{"id":3871,"date":"2025-07-12T13:36:09","date_gmt":"2025-07-12T05:36:09","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=3871"},"modified":"2025-07-12T13:36:09","modified_gmt":"2025-07-12T05:36:09","slug":"wait%e5%92%8cnotify%e8%bf%99%e4%b8%aa%e4%b8%ba%e4%bb%80%e4%b9%88%e8%a6%81%e5%9c%a8synchronized%e4%bb%a3%e7%a0%81%e5%9d%97%e4%b8%ad%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/07\/12\/wait%e5%92%8cnotify%e8%bf%99%e4%b8%aa%e4%b8%ba%e4%bb%80%e4%b9%88%e8%a6%81%e5%9c%a8synchronized%e4%bb%a3%e7%a0%81%e5%9d%97%e4%b8%ad%ef%bc%9f\/","title":{"rendered":"wait\u548cnotify\u8fd9\u4e2a\u4e3a\u4ec0\u4e48\u8981\u5728synchronized\u4ee3\u7801\u5757\u4e2d\uff1f"},"content":{"rendered":"\n<p>\u4e0b\u9762\u4ece\u591a\u4e2a\u7ef4\u5ea6\uff0c\u5168\u9762\u8be6\u7ec6\u5730\u8bb2\u89e3 Java \u4e2d\u7684 <code>lock<\/code>\uff08\u4ee5 <code>ReentrantLock<\/code> \u4e3a\u4ee3\u8868\uff09\u548c <code>synchronized<\/code> \u7684\u533a\u522b\uff0c\u5305\u542b\u539f\u7406\u3001\u6027\u80fd\u3001\u7528\u6cd5\u548c\u9002\u7528\u573a\u666f\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u57fa\u672c\u6982\u5ff5<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u65b9\u9762<\/th><th><code>synchronized<\/code><\/th><th><code>Lock<\/code>\uff08\u901a\u5e38\u6307 <code>ReentrantLock<\/code>\uff09<\/th><\/tr><\/thead><tbody><tr><td>\u8bed\u6cd5<\/td><td>Java \u5173\u952e\u5b57\uff0c\u5185\u7f6e\u8bed\u8a00\u7ed3\u6784<\/td><td>\u63a5\u53e3\u548c\u5b9e\u73b0\u7c7b\uff0cJava.util.concurrent.locks \u5305<\/td><\/tr><tr><td>\u529f\u80fd<\/td><td>\u7528\u4e8e\u540c\u6b65\u4ee3\u7801\u5757\u6216\u65b9\u6cd5\uff0c\u4fdd\u8bc1\u7ebf\u7a0b\u4e92\u65a5\u6267\u884c<\/td><td>\u63d0\u4f9b\u66f4\u7075\u6d3b\u7684\u9501\u673a\u5236\uff0c\u652f\u6301\u516c\u5e73\u9501\u3001\u53ef\u4e2d\u65ad\u9501\u7b49<\/td><\/tr><tr><td>\u51fa\u73b0\u65f6\u95f4<\/td><td>Java 1.0 \u5c31\u6709<\/td><td>Java 5 \u5f15\u5165<\/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\u8be6\u7ec6\u533a\u522b<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u6bd4\u8f83\u7ef4\u5ea6<\/th><th><code>synchronized<\/code><\/th><th><code>ReentrantLock<\/code><\/th><\/tr><\/thead><tbody><tr><td><strong>\u9501\u7c7b\u578b<\/strong><\/td><td>\u5185\u7f6e\u9501\uff08\u76d1\u89c6\u5668\u9501\uff0cMonitor Lock\uff09<\/td><td>\u663e\u5f0f\u9501\uff08\u57fa\u4e8e AQS \u5b9e\u73b0\u7684\u53ef\u91cd\u5165\u72ec\u5360\u9501\uff09<\/td><\/tr><tr><td><strong>\u7075\u6d3b\u6027<\/strong><\/td><td>\u53ea\u80fd\u9501\u6574\u4e2a\u65b9\u6cd5\u6216\u4ee3\u7801\u5757<\/td><td>\u63d0\u4f9b\u66f4\u591a\u65b9\u6cd5\u5982 <code>lockInterruptibly()<\/code>\u3001<code>tryLock()<\/code><\/td><\/tr><tr><td><strong>\u53ef\u4e2d\u65ad\u6027<\/strong><\/td><td>\u4e0d\u652f\u6301\u4e2d\u65ad\u7b49\u5f85\u9501\uff08\u963b\u585e\u4e0d\u53ef\u4e2d\u65ad\uff09<\/td><td>\u652f\u6301\u53ef\u4e2d\u65ad\u9501\u8bf7\u6c42\uff0c\u8c03\u7528\u7ebf\u7a0b\u53ef\u88ab\u4e2d\u65ad<\/td><\/tr><tr><td><strong>\u516c\u5e73\u9501\u652f\u6301<\/strong><\/td><td>\u4e0d\u652f\u6301\u516c\u5e73\u9501<\/td><td>\u652f\u6301\u516c\u5e73\u9501\u548c\u975e\u516c\u5e73\u9501\uff08\u9ed8\u8ba4\u975e\u516c\u5e73\uff09<\/td><\/tr><tr><td><strong>\u9501\u91ca\u653e\u65b9\u5f0f<\/strong><\/td><td>JVM \u81ea\u52a8\u91ca\u653e\u9501\uff08\u4ee3\u7801\u5757\u7ed3\u675f\u81ea\u52a8\u91ca\u653e\uff09<\/td><td>\u9700\u624b\u52a8\u8c03\u7528 <code>unlock()<\/code> \u91ca\u653e\uff0c\u5bb9\u6613\u5fd8\u8bb0\u5bfc\u81f4\u6b7b\u9501<\/td><\/tr><tr><td><strong>\u6027\u80fd<\/strong><\/td><td>JDK 1.6+ \u5f15\u5165\u504f\u5411\u9501\u3001\u8f7b\u91cf\u7ea7\u9501\u4f18\u5316\uff0c\u6027\u80fd\u63d0\u5347\u663e\u8457<\/td><td>\u6027\u80fd\u7a33\u5b9a\uff0c\u590d\u6742\u573a\u666f\u4e0b\u6709\u4f18\u52bf<\/td><\/tr><tr><td><strong>\u6b7b\u9501\u68c0\u6d4b<\/strong><\/td><td>JVM \u4e0d\u63d0\u4f9b\u663e\u5f0f\u6b7b\u9501\u68c0\u6d4b<\/td><td>\u53ef\u7528 API \u67e5\u8be2\u662f\u5426\u88ab\u6301\u6709\uff0c\u53ef\u5b9e\u73b0\u6b7b\u9501\u68c0\u6d4b<\/td><\/tr><tr><td><strong>\u6761\u4ef6\u53d8\u91cf\u652f\u6301<\/strong><\/td><td>\u901a\u8fc7 <code>wait()\/notify()\/notifyAll()<\/code> \u5b9e\u73b0\u7ebf\u7a0b\u901a\u4fe1<\/td><td>\u901a\u8fc7 <code>Condition<\/code> \u5bf9\u8c61\u5b9e\u73b0\u591a\u6761\u4ef6\u7b49\u5f85\/\u901a\u77e5<\/td><\/tr><tr><td><strong>\u91cd\u5165\u6027<\/strong><\/td><td>\u90fd\u662f\u53ef\u91cd\u5165\u9501<\/td><td>\u90fd\u662f\u53ef\u91cd\u5165\u9501<\/td><\/tr><tr><td><strong>\u5f02\u5e38\u5904\u7406<\/strong><\/td><td>\u9501\u91ca\u653e\u81ea\u52a8\uff0c\u5f02\u5e38\u629b\u51fa\u4e0d\u4f1a\u5f71\u54cd\u9501\u91ca\u653e<\/td><td>\u5fc5\u987b\u5728 finally \u4e2d\u91ca\u653e\u9501\uff0c\u5426\u5219\u53ef\u80fd\u6b7b\u9501<\/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\">\u4e09\u3001\u4f7f\u7528\u793a\u4f8b\u5bf9\u6bd4<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1. synchronized<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>public synchronized void syncMethod() {\n    \/\/ \u4ee3\u7801\u5757\u88ab\u9501\u4fdd\u62a4\n}<\/code><\/pre>\n\n\n\n<p>\u6216<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>public void syncBlock() {\n    synchronized (this) {\n        \/\/ \u4ee3\u7801\u5757\u88ab\u9501\u4fdd\u62a4\n    }\n}<\/code><\/pre>\n\n\n\n<p>\u9501\u91ca\u653e\u81ea\u52a8\u53d1\u751f\uff0c\u65e0\u9700\u663e\u5f0f\u4ee3\u7801\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">2. ReentrantLock<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>private final ReentrantLock lock = new ReentrantLock();\n\npublic void lockMethod() {\n    lock.lock();\n    try {\n        \/\/ \u4ee3\u7801\u5757\u88ab\u9501\u4fdd\u62a4\n    } finally {\n        lock.unlock();  \/\/ \u5fc5\u987b\u91ca\u653e\u9501\n    }\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\">\u56db\u3001\u6027\u80fd\u6bd4\u8f83<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u65e9\u671f\uff08JDK 1.5 \u4e4b\u524d\uff09<code>synchronized<\/code>\u6027\u80fd\u8f83\u5dee\uff0c<code>ReentrantLock<\/code> \u4f18\u52bf\u660e\u663e<\/li>\n\n\n\n<li>JDK 1.6+ \u5f15\u5165\u504f\u5411\u9501\u3001\u8f7b\u91cf\u7ea7\u9501\uff0c<code>synchronized<\/code> \u6027\u80fd\u5927\u5e45\u63d0\u5347<\/li>\n\n\n\n<li>\u5728<strong>\u65e0\u9501\u7ade\u4e89\u6216\u4f4e\u7ade\u4e89<\/strong>\u73af\u5883\uff0c<code>synchronized<\/code> \u66f4\u8f7b\u91cf<\/li>\n\n\n\n<li>\u5728<strong>\u9ad8\u7ade\u4e89\u3001\u591a\u7ebf\u7a0b\u7b49\u5f85<\/strong>\u573a\u666f\uff0c<code>ReentrantLock<\/code> \u901a\u8fc7\u7075\u6d3b\u8c03\u5ea6\u53ef\u66f4\u9ad8\u6548<\/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\u529f\u80fd\u533a\u522b\u7ec6\u8282<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u6027<\/th><th><code>synchronized<\/code><\/th><th><code>ReentrantLock<\/code><\/th><\/tr><\/thead><tbody><tr><td>\u516c\u5e73\u9501<\/td><td>\u65e0<\/td><td>\u652f\u6301\uff0c\u901a\u8fc7\u6784\u9020\u51fd\u6570\u8bbe\u7f6e<\/td><\/tr><tr><td>\u53ef\u4e2d\u65ad\u9501<\/td><td>\u4e0d\u652f\u6301<\/td><td>\u652f\u6301 <code>lockInterruptibly()<\/code><\/td><\/tr><tr><td>\u5c1d\u8bd5\u83b7\u53d6\u9501<\/td><td>\u65e0<\/td><td>\u652f\u6301 <code>tryLock()<\/code><\/td><\/tr><tr><td>\u591a\u6761\u4ef6\u7b49\u5f85<\/td><td>\u4e00\u4e2a\u6761\u4ef6\uff08<code>wait\/notify<\/code>\uff09<\/td><td>\u591a\u4e2a\u6761\u4ef6\u652f\u6301 <code>Condition<\/code><\/td><\/tr><tr><td>\u9501\u91ca\u653e\u5b89\u5168<\/td><td>JVM\u81ea\u52a8\u91ca\u653e<\/td><td>\u7a0b\u5e8f\u5458\u5fc5\u987b\u624b\u52a8\u91ca\u653e<\/td><\/tr><tr><td>\u4ee3\u7801\u7b80\u6d01\u6027<\/td><td>\u7b80\u5355\uff0c\u5199\u6cd5\u5c11<\/td><td>\u4ee3\u7801\u591a\uff0c\u9700\u5199 try-finally<\/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\">\u516d\u3001\u9002\u7528\u573a\u666f\u5efa\u8bae<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u573a\u666f\u7c7b\u578b<\/th><th>\u63a8\u8350\u4f7f\u7528<\/th><\/tr><\/thead><tbody><tr><td>\u7b80\u5355\u540c\u6b65<\/td><td><code>synchronized<\/code><\/td><\/tr><tr><td>\u9700\u8981\u516c\u5e73\u9501<\/td><td><code>ReentrantLock<\/code>\uff08\u6784\u9020\u53c2\u6570true\uff09<\/td><\/tr><tr><td>\u9700\u8981\u53ef\u4e2d\u65ad\u9501<\/td><td><code>ReentrantLock<\/code><\/td><\/tr><tr><td>\u9700\u8981\u5c1d\u8bd5\u975e\u963b\u585e\u9501<\/td><td><code>ReentrantLock.tryLock()<\/code><\/td><\/tr><tr><td>\u9700\u8981\u591a\u4e2a\u6761\u4ef6\u53d8\u91cf<\/td><td><code>ReentrantLock + Condition<\/code><\/td><\/tr><tr><td>\u4ee3\u7801\u7b80\u6d01\u4f18\u5148<\/td><td><code>synchronized<\/code><\/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\">\u4e03\u3001\u603b\u7ed3\u8868\u683c<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u7279\u6027<\/th><th>synchronized<\/th><th>ReentrantLock<\/th><\/tr><\/thead><tbody><tr><td>\u51fa\u73b0\u65f6\u95f4<\/td><td>Java 1.0<\/td><td>Java 5<\/td><\/tr><tr><td>\u9501\u7c7b\u578b<\/td><td>JVM \u5185\u7f6e\u9501<\/td><td>\u663e\u5f0f\u9501<\/td><\/tr><tr><td>\u53ef\u91cd\u5165<\/td><td>\u662f<\/td><td>\u662f<\/td><\/tr><tr><td>\u53ef\u4e2d\u65ad<\/td><td>\u5426<\/td><td>\u662f<\/td><\/tr><tr><td>\u516c\u5e73\u9501<\/td><td>\u5426<\/td><td>\u652f\u6301<\/td><\/tr><tr><td>\u9501\u91ca\u653e<\/td><td>\u81ea\u52a8<\/td><td>\u624b\u52a8<\/td><\/tr><tr><td>\u6761\u4ef6\u53d8\u91cf<\/td><td>wait\/notify<\/td><td>Condition<\/td><\/tr><tr><td>\u4ee3\u7801\u7b80\u6d01<\/td><td>\u7b80\u5355<\/td><td>\u590d\u6742<\/td><\/tr><tr><td>\u6027\u80fd<\/td><td>JDK 1.6+ \u4f4e\u7ade\u4e89\u65f6\u66f4\u4f18<\/td><td>\u9ad8\u7ade\u4e89\u65f6\u66f4\u4f18<\/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\u53c2\u8003\u94fe\u63a5<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\ud83d\udd17 <a href=\"https:\/\/docs.oracle.com\/javase\/tutorial\/essential\/concurrency\/locksync.html\"><code>synchronized<\/code> \u5b98\u65b9\u6559\u7a0b\uff08Oracle\uff09<\/a><\/li>\n\n\n\n<li>\ud83d\udd17 <a href=\"https:\/\/docs.oracle.com\/javase\/8\/docs\/api\/java\/util\/concurrent\/locks\/ReentrantLock.html\"><code>ReentrantLock<\/code> \u5b98\u65b9\u6587\u6863<\/a><\/li>\n\n\n\n<li>\ud83d\udd17 <a href=\"https:\/\/jcip.net\/\">Java \u5e76\u53d1\u7f16\u7a0b\u5b9e\u6218\uff08\u4e66\u7c4d\uff09<\/a><\/li>\n<\/ul>\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>\u4e0b\u9762\u4ece\u591a\u4e2a\u7ef4\u5ea6\uff0c\u5168\u9762\u8be6\u7ec6\u5730\u8bb2\u89e3 Java \u4e2d\u7684 lock\uff08\u4ee5 ReentrantLock \u4e3a\u4ee3\u8868\uff09\u548c sync [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3872,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-3871","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-java-"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3871","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=3871"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3871\/revisions"}],"predecessor-version":[{"id":3873,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/3871\/revisions\/3873"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media\/3872"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=3871"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=3871"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=3871"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}