{"id":46928,"date":"2024-12-02T08:42:09","date_gmt":"2024-12-02T00:42:09","guid":{"rendered":"https:\/\/fwq.ai\/blog\/46928\/"},"modified":"2024-12-02T08:42:09","modified_gmt":"2024-12-02T00:42:09","slug":"%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e5%9c%a8java%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86%e4%b8%ad%e7%9a%84%e7%ae%80%e6%b4%81%e5%ba%94%e7%94%a8","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/46928\/","title":{"rendered":"\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728Java\u5f02\u5e38\u5904\u7406\u4e2d\u7684\u7b80\u6d01\u5e94\u7528"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728Java\u5f02\u5e38\u5904\u7406\u4e2d\u7684\u7b80\u6d01\u5e94\u7528<\/h1>\n<p>\u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728Java\u5f02\u5e38\u5904\u7406\u4e2d\u7684\u7b80\u6d01\u5e94\u7528\u300b<\/span>\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\uff0c\u6216\u8005\u662f\u5bf9<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01<\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728 Java \u5f02\u5e38\u5904\u7406\u4e2d\u63d0\u4f9b\u4e86\u7b80\u6d01\u9ad8\u6548\u7684\u66ff\u4ee3\u65b9\u6848\uff1aLambda \u4f53\u53ef\u629b\u51fa\u68c0\u67e5\u6027\u5f02\u5e38\uff0c\u5141\u8bb8\u521b\u5efa\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u51fd\u6570\u3002\u4e0e\u4f20\u7edf\u65b9\u6cd5\u76f8\u6bd4\uff0c\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u4ee3\u7801\u66f4\u7b80\u6d01\uff0c\u7c7b\u578b\u5b89\u5168\u6027\u548c\u53ef\u7ec4\u5408\u6027\u66f4\u9ad8\u3002\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u6216\u65b9\u6cd5\u5f15\u7528\u521b\u5efa\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u51fd\u6570\uff0c\u5e76\u5229\u7528 try-with-resources \u8bed\u53e5\u6b63\u786e\u5173\u95ed\u8d44\u6e90\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729936296671cbba848cac.jpg\" class=\"aligncenter\" title=\"\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728Java\u5f02\u5e38\u5904\u7406\u4e2d\u7684\u7b80\u6d01\u5e94\u7528\u63d2\u56fe\" alt=\"\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728Java\u5f02\u5e38\u5904\u7406\u4e2d\u7684\u7b80\u6d01\u5e94\u7528\u63d2\u56fe\" \/><\/p>\n<p><strong>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728 Java \u5f02\u5e38\u5904\u7406\u4e2d\u7684\u7b80\u6d01\u5e94\u7528<\/strong><\/p>\n<p><strong>\u5f15\u8a00<\/strong><\/p>\n<p>Java \u4e2d\u4f20\u7edf\u7684\u5f02\u5e38\u5904\u7406\u65b9\u6cd5\u5f80\u5f80\u5197\u957f\u4e14\u5bb9\u6613\u51fa\u9519\u3002\u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u4f9b\u4e86\u7b80\u6d01\u9ad8\u6548\u7684\u66ff\u4ee3\u65b9\u6848\uff0c\u8ba9\u6211\u4eec\u53ef\u4ee5\u66f4\u4f18\u96c5\u5730\u5904\u7406\u5f02\u5e38\u3002<\/p>\n<p><strong>\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406<\/strong><\/p>\n<p>Lambda \u8868\u8fbe\u5f0f\u4e2d\u7684 lambda \u4f53\u53ef\u4ee5\u629b\u51fa\u68c0\u67e5\u6027\u5f02\u5e38\uff0c\u7c7b\u4f3c\u4e8e\u65b9\u6cd5\u4f53\u3002\u6709\u4e86\u5b83\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u6765\u521b\u5efa\u4e00\u4e2a\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u51fd\u6570\uff1a<\/p>\n<pre>@FunctionalInterface\npublic interface ExceptionFunction&lt;T, R&gt; {\n  R apply(T t) throws Exception;\n}<\/pre>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u8003\u8651\u4ee5\u4e0b\u4f7f\u7528\u4f20\u7edf\u65b9\u6cd5\u5904\u7406\u5f02\u5e38\u7684\u4ee3\u7801\uff1a<\/p>\n<pre>try {\n  int result = doSomethingThatMightThrow();\n} catch (Exception e) {\n  \/\/ \u5904\u7406\u5f02\u5e38\n}<\/pre>\n<p>\u53ef\u4ee5\u7528\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u51fd\u6570\u91cd\u5199\u6b64\u4ee3\u7801\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>ExceptionFunction&lt;Integer, Integer&gt; safeDoSomething = i -&gt; doSomethingThatMightThrow;\ntry {\n  int result = safeDoSomething.apply(someInput);\n} catch (Exception e) {\n  \/\/ \u5904\u7406\u5f02\u5e38\n}<\/pre>\n<p><strong>\u597d\u5904<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u7684\u4e3b\u8981\u597d\u5904\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><strong>\u7b80\u6d01\u6027\uff1a<\/strong>lambda \u8868\u8fbe\u5f0f\u7b80\u5316\u4e86\u5f02\u5e38\u5904\u7406\u4ee3\u7801\u3002<\/li>\n<li><strong>\u7c7b\u578b\u5b89\u5168\u6027\uff1a<\/strong>lambda \u4f53\u58f0\u660e\u4e86\u629b\u51fa\u7684\u5f02\u5e38\u3002<\/li>\n<li><strong>\u7ec4\u5408\u6027\uff1a<\/strong>\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u51fd\u6570\u53ef\u4ee5\u8f7b\u677e\u7ec4\u5408\u4ee5\u521b\u5efa\u66f4\u590d\u6742\u7684\u5904\u7406\u903b\u8f91\u3002<\/li>\n<\/ul>\n<p><strong>\u4f7f\u7528\u6280\u5de7<\/strong><\/p>\n<ul>\n<li>\u8003\u8651\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u6216\u65b9\u6cd5\u5f15\u7528\u6765\u521b\u5efa\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u51fd\u6570\u3002<\/li>\n<li>\u4f7f\u7528 try-with-resources \u8bed\u53e5\u6765\u786e\u4fdd\u8d44\u6e90\u5df2\u6b63\u786e\u5173\u95ed\u3002<\/li>\n<li>\u907f\u514d\u6355\u83b7\u5e76\u91cd\u65b0\u629b\u51fa\u5f02\u5e38\uff0c\u56e0\u4e3a\u8fd9\u4f1a\u63a9\u76d6\u9519\u8bef\u7684\u6839\u6e90\u3002<\/li>\n<\/ul>\n<p><strong>\u7ed3\u8bba<\/strong><\/p>\n<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u4f9b\u4e86\u7b80\u6d01\u9ad8\u6548\u7684\u65b9\u6cd5\u6765\u5904\u7406 Java \u4e2d\u7684\u5f02\u5e38\u3002\u901a\u8fc7\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u548c\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u51fd\u6570\uff0c\u6211\u4eec\u53ef\u4ee5\u7f16\u5199\u66f4\u4f18\u96c5\u7684\u4ee3\u7801\uff0c\u540c\u65f6\u4fdd\u6301\u7c7b\u578b\u5b89\u5168\u6027\u5e76\u63d0\u9ad8\u53ef\u7ec4\u5408\u6027\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u672c\u6587\u5230\u6b64\u7ed3\u675f\uff0c\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u300a\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728Java\u5f02\u5e38\u5904\u7406\u4e2d\u7684\u7b80\u6d01\u5e94\u7528\u300b\uff0c\u5e0c\u671b\u672c\u6587\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff01\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff0c\u7ed9\u5927\u5bb6\u5206\u4eab\u66f4\u591a\u6587\u7ae0\u77e5\u8bc6\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728Java\u5f02\u5e38\u5904\u7406\u4e2d\u7684\u7b80\u6d01\u5e94\u7528 \u73cd\u60dc\u65f6\u95f4\uff0c\u52e4\u594b\u5b66\u4e60\uff01\u4eca\u5929\u7ed9\u5927\u5bb6\u5e26\u6765\u300a\u51fd\u6570\u5f0f\u7f16\u7a0b\u5728Java\u5f02\u5e38\u5904\u7406\u4e2d\u7684\u7b80\u6d01\u5e94\u7528\u300b\uff0c\u6b63\u6587\u5185\u5bb9\u4e3b\u8981\u6d89\u53ca\u5230\u7b49\u7b49\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6587\u7ae0\uff0c\u6216\u8005\u662f\u5bf9\u6587\u7ae0\u6709\u7591\u95ee\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u6211\uff01\u540e\u9762\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u5185\u5bb9\u7684\uff0c\u5e0c\u671b\u90fd\u80fd\u5e2e\u5230\u6b63\u5728\u5b66\u4e60\u7684\u5927\u5bb6\uff01 \u51fd\u6570\u5f0f\u7f16\u7a0b\u5728 Java \u5f02\u5e38\u5904\u7406\u4e2d\u63d0\u4f9b\u4e86\u7b80\u6d01\u9ad8\u6548\u7684\u66ff\u4ee3\u65b9\u6848\uff1aLambda \u4f53\u53ef\u629b\u51fa\u68c0\u67e5\u6027\u5f02\u5e38\uff0c\u5141\u8bb8\u521b\u5efa\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u51fd\u6570\u3002\u4e0e\u4f20\u7edf\u65b9\u6cd5\u76f8\u6bd4\uff0c\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u4ee3\u7801\u66f4\u7b80\u6d01\uff0c\u7c7b\u578b\u5b89\u5168\u6027\u548c\u53ef\u7ec4\u5408\u6027\u66f4\u9ad8\u3002\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u6216\u65b9\u6cd5\u5f15\u7528\u521b\u5efa\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u51fd\u6570\uff0c\u5e76\u5229\u7528 try-with-resources \u8bed\u53e5\u6b63\u786e\u5173\u95ed\u8d44\u6e90\u3002 \u51fd\u6570\u5f0f\u7f16\u7a0b\u5728 Java \u5f02\u5e38\u5904\u7406\u4e2d\u7684\u7b80\u6d01\u5e94\u7528 \u5f15\u8a00 Java \u4e2d\u4f20\u7edf\u7684\u5f02\u5e38\u5904\u7406\u65b9\u6cd5\u5f80\u5f80\u5197\u957f\u4e14\u5bb9\u6613\u51fa\u9519\u3002\u51fd\u6570\u5f0f\u7f16\u7a0b\u63d0\u4f9b\u4e86\u7b80\u6d01\u9ad8\u6548\u7684\u66ff\u4ee3\u65b9\u6848\uff0c\u8ba9\u6211\u4eec\u53ef\u4ee5\u66f4\u4f18\u96c5\u5730\u5904\u7406\u5f02\u5e38\u3002 \u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406 Lambda \u8868\u8fbe\u5f0f\u4e2d\u7684 lambda \u4f53\u53ef\u4ee5\u629b\u51fa\u68c0\u67e5\u6027\u5f02\u5e38\uff0c\u7c7b\u4f3c\u4e8e\u65b9\u6cd5\u4f53\u3002\u6709\u4e86\u5b83\uff0c\u6211\u4eec\u53ef\u4ee5\u8f7b\u677e\u5730\u4f7f\u7528 lambda \u8868\u8fbe\u5f0f\u6765\u521b\u5efa\u4e00\u4e2a\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u51fd\u6570\uff1a @FunctionalInterface public interface ExceptionFunction&lt;T, R&gt; { R apply(T t) throws Exception; } \u5b9e\u6218\u6848\u4f8b \u8003\u8651\u4ee5\u4e0b\u4f7f\u7528\u4f20\u7edf\u65b9\u6cd5\u5904\u7406\u5f02\u5e38\u7684\u4ee3\u7801\uff1a try { int result = doSomethingThatMightThrow(); } catch (Exception e) { \/\/ \u5904\u7406\u5f02\u5e38 } \u53ef\u4ee5\u7528\u51fd\u6570\u5f0f\u5f02\u5e38\u5904\u7406\u51fd\u6570\u91cd\u5199\u6b64\u4ee3\u7801\uff0c\u5982\u4e0b\u6240\u793a\uff1a ExceptionFunction&lt;Integer, Integer&gt; safeDoSomething [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-46928","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/46928","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=46928"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/46928\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=46928"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=46928"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=46928"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}