{"id":202642,"date":"2025-05-22T08:46:20","date_gmt":"2025-05-22T00:46:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202642\/"},"modified":"2025-05-22T08:46:20","modified_gmt":"2025-05-22T00:46:20","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-java-%e4%b8%ad%e7%9a%84try-catch-finally%e5%9d%97%e6%9d%a5%e5%a4%84%e7%90%86%e5%bc%82%e5%b8%b8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202642\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 Java \u4e2d\u7684try-catch-finally\u5757\u6765\u5904\u7406\u5f02\u5e38\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u4f7f\u7528 Java \u4e2d\u7684try-catch-finally\u5757\u6765\u5904\u7406\u5f02\u5e38\uff1f<\/h1>\n

\u5c0f\u4f19\u4f34\u4eec\u5bf9\u6587\u7ae0\u7f16\u7a0b\u611f\u5174\u8da3\u5417\uff1f\u662f\u5426\u6b63\u5728\u5b66\u4e60\u76f8\u5173\u77e5\u8bc6\u70b9\uff1f\u5982\u679c\u662f\uff0c\u90a3\u4e48\u672c\u6587\u300a\u5982\u4f55\u4f7f\u7528 Java \u4e2d\u7684try-catch-finally\u5757\u6765\u5904\u7406\u5f02\u5e38\uff1f\u300b\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff0c\u672c\u7bc7\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec\u3002\u5728\u4e4b\u540e\u7684\u6587\u7ae0\u4e2d\u4e5f\u4f1a\u591a\u591a\u5206\u4eab\u76f8\u5173\u77e5\u8bc6\u70b9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

\u901a\u8fc7 try-catch-finally \u5757\u5904\u7406\u5f02\u5e38\uff0c\u53ef\u4ee5\u6355\u83b7\u4ee3\u7801\u5757\u4e2d\u53ef\u80fd\u53d1\u751f\u7684\u5f02\u5e38\u3002try \u5757\u5305\u542b\u53ef\u80fd\u4f1a\u5f15\u53d1\u5f02\u5e38\u7684\u4ee3\u7801\uff0ccatch \u5757\u7528\u4e8e\u6355\u83b7\u7279\u5b9a\u7c7b\u578b\u7684\u5f02\u5e38\uff0cfinally \u5757\u7528\u4e8e\u65e0\u8bba\u662f\u5426\u5f15\u53d1\u5f02\u5e38\u90fd\u4f1a\u6267\u884c\u7684\u4ee3\u7801\u3002\u5b83\u63d0\u9ad8\u4e86\u7a0b\u5e8f\u7684\u5065\u58ee\u6027\u548c\u53ef\u9760\u6027\uff0c\u786e\u4fdd\u4e86\u5373\u4f7f\u53d1\u751f\u5f02\u5e38\u4e5f\u80fd\u6b63\u786e\u91ca\u653e\u8d44\u6e90\u3002<\/p>\n

<\/p>\n

\u4f7f\u7528 Java \u4e2d\u7684 try-catch-finally \u5757\u5904\u7406\u5f02\u5e38<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0ctry-catch-finally \u5757\u662f\u4e00\u79cd Exception Handling \u673a\u5236\uff0c\u7528\u4e8e\u5904\u7406\u4ee3\u7801\u5757\u4e2d\u53ef\u80fd\u53d1\u751f\u7684\u5f02\u5e38\u3002\u5176\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

try {\n  \/\/ \u53ef\u80fd\u4f1a\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801\u5757\n} catch (ExceptionType1 ex1) {\n  \/\/ \u5904\u7406 ExceptionType1 \u5f02\u5e38\u7684\u4ee3\u7801\u5757\n} catch (ExceptionType2 ex2) {\n  \/\/ \u5904\u7406 ExceptionType2 \u5f02\u5e38\u7684\u4ee3\u7801\u5757\n} finally {\n  \/\/ \u65e0\u8bba\u662f\u5426\u5f15\u53d1\u5f02\u5e38\u90fd\u4f1a\u6267\u884c\u7684\u4ee3\u7801\u5757\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u8003\u8651\u4ee5\u4e0b\u4ee3\u7801\uff0c\u7528\u4e8e\u4ece\u6587\u4ef6\u8bfb\u53d6\u6570\u636e\u3002<\/p>\n
try {\n  \/\/ \u521b\u5efa\u6587\u4ef6\u9605\u8bfb\u5668\n  FileReader fileReader = new FileReader(\"data.txt\");\n  \/\/ \u4f7f\u7528\u6587\u4ef6\u9605\u8bfb\u5668\u8bfb\u53d6\u6570\u636e\n  String data = fileReader.read();\n  \/\/ \u6587\u4ef6\u8bfb\u53d6\u6210\u529f...\n\n} catch (FileNotFoundException ex) {\n  \/\/ \u5982\u679c\u627e\u4e0d\u5230\u6587\u4ef6\uff0c\u5219\u6355\u83b7 FileNotFoundException\n  System.err.println(\"\u6587\u4ef6\u672a\u627e\u5230\uff1adata.txt\");\n\n} catch (IOException ex) {\n  \/\/ \u5982\u679c\u53d1\u751f\u5176\u4ed6 I\/O \u5f02\u5e38\uff0c\u5219\u6355\u83b7 IOException\n  System.err.println(\"\u8bfb\u53d6\u6587\u4ef6\u65f6\u51fa\u9519\uff1adata.txt\");\n\n} finally {\n  \/\/ \u65e0\u8bba\u662f\u5426\u5f15\u53d1\u5f02\u5e38\uff0c\u90fd\u4f1a\u5173\u95ed\u6587\u4ef6\u9605\u8bfb\u5668\n  fileReader.close();\n}<\/pre>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff1a<\/p>\n
    \n
  • try<\/code> \u5757\u5305\u542b\u53ef\u80fd\u4f1a\u5f15\u53d1\u5f02\u5e38\u7684\u4ee3\u7801\uff0c\u5373\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u3002<\/li>\n
  • catch(FileNotFoundException ex)<\/code> \u5757\u7528\u4e8e\u6355\u83b7 FileNotFoundException<\/code>\uff0c\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\u5219\u4f1a\u5f15\u53d1\u3002<\/li>\n
  • catch(IOException ex)<\/code> \u5757\u7528\u4e8e\u6355\u83b7\u4efb\u4f55\u5176\u4ed6 I\/O \u5f02\u5e38\u3002<\/li>\n
  • finally<\/code> \u5757\u7528\u4e8e\u5173\u95ed\u6587\u4ef6\u9605\u8bfb\u5668\uff0c\u65e0\u8bba\u662f\u5426\u5f15\u53d1\u5f02\u5e38\u3002<\/li>\n<\/ul>\n
    \u901a\u8fc7\u4f7f\u7528 try-catch-finally<\/code> \u5757\u53ef\u4ee5\u786e\u4fdd\u8d44\u6e90\uff08\u5982\u6587\u4ef6\u9605\u8bfb\u5668\uff09\u5373\u4f7f\u53d1\u751f\u5f02\u5e38\u4e5f\u80fd\u88ab\u6b63\u786e\u91ca\u653e\uff0c\u4ece\u800c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u5065\u58ee\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n
    \u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300a\u5982\u4f55\u4f7f\u7528 Java \u4e2d\u7684try-catch-finally\u5757\u6765\u5904\u7406\u5f02\u5e38\uff1f\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":"
    \u5982\u4f55\u4f7f\u7528 Java \u4e2d\u7684try-...<\/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-202642","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202642","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=202642"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202642\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202642"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202642"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202642"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}