{"id":3943,"date":"2025-07-20T11:07:48","date_gmt":"2025-07-20T03:07:48","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3943"},"modified":"2025-07-20T11:07:48","modified_gmt":"2025-07-20T03:07:48","slug":"condition-%e7%9a%84%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86%e4%b8%ad%e6%96%ad%e6%9c%ba%e5%88%b6","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/07\/20\/condition-%e7%9a%84%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86%e4%b8%ad%e6%96%ad%e6%9c%ba%e5%88%b6\/","title":{"rendered":"Condition \u7684\u5f02\u5e38\u5904\u7406\u4e2d\u65ad\u673a\u5236"},"content":{"rendered":"\n<p><code>Condition<\/code> \u7684\u5f02\u5e38\u5904\u7406\u4e2d\u65ad\u673a\u5236\u662f Java \u5e76\u53d1\u7f16\u7a0b\u4e2d\u4e00\u4e2a<strong>\u6781\u4e3a\u91cd\u8981\u4f46\u5bb9\u6613\u88ab\u5ffd\u89c6<\/strong>\u7684\u7ec6\u8282\u3002\u5b83\u6d89\u53ca\u5230\u7ebf\u7a0b\u5728\u7b49\u5f85\uff08<code>await()<\/code>\uff09\u8fc7\u7a0b\u4e2d\uff0c\u5982\u4f55\u6b63\u786e\u54cd\u5e94\u4e2d\u65ad\uff0c\u4ee5\u53ca\u5f00\u53d1\u8005\u5e94\u8be5\u5982\u4f55\u4f18\u96c5\u5904\u7406\u7ebf\u7a0b\u4e2d\u65ad\u3001\u8d44\u6e90\u6e05\u7406\u548c\u72b6\u6001\u6062\u590d\u3002<\/p>\n\n\n\n<p>\u6211\u4eec\u5c06\u4ece\u591a\u4e2a\u7ef4\u5ea6\u8be6\u89e3\uff1a<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001Condition \u7684\u4e2d\u65ad\u5904\u7406\u65b9\u5f0f\u6982\u89c8<\/h2>\n\n\n\n<p>Java \u4e2d <code>Condition<\/code> \u63a5\u53e3\u63d0\u4f9b\u4e86\u591a\u4e2a <code>await()<\/code> \u65b9\u6cd5\uff0c\u5176\u4e2d\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u65b9\u6cd5<\/th><th>\u662f\u5426\u54cd\u5e94\u4e2d\u65ad<\/th><th>\u53ef\u8bbe\u7f6e\u8d85\u65f6<\/th><th>\u53ef\u5904\u7406\u865a\u5047\u5524\u9192<\/th><\/tr><\/thead><tbody><tr><td><code>await()<\/code><\/td><td>\u54cd\u5e94\u4e2d\u65ad<\/td><td>\u274c<\/td><td>\u2705<\/td><\/tr><tr><td><code>await(long time, TimeUnit)<\/code><\/td><td>\u54cd\u5e94\u4e2d\u65ad<\/td><td>\u2705<\/td><td>\u2705<\/td><\/tr><tr><td><code>awaitUninterruptibly()<\/code><\/td><td>\u4e0d\u54cd\u5e94\u4e2d\u65ad<\/td><td>\u274c<\/td><td>\u2705<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u88ab\u4e2d\u65ad\u65f6\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><code>await()<\/code> \u65b9\u6cd5\u4e2d\u65ad\u884c\u4e3a\u6d41\u7a0b\uff1a<\/h3>\n\n\n\n<p>\u5f53\u7ebf\u7a0b\u5728 <code>await()<\/code> \u7b49\u5f85\u671f\u95f4\u88ab\u5176\u4ed6\u7ebf\u7a0b\u8c03\u7528\u4e86 <code>interrupt()<\/code> \u65b9\u6cd5\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u629b\u51fa <code>InterruptedException<\/code> \u5f02\u5e38<\/strong><\/li>\n\n\n\n<li><strong>\u7ebf\u7a0b\u4ece Condition \u7b49\u5f85\u961f\u5217\u79fb\u9664<\/strong><\/li>\n\n\n\n<li><strong>\u7ebf\u7a0b\u4e2d\u65ad\u6807\u5fd7\u4f4d\u88ab\u6e05\u9664\uff08\u6e05\u9664\uff01\uff09<\/strong><\/li>\n<\/ol>\n\n\n\n<h3 class=\"wp-block-heading\">\u793a\u4f8b\uff1a<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>lock.lock();\ntry {\n    condition.await(); \/\/ \u6b64\u5904\u5982\u679c\u88ab\u4e2d\u65ad\uff0c\u4f1a\u7acb\u5373\u629b\u51fa InterruptedException\n    \/\/ \u4e2d\u65ad\u540e\u4ee5\u4e0b\u4ee3\u7801\u4e0d\u4f1a\u6267\u884c\n} catch (InterruptedException e) {\n    System.out.println(\"\u88ab\u4e2d\u65ad\u5566\uff01\");\n    \/\/ \u53ef\u4ee5\u9009\u62e9\u6062\u590d\u4e2d\u65ad\u72b6\u6001\n    Thread.currentThread().interrupt(); \/\/ \u2705 \u53ef\u9009\u6062\u590d\n} finally {\n    lock.unlock();\n}<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u865a\u5047\u5524\u9192\u4e0e\u4e2d\u65ad\u7684\u7ed3\u5408\u5904\u7406\uff08\u63a8\u8350\u6a21\u5f0f\uff09<\/h2>\n\n\n\n<p>\u6761\u4ef6\u7b49\u5f85\u63a8\u8350\u6a21\u5f0f\u4e3a <strong>\u6761\u4ef6+\u5faa\u73af<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>lock.lock();\ntry {\n    while (!\u67d0\u4e2a\u6761\u4ef6\u6210\u7acb) {\n        condition.await(); \/\/ \u53ef\u80fd\u88ab\u4e2d\u65ad\u6216\u865a\u5047\u5524\u9192\n    }\n    \/\/ \u6761\u4ef6\u6210\u7acb\uff0c\u6267\u884c\u903b\u8f91\n} catch (InterruptedException e) {\n    \/\/ \u4e2d\u65ad\u5904\u7406\uff0c\u8bb0\u5f55\u65e5\u5fd7 \/ \u9000\u51fa\u7ebf\u7a0b \/ \u6062\u590d\u4e2d\u65ad\u72b6\u6001\n    Thread.currentThread().interrupt();\n} finally {\n    lock.unlock();\n}<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><code>while<\/code> \u662f\u9632\u6b62\u865a\u5047\u5524\u9192\uff08spurious wakeup\uff09\u7684\u6807\u51c6\u505a\u6cd5\u3002<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u6e90\u7801\u5c42\u9762\u7406\u89e3\u4e2d\u65ad\u68c0\u6d4b\u6d41\u7a0b<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><code>ConditionObject.await()<\/code> \u5185\u90e8\u5173\u952e\u4ee3\u7801\uff1a<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>if (Thread.interrupted()) {\n    throw new InterruptedException();\n}<\/code><\/pre>\n\n\n\n<p>\u4e4b\u540e\u7ebf\u7a0b\u88ab <code>park()<\/code> \u6302\u8d77\uff0c\u5982\u679c\u6b64\u65f6\u88ab\u4e2d\u65ad\uff0c\u5c06\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4ece\u6761\u4ef6\u961f\u5217\u79fb\u51fa<\/li>\n\n\n\n<li>\u8f6c\u5165 AQS \u540c\u6b65\u961f\u5217\uff08\u4e2d\u65ad\u72b6\u6001\u4f18\u5148\u6267\u884c\uff09<\/li>\n\n\n\n<li>\u6216\u5728 AQS \u5185\u90e8\u5224\u65ad\u4e3a\u4e2d\u65ad\uff0c\u63d0\u524d\u5f02\u5e38\u8fd4\u56de<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001\u6062\u590d\u4e2d\u65ad\u72b6\u6001\u7684\u5efa\u8bae<\/h2>\n\n\n\n<p>Java \u4e2d\u65ad\u7684\u8bbe\u8ba1\u662f\u534f\u4f5c\u5f0f\u7684\uff0c\u5982\u679c\u4f60\u6355\u83b7\u4e86 <code>InterruptedException<\/code>\uff0c\u4f46\u51b3\u5b9a\u4e0d\u7acb\u5373\u7ec8\u6b62\u7ebf\u7a0b\uff0c<strong>\u5efa\u8bae\u6062\u590d\u4e2d\u65ad\u72b6\u6001<\/strong>\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>catch (InterruptedException e) {\n    Thread.currentThread().interrupt(); \/\/ \u6062\u590d\u4e2d\u65ad\u72b6\u6001\n}<\/code><\/pre>\n\n\n\n<p>\u5426\u5219\uff0c\u8c03\u7528\u65b9\u6216\u7ebf\u7a0b\u63a7\u5236\u5668\u5c06\u65e0\u6cd5\u518d\u901a\u8fc7 <code>Thread.isInterrupted()<\/code> \u5224\u65ad\u4e2d\u65ad\u72b6\u6001\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u516d\u3001\u4e3a\u4ec0\u4e48\u4e0d\u8981\u7528 <code>awaitUninterruptibly()<\/code> \u968f\u4fbf\u5c4f\u853d\u4e2d\u65ad\uff1f<\/h2>\n\n\n\n<p>\u867d\u7136\u5b83\u4e0d\u4f1a\u629b\u5f02\u5e38\u3001\u4e5f\u4e0d\u4f1a\u54cd\u5e94\u4e2d\u65ad\uff0c\u4f46\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5bb9\u6613\u5bfc\u81f4\u7ebf\u7a0b\u6c38\u4e45\u6302\u8d77\u6216\u6b7b\u9501\uff1b<\/li>\n\n\n\n<li>\u4e0d\u5229\u4e8e\u4efb\u52a1\u53d6\u6d88\/\u7ebf\u7a0b\u6c60\u56de\u6536\uff1b<\/li>\n\n\n\n<li>\u901a\u5e38\u4ec5\u5728\u7279\u5b9a\u573a\u666f\u4e0b\uff08\u5982 finally \u4e2d\u5f3a\u5236\u7b49\u5f85\u8d44\u6e90\uff09\u624d\u63a8\u8350\u4f7f\u7528\u3002<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e03\u3001Condition \u4e2d\u65ad\u5904\u7406 vs Object.wait()<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u6027<\/th><th>Condition.await()<\/th><th>Object.wait()<\/th><\/tr><\/thead><tbody><tr><td>\u629b\u5f02\u5e38<\/td><td>\u629b\u51fa <code>InterruptedException<\/code><\/td><td>\u629b\u51fa <code>InterruptedException<\/code><\/td><\/tr><tr><td>\u4e2d\u65ad\u72b6\u6001\u6062\u590d<\/td><td>\u81ea\u52a8\u6e05\u9664<\/td><td>\u81ea\u52a8\u6e05\u9664<\/td><\/tr><tr><td>\u63a8\u8350\u6062\u590d\u4e2d\u65ad\u72b6\u6001<\/td><td>\u63a8\u8350<\/td><td>\u63a8\u8350<\/td><\/tr><tr><td>\u66f4\u4e30\u5bcc\u7684\u7b49\u5f85\u63a7\u5236\u65b9\u6cd5<\/td><td>\u652f\u6301\u9650\u65f6\u3001\u975e\u4e2d\u65ad\u7b49<\/td><td>\u8f83\u5c11<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u516b\u3001\u5b98\u65b9\u6587\u6863\u4e0e\u6743\u5a01\u8d44\u6599<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/docs.oracle.com\/javase\/8\/docs\/api\/java\/util\/concurrent\/locks\/Condition.html\">Java Doc &#8211; java.util.concurrent.locks.Condition<\/a><\/li>\n\n\n\n<li>\u300aJava \u5e76\u53d1\u7f16\u7a0b\u5b9e\u6218\u300b \u2014 \u7b2c 14 \u7ae0<\/li>\n\n\n\n<li>\u300aEffective Java\u300b\u7b2c\u4e09\u7248 Item 44: \u4f18\u5148\u4f7f\u7528\u6807\u51c6\u673a\u5236\u5904\u7406\u4e2d\u65ad<\/li>\n\n\n\n<li> <a href=\"https:\/\/github.com\/openjdk\/jdk\/blob\/master\/src\/java.base\/share\/classes\/java\/util\/concurrent\/locks\/AbstractQueuedSynchronizer.java\">OpenJDK AQS \u5b9e\u73b0\u6e90\u7801<\/a><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u603b\u7ed3\u53e3\u8bc0<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><code>await<\/code> \u80fd\u54cd\u5e94\u4e2d\u65ad\uff0c\u5f02\u5e38\u629b\u51fa\u72b6\u6001\u6e05\uff1b<br>\u6355\u83b7\u522b\u5fd8\u91cd\u7f6e\u5b83\uff0c\u534f\u4f5c\u7ec8\u6b62\u624d\u6587\u660e\u3002<br><code>while<\/code> \u914d\u5957\u505a\u7b49\u5f85\uff0c\u865a\u5047\u5524\u9192\u9760\u5b83\u884c\u3002<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u66f4\u591a\u8be6\u7ec6\u5185\u5bb9\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Condition \u7684\u5f02\u5e38\u5904\u7406\u4e2d\u65ad\u673a\u5236\u662f Java \u5e76\u53d1\u7f16\u7a0b\u4e2d\u4e00\u4e2a\u6781\u4e3a\u91cd\u8981\u4f46\u5bb9\u6613\u88ab\u5ffd\u89c6\u7684\u7ec6\u8282\u3002\u5b83\u6d89\u53ca\u5230\u7ebf\u7a0b\u5728\u7b49 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3944,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[68,86],"tags":[],"class_list":["post-3943","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java","category-java-"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3943","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=3943"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3943\/revisions"}],"predecessor-version":[{"id":3945,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3943\/revisions\/3945"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/3944"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=3943"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=3943"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=3943"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}