{"id":202559,"date":"2025-05-22T09:02:24","date_gmt":"2025-05-22T01:02:24","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202559\/"},"modified":"2025-05-22T09:02:24","modified_gmt":"2025-05-22T01:02:24","slug":"%e5%a6%82%e4%bd%95%e9%80%9a%e8%bf%87%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86%e5%9c%a8-java-%e4%b8%ad%e5%ae%9e%e7%8e%b0%e4%bc%98%e9%9b%85%e7%9a%84%e5%a4%b1%e8%b4%a5%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202559\/","title":{"rendered":"\u5982\u4f55\u901a\u8fc7\u5f02\u5e38\u5904\u7406\u5728 Java \u4e2d\u5b9e\u73b0\u4f18\u96c5\u7684\u5931\u8d25\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u901a\u8fc7\u5f02\u5e38\u5904\u7406\u5728 Java \u4e2d\u5b9e\u73b0\u4f18\u96c5\u7684\u5931\u8d25\uff1f<\/h1>\n

\u5bf9\u4e8e\u4e00\u4e2a\u6587\u7ae0\u5f00\u53d1\u8005\u6765\u8bf4\uff0c\u7262\u56fa\u624e\u5b9e\u7684\u57fa\u7840\u662f\u5341\u5206\u91cd\u8981\u7684\uff0c\u5c31\u6765\u5e26\u5927\u5bb6\u4e00\u70b9\u70b9\u7684\u638c\u63e1\u57fa\u7840\u77e5\u8bc6\u70b9\u3002\u4eca\u5929\u672c\u7bc7\u6587\u7ae0\u5e26\u5927\u5bb6\u4e86\u89e3\u300a\u5982\u4f55\u901a\u8fc7\u5f02\u5e38\u5904\u7406\u5728 Java \u4e2d\u5b9e\u73b0\u4f18\u96c5\u7684\u5931\u8d25\uff1f\u300b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e86\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u5feb\u70b9\u6536\u85cf\u8d77\u6765\u5427\uff0c\u5426\u5219\u9700\u8981\u65f6\u5c31\u627e\u4e0d\u5230\u4e86\uff01<\/p>\n

Java \u4e2d\u901a\u8fc7\u5f02\u5e38\u5904\u7406\u5b9e\u73b0\u4f18\u96c5\u5931\u8d25\u5305\u62ec\u4ee5\u4e0b\u6b65\u9aa4\uff1a\u629b\u51fa\u5f02\u5e38\u4ee5\u8868\u793a\u9519\u8bef\u3002\u4f7f\u7528 try-catch \u5757\u6355\u83b7\u5f02\u5e38\u5e76\u8fdb\u884c\u5904\u7406\u3002\u4f7f\u7528 finally \u5757\u91ca\u653e\u8d44\u6e90\u6216\u6267\u884c\u6e05\u7406\u4efb\u52a1\u3002\u901a\u8fc7\u8fd9\u4e9b\u6b65\u9aa4\uff0c\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u5728\u9047\u5230\u5f02\u5e38\u65f6\u6267\u884c\u53ef\u63a7\u4e14\u7528\u6237\u53cb\u597d\u7684\u54cd\u5e94\uff0c\u907f\u514d\u5d29\u6e83\u3002<\/p>\n

<\/p>\n

\u5982\u4f55\u901a\u8fc7\u5f02\u5e38\u5904\u7406\u5728 Java \u4e2d\u5b9e\u73b0\u4f18\u96c5\u7684\u5931\u8d25<\/strong><\/p>\n

\u5728\u7f16\u5199 Java \u4ee3\u7801\u65f6\uff0c\u5904\u7406\u5f02\u5e38\u81f3\u5173\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u6709\u52a9\u4e8e\u786e\u4fdd\u5e94\u7528\u7a0b\u5e8f\u5728\u9047\u5230\u4e0d\u53ef\u9884\u89c1\u7684\u4e8b\u4ef6\u65f6\u4e0d\u4f1a\u5d29\u6e83\u3002\u4f18\u96c5\u7684\u5931\u8d25\u662f\u6307\u5373\u4f7f\u5e94\u7528\u7a0b\u5e8f\u9047\u5230\u5f02\u5e38\uff0c\u4e5f\u80fd\u4ee5\u53ef\u63a7\u4e14\u7528\u6237\u53cb\u597d\u7684\u65b9\u5f0f\u7ee7\u7eed\u8fd0\u884c\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u5b66\u4e60\u901a\u8fc7\u5f02\u5e38\u5904\u7406\u5728 Java \u4e2d\u5b9e\u73b0\u4f18\u96c5\u7684\u5931\u8d25\u3002<\/p>\n

\u629b\u51fa\u5f02\u5e38<\/strong><\/p>\n

\u5f02\u5e38\u8868\u793a\u4ee3\u7801\u6267\u884c\u8fc7\u7a0b\u4e2d\u9047\u5230\u7684\u9519\u8bef\u6216\u5f02\u5e38\u60c5\u51b5\u3002\u53ef\u4ee5\u4f7f\u7528 throw<\/code> \u8bed\u53e5\u629b\u51fa\u5f02\u5e38\u3002\u4f8b\u5982\uff1a<\/p>\n

try {\n    \/\/ \u4ee3\u7801\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\n} catch (Exception e) {\n    \/\/ \u5904\u7406\u5f02\u5e38\n}<\/pre>\n
\u6355\u83b7\u5f02\u5e38<\/strong><\/p>\n
\u5f02\u5e38\u53ef\u4ee5\u4f7f\u7528 try-catch<\/code> \u5757\u6355\u83b7\u3002try<\/code> \u5757\u4e2d\u7684\u4ee3\u7801\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\uff0c\u800c catch<\/code> \u5757\u7528\u4e8e\u5904\u7406\u8fd9\u4e9b\u5f02\u5e38\u3002\u4f8b\u5982\uff1a<\/p>\n
try {\n    \/\/ \u4ee3\u7801\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\n} catch (IOException e) {\n    \/\/ \u5904\u7406\u6587\u4ef6\u8f93\u5165\/\u8f93\u51fa\u5f02\u5e38\n} catch (NumberFormatException e) {\n    \/\/ \u5904\u7406\u6570\u5b57\u683c\u5f0f\u5f02\u5e38\n}<\/pre>\n
\u4f7f\u7528 Finally \u5757<\/strong><\/p>\n
finally<\/code> \u5757\u59cb\u7ec8\u5728 try<\/code> \u5757\u548c\u6240\u6709 catch<\/code> \u5757\u4e4b\u540e\u6267\u884c\uff0c\u65e0\u8bba\u662f\u5426\u53d1\u751f\u5f02\u5e38\u3002\u8fd9\u53ef\u4ee5\u7528\u6765\u91ca\u653e\u8d44\u6e90\u6216\u6267\u884c\u6e05\u7406\u4efb\u52a1\u3002\u4f8b\u5982\uff1a<\/p>\n
try {\n    \/\/ \u4ee3\u7801\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\n} catch (Exception e) {\n    \/\/ \u5904\u7406\u5f02\u5e38\n} finally {\n    \/\/ \u91ca\u653e\u8d44\u6e90\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u8ba9\u6211\u4eec\u8003\u8651\u4e00\u4e2a\u8bfb\u53d6\u6587\u4ef6\u5e76\u5bf9\u5176\u8fdb\u884c\u5904\u7406\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\u6216\u4e0d\u53ef\u8bfb\uff0c\u5e94\u7528\u7a0b\u5e8f\u5e94\u8be5\u4f18\u96c5\u5730\u5931\u8d25\u5e76\u901a\u77e5\u7528\u6237\u3002<\/p>\n
import java.io.File;\nimport java.io.FileNotFoundException;\nimport java.util.Scanner;\n\npublic class FileProcessor {\n\n    public static void main(String[] args) {\n        String fileName = \"data.txt\";\n\n        try {\n            File file = new File(fileName);\n            Scanner scanner = new Scanner(file);\n\n            \/\/ \u5904\u7406\u6587\u4ef6\u4e2d\u7684\u6570\u636e\n            \n            scanner.close();\n        } catch (FileNotFoundException e) {\n            \/\/ \u6587\u4ef6\u4e0d\u5b58\u5728\u6216\u4e0d\u53ef\u8bfb\n            System.out.println(\"\u6587\u4ef6\u672a\u627e\u5230\u6216\u4e0d\u53ef\u8bfb\uff1a\" + fileName);\n        } catch (Exception e) {\n            \/\/ \u5176\u4ed6\u5f02\u5e38\n            System.out.println(\"\u5904\u7406\u6587\u4ef6\u65f6\u53d1\u751f\u9519\u8bef\uff1a\" + e.getMessage());\n        }\n    }\n}<\/pre>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u6355\u83b7\u4e86 FileNotFoundException<\/code> \u4ee5\u4f18\u96c5\u5730\u5904\u7406\u6587\u4ef6\u4e0d\u5b58\u5728\u6216\u4e0d\u53ef\u8bfb\u7684\u60c5\u51b5\u3002\u5bf9\u4e8e\u5176\u4ed6\u5f02\u5e38\u60c5\u51b5\uff0c\u6211\u4eec\u4f7f\u7528\u4e86\u4e00\u4e2a\u901a\u7528\u7684 catch<\/code> \u5757\u6765\u6355\u83b7\u5e76\u8bb0\u5f55\u9519\u8bef\u6d88\u606f\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u300a\u5982\u4f55\u901a\u8fc7\u5f02\u5e38\u5904\u7406\u5728 Java \u4e2d\u5b9e\u73b0\u4f18\u96c5\u7684\u5931\u8d25\uff1f\u300b\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u5173\u4e8e\u5f02\u5e38\u5904\u7406,\u4f18\u96c5\u5931\u8d25\u7684\u8d44\u6599\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u901a\u8fc7\u5f02\u5e38\u5904\u7406\u5728 Java \u4e2d...<\/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-202559","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202559","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=202559"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202559\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}