{"id":72590,"date":"2024-02-21T11:19:46","date_gmt":"2024-02-21T03:19:46","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=72590"},"modified":"2024-02-21T11:20:20","modified_gmt":"2024-02-21T03:20:20","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-java-%e4%b8%ad%e4%bc%98%e9%9b%85%e5%9c%b0%e5%a4%84%e7%90%86%e9%94%99%e8%af%af%e5%92%8c%e5%bc%82%e5%b8%b8%ef%bc%9f-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/72590.html","title":{"rendered":"\u5982\u4f55\u5728 Java \u4e2d\u4f18\u96c5\u5730\u5904\u7406\u9519\u8bef\u548c\u5f02\u5e38\uff1f"},"content":{"rendered":"

\"\u5982\u4f55\u5728<\/p>\n

\u5728Java\u4e2d\u4f18\u96c5\u5730\u5904\u7406\u9519\u8bef\u548c\u5f02\u5e38\u7684\u5173\u952e\u662f\uff1a\u7406\u89e3\u5f02\u5e38\u7c7b\u578b\u3001\u5408\u7406\u8bbe\u8ba1\u5f02\u5e38\u5904\u7406\u7b56\u7565\u3001\u4f7f\u7528try-catch-finally\u8bed\u53e5\u5757\u3001\u5408\u7406\u8fd0\u7528\u81ea\u5b9a\u4e49\u5f02\u5e38<\/strong>\uff0c\u4ee5\u53ca\u8fd0\u7528\u65e5\u5fd7\u8bb0\u5f55\u5f02\u5e38\u4fe1\u606f<\/strong>\u3002\u8fd9\u4e9b\u505a\u6cd5\u53ef\u4ee5\u8ba9\u4f60\u7684\u7a0b\u5e8f\u5177\u5907\u826f\u597d\u7684\u5f02\u5e38\u5904\u7406\u673a\u5236\uff0c\u4e0d\u4ec5\u80fd\u591f\u4f18\u96c5\u5730\u5904\u7406\u8fd0\u884c\u65f6\u51fa\u73b0\u7684\u95ee\u9898\uff0c\u8fd8\u80fd\u591f\u63d0\u5347\u7a0b\u5e8f\u7684\u5065\u58ee\u6027\u548c\u53ef\u7ef4\u62a4\u6027\u3002\u5c55\u5f00\u6765\u8bf4\uff0c\u4f7f\u7528try-catch-finally\u8bed\u53e5\u5757\u662f\u5904\u7406\u5f02\u5e38\u7684\u57fa\u7840\uff1atry\u5757\u5305\u542b\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801\u3001catch\u5757\u7528\u4e8e\u6355\u83b7\u548c\u5904\u7406\u7279\u5b9a\u7684\u5f02\u5e38\uff0c\u800cfinally\u5757\u63d0\u4f9b\u4e86\u4e00\u4e2a\u603b\u4f1a\u6267\u884c\u7684\u4ee3\u7801\u533a\u5757\uff0c\u7528\u6765\u505a\u6e05\u7406\u6027\u5de5\u4f5c\uff0c\u6bd4\u5982\u91ca\u653e\u8d44\u6e90\u7b49\u3002<\/p>\n

\u4e00\u3001\u7406\u89e3 JAVA \u5f02\u5e38\u4f53\u7cfb<\/strong><\/h2>\n

\u5728\u6df1\u5165\u5f02\u5e38\u5904\u7406\u4e4b\u524d\uff0c\u9700\u8981\u660e\u786eJava\u5f02\u5e38\u4f53\u7cfb\u7684\u6784\u9020\u3002Java\u7684\u5f02\u5e38\u5206\u4e3a\u4e24\u5927\u7c7b\uff1aError\u548cException\u3002Error\u662f\u6307\u90a3\u4e9b\u901a\u5e38\u4e0d\u7531\u7a0b\u5e8f\u6765\u63a7\u5236\u7684\u9519\u8bef\uff0c\u5982JVM\u9519\u8bef\u3002Exception\u5219\u5206\u4e3a\u53d7\u68c0\u5f02\u5e38\uff08Checked Exceptions\uff09\u548c\u4e0d\u53d7\u68c0\u5f02\u5e38\uff08Unchecked Exceptions\uff0c\u5373RuntimeException\uff09\u3002<\/p>\n

\u53d7\u68c0\u5f02\u5e38<\/strong>\u5fc5\u987b\u663e\u5f0f\u5730\u8fdb\u884c\u6355\u83b7\u6216\u58f0\u660e\u629b\u51fa\u3002\u8fd9\u79cd\u5f02\u5e38\u901a\u5e38\u662f\u53ef\u9884\u89c1\u7684\uff0c\u56e0\u6b64\u7a0b\u5e8f\u5e94\u8be5\u80fd\u591f\u5904\u7406\u8fd9\u4e9b\u5f02\u5e38\u60c5\u51b5\u3002<\/p>\n

\u4e0d\u53d7\u68c0\u5f02\u5e38<\/strong>\u4e0d\u8981\u6c42\u663e\u5f0f\u6355\u83b7\uff0c\u5b83\u901a\u5e38\u662f\u56e0\u4e3a\u7f16\u7a0b\u9519\u8bef\u5bfc\u81f4\u7684\uff0c\u5982\u7a7a\u6307\u9488\u8bbf\u95ee\u3002<\/p>\n

\u4e8c\u3001\u8bbe\u8ba1\u5408\u7406\u7684\u5f02\u5e38\u5904\u7406\u7b56\u7565<\/strong><\/h2>\n

\u8bbe\u8ba1\u5f02\u5e38\u5904\u7406\u7b56\u7565\u9996\u5148\u8981\u57fa\u4e8e\u4e1a\u52a1\u903b\u8f91\u7684\u9700\u6c42\u548c\u7a0b\u5e8f\u7684\u7a33\u5b9a\u6027\u8fdb\u884c\u8003\u8651\u3002\u597d\u7684\u5f02\u5e38\u5904\u7406\u7b56\u7565\u5e94\u8be5\u80fd\u591f\uff1a<\/p>\n

1. \u6070\u5f53\u53cd\u9988\u4fe1\u606f\u7ed9\u7528\u6237<\/strong>\uff0c\u800c\u4e0d\u662f\u7b80\u5355\u5730\u629b\u51fa\u539f\u751f\u5f02\u5e38\u4fe1\u606f;<\/p>\n

2. \u4fdd\u8bc1\u7a0b\u5e8f\u80fd\u591f\u5b89\u5168\u5730\u8fd0\u884c\u6216\u4f18\u96c5\u5730\u7ec8\u6b62<\/strong>\uff0c\u800c\u4e0d\u662f\u8ba9\u7a0b\u5e8f\u5904\u5728\u4e00\u4e2a\u4e0d\u786e\u5b9a\u7684\u72b6\u6001;<\/p>\n

\u4e00\u4e2a\u5408\u7406\u7684\u7b56\u7565\u662f\uff1a\u5728\u7a0b\u5e8f\u7684\u8fb9\u754c\u5c42\u5c3d\u91cf\u6355\u83b7\u5f02\u5e38\uff0c\u5e76\u8fdb\u884c\u9002\u5f53\u7684\u5904\u7406\u6216\u7528\u6237\u53cd\u9988\u3002\u5728\u5185\u90e8\u903b\u8f91\u4e2d\uff0c\u5c06\u5f02\u5e38\u4f20\u9012\u51fa\u53bb\uff0c\u4f7f\u5f97\u8fb9\u754c\u5c42\u53ef\u4ee5\u5f97\u77e5\u5e76\u5904\u7406\u3002<\/p>\n

\u4e09\u3001\u4f7f\u7528 TRY-CATCH-FINALLY \u8bed\u53e5\u5757<\/strong><\/h2>\n

\u6b63\u786e\u4f7f\u7528try-catch-finally\u8bed\u53e5\u5757\u5bf9\u4e8e\u5f02\u5e38\u5904\u7406\u81f3\u5173\u91cd\u8981\u3002<\/p>\n

1. \u5c06try\u5757\u4fdd\u6301\u7cbe\u7b80\uff0c\u53ea\u5305\u542b\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801\uff1b<\/p>\n

2. catch\u5757\u5e94\u5177\u4f53\u5230\u7279\u5b9a\u5f02\u5e38\uff0c\u907f\u514d\u6355\u83b7\u8fc7\u4e8e\u5bbd\u6cdb\u7684\u5f02\u5e38\u7c7b\uff0c\u6bd4\u5982Exception\u6216Throwable\uff1b<\/p>\n

3. finally\u5757\u662f\u4fdd\u8bc1\u4e00\u6bb5\u4ee3\u7801\u65e0\u8bba\u5f02\u5e38\u662f\u5426\u53d1\u751f\u90fd\u4f1a\u6267\u884c\u7684\u5730\u65b9\uff0c\u5e38\u7528\u6765\u5173\u95ed\u8d44\u6e90\u3002<\/p>\n

\u4f7f\u7528try-with-resources\u8bed\u53e5<\/strong>\uff0c\u81eaJava 7\u8d77\uff0c\u53ef\u4ee5\u66f4\u4f18\u96c5\u5730\u7ba1\u7406\u8d44\u6e90\uff0c\u56e0\u4e3a\u5b83\u80fd\u591f\u4fdd\u8bc1\u4efb\u4f55\u5b9e\u73b0\u4e86AutoCloseable\u63a5\u53e3\u7684\u8d44\u6e90\u5728try\u5757\u6267\u884c\u5b8c\u540e\u81ea\u52a8\u88ab\u5173\u95ed\u3002<\/p>\n

\u56db\u3001\u5408\u7406\u8fd0\u7528\u81ea\u5b9a\u4e49\u5f02\u5e38<\/strong><\/h2>\n

\u6709\u65f6\u5019Java\u63d0\u4f9b\u7684\u6807\u51c6\u5f02\u5e38\u7c7b\u578b\u4e0d\u80fd\u6ee1\u8db3\u6211\u4eec\u7684\u9700\u6c42\uff0c\u8fd9\u65f6\u5019\u53ef\u4ee5\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\u3002\u81ea\u5b9a\u4e49\u5f02\u5e38\u80fd\u591f\u63d0\u4f9b\u66f4\u4e30\u5bcc\u7684\u9519\u8bef\u4fe1\u606f\uff0c\u4f7f\u5f97\u5f02\u5e38\u7684\u7c7b\u578b\u66f4\u52a0\u7b26\u5408\u4e1a\u52a1\u903b\u8f91\u3002\u4f46\u8981\u6ce8\u91cd\uff1a<\/p>\n

1. \u81ea\u5b9a\u4e49\u5f02\u5e38\u7c7b\u5e94\u8be5\u7ee7\u627f\u81eaException\u6216RuntimeException<\/strong>\uff1b<\/p>\n

2. \u63d0\u4f9b\u4e0d\u540c\u7684\u6784\u9020\u5668\uff0c\u4ee5\u63a5\u6536\u9519\u8bef\u4fe1\u606f\u6216\u5176\u4ed6\u4e0a\u4e0b\u6587\u6570\u636e\uff1b<\/p>\n

3. \u81ea\u5b9a\u4e49\u5f02\u5e38\u5e94\u5c3d\u91cf\u5177\u4f53<\/strong>\uff0c\u5b83\u5e94\u8be5\u53cd\u6620\u51fa\u7279\u5b9a\u7684\u9519\u8bef\u60c5\u51b5\u3002<\/p>\n

\u4e94\u3001\u8fd0\u7528\u65e5\u5fd7\u8bb0\u5f55\u5f02\u5e38\u4fe1\u606f<\/strong><\/h2>\n

\u5728\u53d1\u751f\u5f02\u5e38\u65f6\uff0c\u5c06\u5f02\u5e38\u4fe1\u606f\u8bb0\u5f55\u4e0b\u6765\u662f\u975e\u5e38\u6709\u7528\u7684\uff0c\u5b83\u5bf9\u4e8e\u95ee\u9898\u7684\u8c03\u8bd5\u548c\u5206\u6790\u4ee5\u53ca\u672a\u6765\u7684\u95ee\u9898\u9884\u9632\u90fd\u81f3\u5173\u91cd\u8981\u3002\u9002\u5f53\u7684\u65e5\u5fd7\u8bb0\u5f55\u7b56\u7565\u5305\u62ec\uff1a<\/p>\n

1. \u5728catch\u5757\u4e2d\u8bb0\u5f55\u65e5\u5fd7<\/strong>\uff0c\u800c\u4e0d\u662f\u7b80\u5355\u5730\u6253\u5370\u6808\u8ffd\u8e2a\u6216\u8005\u5ffd\u89c6\u5b83\uff1b<\/p>\n

2. \u9009\u62e9\u5408\u9002\u7684\u65e5\u5fd7\u7ea7\u522b\uff08\u5982ERROR\u3001WARN\u3001INFO\u3001DEBUG\uff09\uff1b<\/p>\n

3. \u5305\u542b\u8db3\u591f\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f\uff0c\u6bd4\u5982\uff0c\u53d1\u751f\u5f02\u5e38\u65f6\u7684\u8f93\u5165\u53c2\u6570\u3001\u7528\u6237\u7b49\u3002<\/p>\n

\u603b\u800c\u8a00\u4e4b\uff0c\u4f18\u96c5\u7684\u5f02\u5e38\u5904\u7406\u662f\u8f6f\u4ef6\u5f00\u53d1\u4e2d\u7684\u4e00\u9879\u57fa\u672c\u529f\uff0c\u9700\u8981\u5f00\u53d1\u8005\u5bf9\u4e8e\u5f02\u5e38\u6709\u6df1\u5165\u7684\u7406\u89e3\uff0c\u5e76\u6839\u636e\u9879\u76ee\u7684\u7279\u70b9\u8bbe\u8ba1\u5408\u7406\u7684\u5f02\u5e38\u5904\u7406\u673a\u5236\u3002\u9002\u5f53\u7684\u5f02\u5e38\u5904\u7406\u4e0d\u4f46\u80fd\u4fdd\u969c\u7a0b\u5e8f\u7684\u7a33\u5b9a\u6027\u548c\u7528\u6237\u4f53\u9a8c\uff0c\u8fd8\u80fd\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u8bfb\u6027\u3002<\/p>\n

\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

\u5982\u4f55\u5728 Java \u4e2d\u6b63\u786e\u5904\u7406\u9519\u8bef\u548c\u5f02\u5e38\uff1f<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u6b63\u786e\u5904\u7406\u9519\u8bef\u548c\u5f02\u5e38\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u9996\u5148\u8981\u786e\u4fdd\u7a0b\u5e8f\u4e2d\u4f7f\u7528 try-catch \u5757\u6765\u6355\u83b7\u53ef\u80fd\u53d1\u751f\u7684\u5f02\u5e38\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u7a0b\u5e8f\u5d29\u6e83\u3002\u53e6\u5916\uff0c\u8981\u6ce8\u610f\u4f7f\u7528 throws \u5173\u952e\u5b57\u58f0\u660e\u65b9\u6cd5\u53ef\u80fd\u629b\u51fa\u7684\u5f02\u5e38\uff0c\u4ee5\u4fbf\u5728\u8c03\u7528\u65b9\u6cd5\u65f6\u8fdb\u884c\u9002\u5f53\u7684\u5f02\u5e38\u5904\u7406\u3002<\/p>\n

\u4e3a\u4e86\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u53ef\u7ef4\u62a4\u6027\uff0c\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\u7c7b\u6765\u5c01\u88c5\u7279\u5b9a\u7684\u5f02\u5e38\u60c5\u51b5\uff0c\u8fd9\u6837\u53ef\u4ee5\u66f4\u597d\u5730\u7406\u89e3\u4ee3\u7801\u4e2d\u53d1\u751f\u7684\u9519\u8bef\u3002<\/p>\n

\u540c\u65f6\uff0c\u5728\u5904\u7406\u5f02\u5e38\u65f6\uff0c\u5e94\u6839\u636e\u5f02\u5e38\u7684\u7c7b\u578b\u6267\u884c\u76f8\u5e94\u7684\u5904\u7406\u903b\u8f91\u3002\u53ef\u4ee5\u4f7f\u7528\u591a\u4e2a catch \u5757\u6765\u6355\u83b7\u4e0d\u540c\u7c7b\u578b\u7684\u5f02\u5e38\uff0c\u5e76\u9488\u5bf9\u4e0d\u540c\u7684\u60c5\u51b5\u8fdb\u884c\u4e0d\u540c\u7684\u5904\u7406\u3002\u5bf9\u4e8e\u4e00\u4e9b\u4e0d\u53ef\u6062\u590d\u7684\u9519\u8bef\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528 finally \u5757\u6765\u91ca\u653e\u8d44\u6e90\uff0c\u786e\u4fdd\u8d44\u6e90\u5f97\u5230\u6b63\u786e\u5730\u56de\u6536\u548c\u91ca\u653e\u3002<\/p>\n

\u603b\u7684\u6765\u8bf4\uff0c\u4f18\u96c5\u5730\u5904\u7406\u9519\u8bef\u548c\u5f02\u5e38\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u7684\u5065\u58ee\u6027\u548c\u53ef\u9760\u6027\uff0c\u8ba9\u7a0b\u5e8f\u5728\u51fa\u73b0\u5f02\u5e38\u60c5\u51b5\u4e0b\u4e5f\u80fd\u591f\u6b63\u5e38\u8fd0\u884c\uff0c\u7ed9\u7528\u6237\u66f4\u597d\u7684\u4f53\u9a8c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Java\u4e2d\u4f18\u96c5\u5730\u5904\u7406\u9519\u8bef\u548c\u5f02\u5e38\u7684\u5173\u952e\u662f\uff1a\u7406\u89e3\u5f02\u5e38\u7c7b\u578b\u3001\u5408\u7406\u8bbe\u8ba1\u5f02\u5e38\u5904\u7406\u7b56\u7565\u3001\u4f7f\u7528try-catch-fina […]","protected":false},"author":1,"featured_media":72593,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/72590"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=72590"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/72590\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/72593"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=72590"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=72590"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=72590"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}