{"id":202909,"date":"2025-05-22T09:21:02","date_gmt":"2025-05-22T01:21:02","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202909\/"},"modified":"2025-05-22T09:21:02","modified_gmt":"2025-05-22T01:21:02","slug":"java%e5%87%bd%e6%95%b0%e7%9a%84%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86%e5%92%8ctry-catch%e5%9d%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202909\/","title":{"rendered":"Java\u51fd\u6570\u7684\u5f02\u5e38\u5904\u7406\u548ctry-catch\u5757"},"content":{"rendered":"

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

Java\u51fd\u6570\u7684\u5f02\u5e38\u5904\u7406\u548ctry-catch\u5757<\/h1>\n

\u4eca\u5929\u5c06\u7ed9\u5927\u5bb6\u5e26\u6765\u300aJava\u51fd\u6570\u7684\u5f02\u5e38\u5904\u7406\u548ctry-catch\u5757\u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4ee5\u4e0b\u5185\u5bb9\u5c06\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u662f\u6b63\u5728\u5b66\u4e60\u6587\u7ae0<\/span>\u6216\u8005\u5df2\u7ecf\u662f\u5927\u4f6c\u7ea7\u522b\u4e86\uff0c\u90fd\u975e\u5e38\u6b22\u8fce\u4e5f\u5e0c\u671b\u5927\u5bb6\u90fd\u80fd\u7ed9\u6211\u5efa\u8bae\u8bc4\u8bba\u54c8~\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff01<\/p>\n

Java \u4e2d\u7684\u5f02\u5e38\u5904\u7406\u673a\u5236\u4f7f\u7528 try-catch \u5757\u6765\u6355\u83b7\u548c\u5904\u7406\u8fd0\u884c\u65f6\u9519\u8bef\uff1atry \u5757\u5305\u542b\u53ef\u80fd\u5f15\u53d1\u5f02\u5e38\u7684\u4ee3\u7801\u3002catch \u5757\u7279\u5b9a\u6355\u83b7\u5f02\u5e38\u5e76\u63d0\u4f9b\u5904\u7406\u903b\u8f91\uff0c\u786e\u4fdd\u7a0b\u5e8f\u4e0d\u4f1a\u5d29\u6e83\u3002\u6700\u4f73\u5b9e\u8df5\u5305\u62ec\u4ec5\u6355\u83b7\u5b9e\u9645\u53ef\u80fd\u51fa\u73b0\u7684\u5f02\u5e38\uff0c\u63d0\u4f9b\u6709\u610f\u4e49\u7684\u9519\u8bef\u6d88\u606f\uff0c\u5e76\u4f7f\u7528 finally \u5757\u91ca\u653e\u8d44\u6e90\u3002<\/p>\n

<\/p>\n

Java \u51fd\u6570\u4e2d\u7684\u5f02\u5e38\u5904\u7406\u548c try-catch \u5757<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u5f02\u5e38\u662f\u8fd0\u884c\u65f6\u53d1\u751f\u7684\u9519\u8bef\u6216\u610f\u5916\u884c\u4e3a\u3002\u5b83\u4eec\u53ef\u4ee5\u7531\u5404\u79cd\u539f\u56e0\u5f15\u8d77\uff0c\u4f8b\u5982\u65e0\u6548\u7684\u8f93\u5165\u3001\u7f51\u7edc\u95ee\u9898\u6216\u786c\u4ef6\u6545\u969c\u3002\u4e3a\u4e86\u5b89\u5168\u3001\u5065\u58ee\u5730\u5904\u7406\u5f02\u5e38\uff0cJava \u63d0\u4f9b\u4e86\u5f02\u5e38\u5904\u7406\u673a\u5236\uff0c\u5176\u4e2d\u5305\u62ec try-catch<\/code> \u5757\u3002<\/p>\n

try-catch \u5757<\/strong><\/p>\n

try-catch<\/code> \u5757\u7528\u4e8e\u6355\u83b7\u548c\u5904\u7406\u53ef\u80fd\u5f15\u53d1\u751f\u6210\u7684\u4ee3\u7801\u5757\u4e2d\u7684\u5f02\u5e38\u3002\u5b83\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

try {\n  \/\/ \u6267\u884c\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801\n} catch (ExceptionType1 e) {\n  \/\/ \u6355\u83b7 ExceptionType1 \u5f02\u5e38\u5e76\u5904\u7406\u5b83\n} catch (ExceptionType2 e) {\n  \/\/ \u6355\u83b7 ExceptionType2 \u5f02\u5e38\u5e76\u5904\u7406\u5b83\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u8003\u8651\u4ee5\u4e0b\u4ee3\u7801\uff0c\u5b83\u8bd5\u56fe\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u5e76\u8bfb\u53d6\u5185\u5bb9\uff1a<\/p>\n
import java.io.File;\nimport java.io.FileNotFoundException;\nimport java.util.Scanner;\n\npublic class Main {\n  public static void main(String[] args) {\n    try {\n      File file = new File(\"test.txt\");\n      Scanner scanner = new Scanner(file);\n      while (scanner.hasNextLine()) {\n        String line = scanner.nextLine();\n        System.out.println(line);\n      }\n      scanner.close();\n    } catch (FileNotFoundException e) {\n      System.out.println(\"\u6587\u4ef6\u672a\u627e\u5230\uff01\");\n    }\n  }\n}<\/pre>\n
try<\/code> \u5757\u5305\u542b\u4e86\u53ef\u80fd\u5f15\u53d1 FileNotFoundException<\/code> \u5f02\u5e38\u7684\u4ee3\u7801\u3002\u5982\u679c\u6b64\u5f02\u5e38\u53d1\u751f\uff0c\u5c06\u6267\u884c catch<\/code> \u5757\uff0c\u8f93\u51fa “\u6587\u4ef6\u672a\u627e\u5230\uff01” \u6d88\u606f\u3002\u6b64\u673a\u5236\u786e\u4fdd\u7a0b\u5e8f\u4e0d\u4f1a\u5d29\u6e83\u5e76\u7ee7\u7eed\u8fd0\u884c\u3002<\/p>\n
\u6700\u4f73\u5b9e\u8df5<\/strong><\/p>\n
    \n
  • \u4ec5\u6355\u83b7\u5b9e\u9645\u53ef\u80fd\u7531\u4ee3\u7801\u5757\u629b\u51fa\u7684\u5f02\u5e38\u3002<\/li>\n
  • \u5982\u679c\u5f02\u5e38\u53ef\u80fd\u662f\u7531\u591a\u79cd\u56e0\u7d20\u5f15\u8d77\u7684\uff0c\u8bf7\u4f7f\u7528\u66f4\u901a\u7528\u7684\u5f02\u5e38\u7c7b\u578b\uff08\u5982 Exception<\/code>\uff09\u3002<\/li>\n
  • \u63d0\u4f9b\u6709\u610f\u4e49\u7684\u9519\u8bef\u6d88\u606f\u4ee5\u5e2e\u52a9\u8c03\u8bd5\u3002<\/li>\n
  • \u8003\u8651\u4f7f\u7528 finally<\/code> \u5757\u6765\u91ca\u653e\u8d44\u6e90\uff0c\u65e0\u8bba\u662f\u5426\u53d1\u751f\u5f02\u5e38\u3002<\/li>\n
  • \u59cb\u7ec8\u5199\u51fa\u5065\u58ee\u7684\u3001\u80fd\u5904\u7406\u5f02\u5e38\u7684\u4ee3\u7801\uff0c\u4ee5\u786e\u4fdd\u7a0b\u5e8f\u7a33\u5b9a\u3002<\/li>\n<\/ul>\n
    \u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300aJava\u51fd\u6570\u7684\u5f02\u5e38\u5904\u7406\u548ctry-catch\u5757\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
    Java\u51fd\u6570\u7684\u5f02\u5e38\u5904\u7406\u548ctry-...<\/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-202909","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202909","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=202909"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202909\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202909"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202909"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}