{"id":202776,"date":"2025-05-22T11:00:48","date_gmt":"2025-05-22T03:00:48","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202776\/"},"modified":"2025-05-22T11:00:48","modified_gmt":"2025-05-22T03:00:48","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-java-%e4%b8%ad%e4%bd%bf%e7%94%a8%e5%bc%82%e5%b8%b8%e6%9d%a5%e8%ae%b0%e5%bd%95%e5%92%8c%e6%8a%a5%e5%91%8a%e9%94%99%e8%af%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202776\/","title":{"rendered":"\u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528\u5f02\u5e38\u6765\u8bb0\u5f55\u548c\u62a5\u544a\u9519\u8bef\uff1f"},"content":{"rendered":"

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

\u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528\u5f02\u5e38\u6765\u8bb0\u5f55\u548c\u62a5\u544a\u9519\u8bef\uff1f<\/h1>\n

\u76ee\u524d\u4e0a\u5df2\u7ecf\u6709\u5f88\u591a\u5173\u4e8e\u6587\u7ae0<\/span>\u7684\u6587\u7ae0\u4e86\uff0c\u81ea\u5df1\u5728\u521d\u6b21\u9605\u8bfb\u8fd9\u4e9b\u6587\u7ae0\u4e2d\uff0c\u4e5f\u89c1\u8bc6\u5230\u4e86\u5f88\u591a\u5b66\u4e60\u601d\u8def\uff1b\u90a3\u4e48\u672c\u6587\u300a\u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528\u5f02\u5e38\u6765\u8bb0\u5f55\u548c\u62a5\u544a\u9519\u8bef\uff1f\u300b<\/span>\uff0c\u4e5f\u5e0c\u671b\u80fd\u5e2e\u52a9\u5230\u5927\u5bb6\uff0c\u5982\u679c\u9605\u8bfb\u5b8c\u540e\u771f\u7684\u5bf9\u4f60\u5b66\u4e60\u6587\u7ae0<\/span>\u6709\u5e2e\u52a9\uff0c\u6b22\u8fce\u52a8\u52a8\u624b\u6307\uff0c\u8bc4\u8bba\u7559\u8a00\u5e76\u5206\u4eab~<\/p>\n

Java\u4e2d\u7684\u5f02\u5e38\u5904\u7406\u901a\u8fc7\u629b\u51fa\u548c\u6355\u6349\u5f02\u5e38\u6765\u5904\u7406\u9519\u8bef\u3002\u629b\u51fa\u5f02\u5e38\u4f7f\u7528throw\u5173\u952e\u5b57\uff0c\u6355\u6349\u5f02\u5e38\u4f7f\u7528try-catch\u7ed3\u6784\u3002\u53ef\u4ee5\u4f7f\u7528\u65e5\u5fd7\u8bb0\u5f55\u6846\u67b6\u8bb0\u5f55\u5f02\u5e38\u8be6\u7ec6\u4fe1\u606f\uff0c\u5e76\u4f7f\u7528\u81ea\u5b9a\u4e49\u8f6c\u6362\u5668\u683c\u5f0f\u5316\u5f02\u5e38\u8be6\u7ec6\u4fe1\u606f\u3002\u5728\u5b9e\u6218\u4e2d\uff0c\u5f02\u5e38\u53ef\u7528\u4e8e\u62a5\u544a\u6587\u4ef6\u89e3\u6790\u9519\u8bef\uff0c\u4e3b\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u6839\u636e\u5f02\u5e38\u91c7\u53d6\u76f8\u5e94\u7684\u63aa\u65bd\u3002<\/p>\n

<\/p>\n

\u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528\u5f02\u5e38\u6765\u8bb0\u5f55\u548c\u62a5\u544a\u9519\u8bef<\/strong><\/p>\n

\u5f02\u5e38\u662f Java \u4e2d\u5904\u7406\u9519\u8bef\u7684\u5f3a\u5927\u673a\u5236\u3002\u901a\u8fc7\u629b\u51fa\u5f02\u5e38\uff0c\u4f60\u53ef\u4ee5\u5c06\u9519\u8bef\u7684\u8be6\u7ec6\u4fe1\u606f\u4f20\u9012\u5230\u7a0b\u5e8f\u7684\u5176\u4ed6\u90e8\u5206\uff0c\u4ee5\u4fbf\u5b83\u4eec\u91c7\u53d6\u9002\u5f53\u7684\u63aa\u65bd\u3002<\/p>\n

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

\u8981\u629b\u51fa\u5f02\u5e38\uff0c\u53ef\u4ee5\u4f7f\u7528 throw<\/code> \u5173\u952e\u5b57\u3002\u5f02\u5e38\u5bf9\u8c61\u662f\u7ee7\u627f\u81ea Throwable<\/code> \u7c7b\u7684\u5b9e\u4f8b\u3002\u4f8b\u5982\uff0c\u4ee5\u4e0b\u4ee3\u7801\u629b\u51fa\u4e00\u4e2a IllegalArgumentException<\/code>\uff1a<\/p>\n

if (argument < 0) {\n  throw new IllegalArgumentException(\"\u53c2\u6570\u5fc5\u987b\u5927\u4e8e 0\");\n}<\/pre>\n
\u6355\u6349\u5f02\u5e38<\/strong><\/p>\n
\u4f7f\u7528 try-catch<\/code> \u7ed3\u6784\u53ef\u4ee5\u6355\u6349\u5f02\u5e38\u3002try<\/code> \u5757\u5305\u542b\u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801\uff0ccatch<\/code> \u5757\u5305\u542b\u5904\u7406\u5f02\u5e38\u7684\u4ee3\u7801\u3002\u4f8b\u5982\uff1a<\/p>\n
try {\n  \/\/ \u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801\n} catch (IllegalArgumentException e) {\n  \/\/ \u5904\u7406 IllegalArgumentException \u5f02\u5e38\n} catch (Exception e) {\n  \/\/ \u5904\u7406\u6240\u6709\u5176\u4ed6\u5f02\u5e38\n}<\/pre>\n
\u8bb0\u5f55\u548c\u62a5\u544a\u5f02\u5e38<\/strong><\/p>\n
\u5728\u6355\u83b7\u5f02\u5e38\u540e\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u65e5\u5fd7\u8bb0\u5f55\u6846\u67b6\uff08\u5982 Log4j \u6216 SLF4j\uff09\u8bb0\u5f55\u5f02\u5e38\u8be6\u7ec6\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u4f7f\u7528 Log4j 2 \u7684\u4ee3\u7801\uff1a<\/p>\n
import org.apache.logging.log4j.LogManager;\nimport org.apache.logging.log4j.Logger;\n\n...\n\nLogger logger = LogManager.getLogger(MyClass.class);\ntry {\n  \/\/ \u53ef\u80fd\u629b\u51fa\u5f02\u5e38\u7684\u4ee3\u7801\n} catch (IllegalArgumentException e) {\n  logger.error(\"\u9047\u5230\u4e86 IllegalArgumentException:\", e);\n}<\/pre>\n
\u4f60\u8fd8\u53ef\u4ee5\u4f7f\u7528\u81ea\u5b9a\u4e49\u6d88\u606f\u8f6c\u6362\u5668\u683c\u5f0f\u5316\u5f02\u5e38\u8be6\u7ec6\u4fe1\u606f\u3002\u4f8b\u5982\uff0c\u8be5\u4ee3\u7801\u4f7f\u7528 ExceptionUtils<\/code> \u7c7b\u4ece\u5f02\u5e38\u4e2d\u83b7\u53d6\u8be6\u7ec6\u7684\u5806\u6808\u8ddf\u8e2a\uff1a<\/p>\n
logger.error(\"\u9047\u5230\u4e86 IllegalArgumentException: \\n{}\", ExceptionUtils.getStackTrace(e));<\/pre>\n
\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n
\u8003\u8651\u4e00\u4e2a\u6587\u4ef6\u89e3\u6790\u5e94\u7528\u7a0b\u5e8f\uff0c\u5b83\u5c06\u6587\u672c\u6587\u4ef6\u89e3\u6790\u4e3a\u5bf9\u8c61\u3002\u5982\u679c\u6587\u4ef6\u5b58\u5728\u8bed\u6cd5\u9519\u8bef\uff0c\u5e94\u7528\u7a0b\u5e8f\u5e94\u8be5\u629b\u51fa\u4e00\u4e2a ParseException<\/code> \u5f02\u5e38\u3002<\/p>\n
\u4e3b\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u6355\u6349\u8be5\u5f02\u5e38\u5e76\u6839\u636e\u9700\u8981\u91c7\u53d6\u63aa\u65bd\uff0c\u4f8b\u5982\uff1a<\/p>\n
    \n
  • \u8bb0\u5f55\u9519\u8bef\u8be6\u7ec6\u4fe1\u606f<\/li>\n
  • \u63d0\u793a\u7528\u6237\u4fee\u590d\u6587\u4ef6<\/li>\n
  • \u7ec8\u6b62\u5e94\u7528\u7a0b\u5e8f<\/li>\n<\/ul>\n
    import java.io.File;\nimport java.io.FileNotFoundException;\nimport java.io.IOException;\nimport java.util.Scanner;\n\npublic class FileParser {\n\n  public static void main(String[] args) {\n    File file = new File(\"input.txt\");\n    try {\n      parseFile(file);\n    } catch (FileNotFoundException e) {\n      System.err.println(\"\u6587\u4ef6\u4e0d\u5b58\u5728: \" + e.getMessage());\n    } catch (ParseException e) {\n      System.err.println(\"\u6587\u4ef6\u8bed\u6cd5\u6709\u8bef: \" + e.getMessage());\n    } catch (IOException e) {\n      System.err.println(\"\u6587\u4ef6\u8bfb\u53d6\u5931\u8d25: \" + e.getMessage());\n    }\n  }\n\n  public static void parseFile(File file) throws ParseException, IOException {\n    try (Scanner scanner = new Scanner(file)) {\n      \/\/ \u89e3\u6790\u6587\u4ef6\n    } catch (IOException e) {\n      throw new ParseException(\"\u6587\u4ef6\u8bfb\u53d6\u5931\u8d25: \" + e.getMessage());\n    }\n  }\n\n  public static class ParseException extends Exception {\n\n    public ParseException(String message) {\n      super(message);\n    }\n  }\n}<\/pre>\n
    \u6587\u4e2d\u5173\u4e8ejava,\u5f02\u5e38\u5904\u7406\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300a\u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528\u5f02\u5e38\u6765\u8bb0\u5f55\u548c\u62a5\u544a\u9519\u8bef\uff1f\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5982\u4f55\u5728 Java \u4e2d\u4f7f\u7528\u5f02\u5e38\u6765\u8bb0...<\/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-202776","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202776","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=202776"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202776\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202776"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202776"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202776"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}