{"id":202740,"date":"2025-05-22T11:03:04","date_gmt":"2025-05-22T03:03:04","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202740\/"},"modified":"2025-05-22T11:03:04","modified_gmt":"2025-05-22T03:03:04","slug":"%e5%a6%82%e4%bd%95-java-%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86%e4%b8%ad%e4%bd%bf%e7%94%a8%e4%b8%8d%e5%90%8c%e7%b1%bb%e5%9e%8b%e7%9a%84%e5%bc%82%e5%b8%b8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202740\/","title":{"rendered":"\u5982\u4f55 Java \u5f02\u5e38\u5904\u7406\u4e2d\u4f7f\u7528\u4e0d\u540c\u7c7b\u578b\u7684\u5f02\u5e38\uff1f"},"content":{"rendered":"

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

\u5982\u4f55 Java \u5f02\u5e38\u5904\u7406\u4e2d\u4f7f\u7528\u4e0d\u540c\u7c7b\u578b\u7684\u5f02\u5e38\uff1f<\/h1>\n

\u6709\u5fd7\u8005\uff0c\u4e8b\u7adf\u6210\uff01\u5982\u679c\u4f60\u5728\u5b66\u4e60\u6587\u7ae0<\/span>\uff0c\u90a3\u4e48\u672c\u6587\u300a\u5982\u4f55 Java \u5f02\u5e38\u5904\u7406\u4e2d\u4f7f\u7528\u4e0d\u540c\u7c7b\u578b\u7684\u5f02\u5e38\uff1f\u300b<\/span>\uff0c\u5c31\u5f88\u9002\u5408\u4f60\uff01\u6587\u7ae0\u8bb2\u89e3\u7684\u77e5\u8bc6\u70b9\u4e3b\u8981\u5305\u62ec<\/span>\uff0c\u82e5\u662f\u4f60\u5bf9\u672c\u6587\u611f\u5174\u8da3\uff0c\u6216\u8005\u662f\u60f3\u641e\u61c2\u5176\u4e2d\u67d0\u4e2a\u77e5\u8bc6\u70b9\uff0c\u5c31\u8bf7\u4f60\u7ee7\u7eed\u5f80\u4e0b\u770b\u5427~<\/span><\/p>\n

\u5728 Java \u4e2d\uff0c\u4e0d\u540c\u7684\u5f02\u5e38\u7c7b\u578b\u7528\u4e8e\u5904\u7406\u7a0b\u5e8f\u6267\u884c\u671f\u95f4\u7684\u9519\u8bef\u548c\u5f02\u5e38\u60c5\u51b5\u3002\u901a\u8fc7\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\uff0ctry-catch \u5757\u548c throws \u5173\u952e\u5b57\uff0c\u53ef\u4ee5\u6839\u636e\u7279\u5b9a\u9700\u6c42\u9ad8\u6548\u5904\u7406\u5f02\u5e38\u3002\u4f8b\u5982\uff0c\u4e00\u4e2a\u8bfb\u53d6\u6587\u4ef6\u7684\u7a0b\u5e8f\u53ef\u4ee5\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u6765\u5904\u7406\u6587\u4ef6\u4e0d\u5b58\u5728\u6216\u635f\u574f\u7684\u60c5\u51b5\uff0c\u6355\u83b7 FileNotFoundException \u548c\u5176\u4ed6\u5f02\u5e38\u3002<\/p>\n

<\/p>\n

\u5982\u4f55 Java \u5f02\u5e38\u5904\u7406\u4e2d\u4f7f\u7528\u4e0d\u540c\u7c7b\u578b\u7684\u5f02\u5e38<\/strong><\/p>\n

\u5728 Java \u4e2d\uff0c\u5f02\u5e38\u5904\u7406\u662f\u4e00\u4e2a\u91cd\u8981\u7684\u673a\u5236\uff0c\u7528\u4e8e\u5904\u7406\u7a0b\u5e8f\u6267\u884c\u671f\u95f4\u53d1\u751f\u7684\u9519\u8bef\u548c\u5f02\u5e38\u60c5\u51b5\u3002\u4e0d\u540c\u7684\u5f02\u5e38\u7c7b\u578b\u7528\u4e8e\u8868\u793a\u5404\u79cd\u7c7b\u578b\u7684\u9519\u8bef\uff0c\u4ece\u800c\u5b9e\u73b0\u9ad8\u6548\u4e14\u53ef\u7ef4\u62a4\u7684\u5f02\u5e38\u5904\u7406\u3002<\/p>\n

\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38<\/strong><\/p>\n

\u5f53\u5185\u7f6e\u7684\u5f02\u5e38\u7c7b\u578b\u65e0\u6cd5\u6ee1\u8db3\u7279\u5b9a\u9700\u6c42\u65f6\uff0c\u53ef\u4ee5\u521b\u5efa\u81ea\u5b9a\u4e49\u5f02\u5e38\u3002\u4f8b\u5982\uff0c\u521b\u5efa\u4e00\u4e2a MyException<\/code> \u7c7b\u6765\u5904\u7406\u81ea\u5b9a\u4e49\u9519\u8bef\uff1a<\/p>\n

public class MyException extends Exception {\n\n    public MyException() {\n        super();\n    }\n\n    public MyException(String message) {\n        super(message);\n    }\n}<\/pre>\n
\u4f7f\u7528 try-catch<\/code> \u5757<\/strong><\/p>\n
try-catch<\/code> \u5757\u7528\u4e8e\u5904\u7406\u7279\u5b9a\u7c7b\u578b\u7684\u5f02\u5e38\u3002\u5b83\u5305\u542b\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801\uff0c\u540e\u8ddf\u4e00\u4e2a\u6216\u591a\u4e2a catch<\/code> \u5757\uff0c\u7528\u4e8e\u6355\u83b7\u7279\u5b9a\u7c7b\u578b\u7684\u5f02\u5e38\u3002\u4f8b\u5982\uff1a<\/p>\n
try {\n    \/\/ \u4ee3\u7801\u53ef\u80fd\u4f1a\u629b\u51fa\u5f02\u5e38\n} catch (MyException e) {\n    \/\/ \u5904\u7406 MyException \u5f02\u5e38\n} catch (Exception e) {\n    \/\/ \u5904\u7406\u6240\u6709\u5176\u4ed6\u7c7b\u578b\u7684\u5f02\u5e38\n}<\/pre>\n
\u4f7f\u7528 throws<\/code> \u5173\u952e\u5b57<\/strong><\/p>\n
throws<\/code> \u5173\u952e\u5b57\u7528\u4e8e\u58f0\u660e\u65b9\u6cd5\u53ef\u80fd\u629b\u51fa\u7684\u5f02\u5e38\u7c7b\u578b\u3002\u8fd9\u4f7f\u8c03\u7528\u8005\u80fd\u591f\u5728\u8c03\u7528\u65b9\u6cd5\u4e4b\u524d\u786e\u5b9a\u548c\u5904\u7406\u6f5c\u5728\u7684\u5f02\u5e38\u3002\u4f8b\u5982\uff1a<\/p>\n
public void myMethod() throws MyException {\n    \/\/ \u4ee3\u7801\u53ef\u80fd\u4f1a\u629b\u51fa MyException \u5f02\u5e38\n}<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u8003\u8651\u4e00\u4e2a\u8bfb\u53d6\u6587\u4ef6\u7684\u7a0b\u5e8f\uff0c\u8be5\u6587\u4ef6\u53ef\u80fd\u4e0d\u5b58\u5728\u6216\u635f\u574f\u3002\u53ef\u4ee5\u4f7f\u7528\u5f02\u5e38\u5904\u7406\u6765\u5904\u7406\u8fd9\u4e24\u4e2a\u573a\u666f\uff1a<\/p>\n
import java.io.File;\nimport java.io.FileNotFoundException;\nimport java.util.Scanner;\n\npublic class FileReadExample {\n\n    public static void main(String[] args) {\n        try {\n            File file = new File(\"sample.txt\");\n            Scanner scanner = new Scanner(file);\n\n            \/\/ \u8bfb\u53d6\u6587\u4ef6\u5185\u5bb9\n            while (scanner.hasNextLine()) {\n                System.out.println(scanner.nextLine());\n            }\n\n            scanner.close();\n        } catch (FileNotFoundException e) {\n            System.out.println(\"File not found\");\n        } catch (Exception e) {\n            System.out.println(\"An error occurred while reading the file\");\n        }\n    }\n}<\/pre>\n
\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u5982\u4f55 Java \u5f02\u5e38\u5904\u7406\u4e2d\u4f7f\u7528\u4e0d\u540c\u7c7b\u578b\u7684\u5f02\u5e38\uff1f\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8ejava,\u5f02\u5e38\u5904\u7406\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55 Java \u5f02\u5e38\u5904\u7406\u4e2d\u4f7f\u7528\u4e0d...<\/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-202740","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202740","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=202740"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202740\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202740"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202740"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202740"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}