9\u6709\u52a9\u4e8e\u66f4\u597d\u5730\u7406\u89e3\u548c\u5904\u7406\u5f02\u5e38\u60c5\u51b5\u3002<\/p>\n<\/li>\n<li>\n<p>\u907f\u514d\u7a7a\u7684 catch \u5757\uff1a\u907f\u514d\u5728 catch \u5757\u4e2d\u4ec0\u4e48\u90fd\u4e0d\u505a\u6216\u53ea\u662f\u7b80\u5355\u5730\u6253\u5370\u5f02\u5e38\u4fe1\u606f\u3002\u6839\u636e\u5177\u4f53\u60c5\u51b5\uff0c\u53ef\u4ee5\u8bb0\u5f55\u5f02\u5e38\u3001\u56de\u6eda\u4e8b\u52a1\u3001\u5173\u95ed\u8d44\u6e90\u7b49\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528\u81ea\u5b9a\u4e49\u5f02\u5e38\uff1a\u5bf9\u4e8e\u7279\u5b9a\u7684\u4e1a\u52a1\u903b\u8f91\u95ee\u9898\uff0c\u53ef\u4ee5\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\u7c7b\uff0c\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u7ef4\u62a4\u6027\u3002<\/p>\n<\/li>\n<li>\n<p>\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u68c0\u67e5\u5f02\u5e38\uff1a\u4e0d\u8981\u6ee5\u7528\u68c0\u67e5\u5f02\u5e38\u3002\u53ea\u6709\u5728\u9700\u8981\u65f6\u624d\u58f0\u660e\u548c\u6355\u83b7\u68c0\u67e5\u5f02\u5e38\u3002<\/p>\n<\/li>\n<li>\n<p>\u5904\u7406\u5f02\u5e38\u7684\u5c42\u6b21\uff1a\u5728\u4ee3\u7801\u7684\u9002\u5f53\u5c42\u6b21\u8fdb\u884c\u5f02\u5e38\u5904\u7406\uff0c\u4e0d\u8981\u8ba9\u5f02\u5e38\u4f20\u64ad\u5230\u4e0d\u5408\u9002\u7684\u5c42\u6b21\u3002<\/p>\n<\/li>\n<li>\n<p>\u5173\u95ed\u8d44\u6e90\uff1a\u5982\u679c\u4f60\u5728\u4ee3\u7801\u4e2d\u6253\u5f00\u4e86\u6587\u4ef6\u3001\u6570\u636e\u5e93\u8fde\u63a5\u6216\u5176\u4ed6\u8d44\u6e90\uff0c\u52a1\u5fc5\u5728\u4e0d\u518d\u9700\u8981\u5b83\u4eec\u65f6\u5173\u95ed\u8fd9\u4e9b\u8d44\u6e90\u3002\u901a\u5e38\u53ef\u4ee5\u4f7f\u7528 finally \u5757\u6765\u786e\u4fdd\u8d44\u6e90\u7684\u5173\u95ed\u3002<\/p>\n<\/li>\n<li>\n<p>\u5f02\u5e38\u94fe\uff1a\u5728\u6355\u83b7\u5e76\u5904\u7406\u5f02\u5e38\u65f6\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u5f02\u5e38\u94fe\u7684\u65b9\u5f0f\uff0c\u5c06\u539f\u59cb\u5f02\u5e38\u5305\u88c5\u5728\u65b0\u7684\u5f02\u5e38\u4e2d\uff0c\u4ee5\u4fdd\u7559\u539f\u59cb\u5f02\u5e38\u4fe1\u606f\u5e76\u63d0\u4f9b\u66f4\u591a\u4e0a\u4e0b\u6587\u3002\u8fd9\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u5b9e\u73b0\uff1a<\/p>\n<\/li>\n<\/ol>\n<pre><code class=\"prettyprint\"  class=\"language-java\">try {\n    \/\/ \u53ef\u80fd\u5f15\u53d1\u5f02\u5e38\u7684\u4ee3\u7801\n} catch (ExceptionType1 e1) {\n    \/\/ \u5904\u7406\u5f02\u5e38\u7684\u4ee3\u7801\n    throw new CustomException(&quot;Additional information&quot;, e1);\n} catch (ExceptionType2 e2) {\n    \/\/ \u5904\u7406\u53e6\u4e00\u79cd\u5f02\u5e38\u7684\u4ee3\u7801\n    throw new AnotherCustomException(&quot;Additional information&quot;, e2);\n}\n<\/code><\/pre>\n<ol start=\"8\">\n<li>\n<p>\u4e0d\u8981\u5ffd\u7565\u5f02\u5e38\uff1a\u907f\u514d\u5ffd\u7565\u5f02\u5e38\uff0c\u5373\u4e0d\u8981\u5728 catch \u5757\u4e2d\u4ec0\u4e48\u90fd\u4e0d\u505a\u6216\u7b80\u5355\u5730\u6253\u5370\u5f02\u5e38\u4fe1\u606f\u3002\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u95ee\u9898\u88ab\u63a9\u76d6\uff0c\u96be\u4ee5\u8bca\u65ad\u3002<\/p>\n<\/li>\n<li>\n<p>\u53ca\u65f6\u5904\u7406\u5f02\u5e38\uff1a\u5728\u4ee3\u7801\u4e2d\u53ca\u65f6\u5904\u7406\u5f02\u5e38\uff0c\u4e0d\u8981\u5c06\u5f02\u5e38\u4fe1\u606f\u5ef6\u8fdf\u5230\u540e\u7eed\u7684\u64cd\u4f5c\u4e2d\u3002\u53ca\u65f6\u7684\u5f02\u5e38\u5904\u7406\u6709\u52a9\u4e8e\u66f4\u65e9\u5730\u53d1\u73b0\u548c\u89e3\u51b3\u95ee\u9898\u3002<\/p>\n<\/li>\n<li>\n<p>\u907f\u514d\u5faa\u73af\u5185\u7684\u5f02\u5e38\uff1a\u5728\u5faa\u73af\u4e2d\u5f15\u53d1\u5f02\u5e38\u53ef\u80fd\u4f1a\u5bfc\u81f4\u6027\u80fd\u95ee\u9898\uff0c\u56e0\u6b64\u5e94\u8be5\u5c3d\u91cf\u907f\u514d\u5728\u5faa\u73af\u5185\u90e8\u5f15\u53d1\u5f02\u5e38\u3002<\/p>\n<\/li>\n<\/ol>\n<h2 id=\"toc-5\">\u5f02\u5e38\u5904\u7406\u793a\u4f8b<\/h2>\n<pre><code class=\"prettyprint\"  class=\"language-java\">public class ExceptionHandlingExample {\n    public static void main(String[] args) {\n        try {\n            int result = divide(10, 0);\n            System.out.println(&quot;Result: &quot; + result);\n        } catch (ArithmeticException e) {\n            System.err.println(&quot;Error: Division by zero.&quot;);\n        }\n    }\n\n    public static int divide(int dividend, int divisor) {\n        if (divisor == 0) {\n            throw new ArithmeticException(&quot;Division by zero is not allowed.&quot;);\n        }\n        return dividend \/ divisor;\n    }\n}\n<\/code><\/pre>\n<p>\u5728\u4e0a\u8ff0\u793a\u4f8b\u4e2d\uff0c<code class=\"prettyprint\" >divide<\/code> \u65b9\u6cd5\u53ef\u80fd\u5f15\u53d1 <code class=\"prettyprint\" >ArithmeticException<\/code> \u5f02\u5e38\uff0c\u6211\u4eec\u5728 <code class=\"prettyprint\" >main<\/code> \u65b9\u6cd5\u4e2d\u4f7f\u7528 <code class=\"prettyprint\" >try-catch<\/code> \u5757\u6765\u6355\u83b7\u548c\u5904\u7406\u8fd9\u4e2a\u5f02\u5e38\u3002<\/p>\n<h2 id=\"toc-6\">\u603b\u7ed3<\/h2>\n<p><strong>\u5f02\u5e38\u5904\u7406\u662f Java \u7f16\u7a0b\u7684\u91cd\u8981\u90e8\u5206<\/strong>\uff0c\u5b83\u4f7f\u6211\u4eec\u80fd\u591f\u66f4\u52a0\u5065\u58ee\u5730\u7f16\u5199\u4ee3\u7801\uff0c\u5e94\u5bf9\u4e0d\u53ef\u907f\u514d\u7684\u9519\u8bef\u60c5\u51b5\u3002<strong>\u901a\u8fc7\u4f7f\u7528\u5f02\u5e38\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u597d\u5730\u7406\u89e3\u548c\u7ba1\u7406\u4ee3\u7801\u4e2d\u7684\u95ee\u9898\uff0c\u63d0\u4f9b\u66f4\u597d\u7684\u7528\u6237\u4f53\u9a8c\u3002<\/strong>\u56e0\u6b64\uff0c\u4e86\u89e3\u5f02\u5e38\u7684\u57fa\u7840\u77e5\u8bc6\u548c\u6700\u4f73\u5b9e\u8df5\u5bf9\u4e8e\u6bcf\u4e2a Java \u5f00\u53d1\u8005\u90fd\u662f\u81f3\u5173\u91cd\u8981\u7684\u3002\u5728\u7f16\u5199\u4ee3\u7801\u65f6\uff0c\u8bb0\u5f97\u59cb\u7ec8\u8003\u8651\u5982\u4f55\u5904\u7406\u6f5c\u5728\u7684\u5f02\u5e38\u60c5\u51b5\uff0c\u4ee5\u786e\u4fdd\u4f60\u7684\u7a0b\u5e8f\u80fd\u591f\u5728\u9762\u5bf9\u5404\u79cd\u95ee\u9898\u65f6\u4fdd\u6301\u7a33\u5b9a\u6027\u3002<\/p>\n<hr \/>\n<ul>\n<li>\u7248\u6743\u58f0\u660e\uff1a\u672c\u6587\u4e3aCSDN\u535a\u4e3b\u300c\u7e41\u4f9dFanyi\u300d\u7684\u539f\u521b\u6587\u7ae0\uff0c\u9075\u5faaCC 4.0 BY-SA\u7248\u6743\u534f\u8bae\uff0c\u8f6c\u8f7d\u8bf7\u9644\u4e0a\u539f\u6587\u51fa\u5904\u94fe\u63a5\u53ca\u672c\u58f0\u660e\u3002<br \/>\n\u539f\u6587\u94fe\u63a5\uff1a<a href=\"https:\/\/blog.csdn.net\/qq_21484461\/article\/details\/132766803\">https:\/\/blog.csdn.net\/qq_21484461\/article\/details\/132766803<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u4ec0\u4e48\u662f\u5f02\u5e38\uff1f \u5728 Java \u4e2d\uff0c\u5f02\u5e38\uff08Exception\uff09\u662f\u4e00\u79cd\u5728\u7a0b\u5e8f\u6267\u884c\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4f1a\u53d1\u751f\u7684\u9519\u8bef\u6216\u5f02\u5e38\u60c5\u51b5\u3002\u5f02 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":255,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,5],"tags":[],"_links":{"self":[{"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts\/250"}],"collection":[{"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=250"}],"version-history":[{"count":1,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts\/250\/revisions"}],"predecessor-version":[{"id":251,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/posts\/250\/revisions\/251"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=\/wp\/v2\/media\/255"}],"wp:attachment":[{"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=250"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=250"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/ericw.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}