{"id":202547,"date":"2025-05-22T09:29:16","date_gmt":"2025-05-22T01:29:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202547\/"},"modified":"2025-05-22T09:29:16","modified_gmt":"2025-05-22T01:29:16","slug":"%e9%98%b2%e6%ad%a2-java-%e5%87%bd%e6%95%b0%e5%9c%a8%e5%a4%9a%e5%a4%84%e7%90%86%e5%99%a8%e7%b3%bb%e7%bb%9f%e4%b8%ad%e5%87%ba%e7%8e%b0%e7%ab%9e%e4%ba%89%e6%9d%a1%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202547\/","title":{"rendered":"\u9632\u6b62 Java \u51fd\u6570\u5728\u591a\u5904\u7406\u5668\u7cfb\u7edf\u4e2d\u51fa\u73b0\u7ade\u4e89\u6761\u4ef6"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u9632\u6b62 Java \u51fd\u6570\u5728\u591a\u5904\u7406\u5668\u7cfb\u7edf\u4e2d\u51fa\u73b0\u7ade\u4e89\u6761\u4ef6<\/h1>\n<p>\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u8981\u52aa\u529b\uff0c\u4f46\u662f\u4e0d\u8981\u6025\uff01\u4eca\u5929\u7684\u8fd9\u7bc7\u6587\u7ae0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300a\u9632\u6b62 Java \u51fd\u6570\u5728\u591a\u5904\u7406\u5668\u7cfb\u7edf\u4e2d\u51fa\u73b0\u7ade\u4e89\u6761\u4ef6\u300b<\/span>\u5c06\u4f1a\u4ecb\u7ecd\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u4f60\u60f3\u6df1\u5165\u5b66\u4e60<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\uff0c\u53ef\u4ee5\u5173\u6ce8\u6211\uff01\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\u7684\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u80fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n<p>\u7ade\u4e89\u6761\u4ef6\u53d1\u751f\u5728\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8bbf\u95ee\u5171\u4eab\u6570\u636e\u65f6\uff0c\u53ef\u80fd\u5bfc\u81f4\u4e0d\u53ef\u9884\u6d4b\u7684\u9519\u8bef\u3002\u9632\u6b62\u7ade\u4e89\u6761\u4ef6\u7684\u65b9\u6cd5\u6709\uff1a\u4f7f\u7528 synchronized \u65b9\u6cd5\u6216\u5757\uff1b\u4f7f\u7528\u539f\u5b50\u7c7b\uff1b\u4f7f\u7528 Java \u5185\u7f6e\u9501\uff0c\u5982 ReentrantLock \u548c ReadWriteLock\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241026\/1729916549671c6e85def2e.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u9632\u6b62 Java \u51fd\u6570\u5728\u591a\u5904\u7406\u5668\u7cfb\u7edf\u4e2d\u51fa\u73b0\u7ade\u4e89\u6761\u4ef6<\/strong><\/p>\n<p><strong>\u4ec0\u4e48\u662f\u7ade\u4e89\u6761\u4ef6\uff1f<\/strong><\/p>\n<p>\u7ade\u4e89\u6761\u4ef6\u53d1\u751f\u5728\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8bbf\u95ee\u5171\u4eab\u6570\u636e\u65f6\uff0c\u5e76\u4e14\u6b64\u8bbf\u95ee\u53ef\u80fd\u4ee5\u4e0d\u53ef\u9884\u6d4b\u7684\u65b9\u5f0f\u66f4\u6539\u6570\u636e\u3002\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e0d\u53ef\u9884\u671f\u7684\u9519\u8bef\uff0c\u4f8b\u5982\u6570\u636e\u635f\u574f\u6216\u6b7b\u9501\u3002<\/p>\n<p><strong>\u9632\u6b62\u7ade\u4e89\u6761\u4ef6\u7684\u65b9\u6cd5<\/strong><\/p>\n<p><strong>\u540c\u6b65<\/strong><\/p>\n<ul>\n<li><strong>synchronized \u65b9\u6cd5<\/strong>\uff1a\u5c06\u65b9\u6cd5\u6807\u8bb0\u4e3a synchronized \u53ef\u4ee5\u9632\u6b62\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u6267\u884c\u8be5\u65b9\u6cd5\u3002<\/li>\n<li><strong>synchronized \u5757<\/strong>\uff1a\u4f7f\u7528 synchronized \u5173\u952e\u5b57\u5305\u88f9\u9700\u8981\u4fdd\u62a4\u7684\u4ee3\u7801\u5757\u3002<\/li>\n<\/ul>\n<p><em><strong>\u793a\u4f8b\uff1a<\/strong><\/em><\/p>\n<pre>private Object lock = new Object();\n\npublic synchronized void incrementCounter() {\n    synchronized (lock) {\n        \/\/ \u4e34\u754c\u533a\u4ee3\u7801\n    }\n}<\/pre>\n<p><strong>\u539f\u5b50\u7c7b<\/strong><\/p>\n<p>\u539f\u5b50\u7c7b\u63d0\u4f9b\u539f\u5b50\u64cd\u4f5c\uff0c\u8fd9\u610f\u5473\u7740\u8fd9\u4e9b\u64cd\u4f5c\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e2d\u662f\u4e0d\u53ef\u5206\u5272\u7684\u3002<\/p>\n<p><em><strong>\u793a\u4f8b\uff1a<\/strong><\/em><\/p>\n<pre>import java.util.concurrent.atomic.AtomicInteger;\n\nAtomicInteger counter = new AtomicInteger();\n\npublic void incrementCounter() {\n    counter.incrementAndGet();\n}<\/pre>\n<p><strong>Java \u5185\u7f6e\u9501<\/strong><\/p>\n<p>Java \u63d0\u4f9b\u4e86\u5185\u7f6e\u9501\uff0c\u5982 ReentrantLock \u548c ReadWriteLock\u3002\u8fd9\u4e9b\u9501\u5141\u8bb8\u66f4\u7cbe\u7ec6\u7684\u7ebf\u7a0b\u63a7\u5236\u3002<\/p>\n<p><em><strong>\u793a\u4f8b\uff1a<\/strong><\/em><\/p>\n<pre>import java.util.concurrent.locks.ReentrantLock;\n\nReentrantLock lock = new ReentrantLock();\n\npublic void incrementCounter() {\n    lock.lock();\n    try {\n        \/\/ \u4e34\u754c\u533a\u4ee3\u7801\n    } finally {\n        lock.unlock();\n    }\n}<\/pre>\n<p><strong>\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n<p>\u8003\u8651\u4e00\u4e2a\u4f7f\u7528\u65b9\u6cd5 incrementCounter() \u6765\u589e\u52a0\u8ba1\u6570\u5668\u7684\u7c7b\u3002\u5982\u679c\u6ca1\u6709\u91c7\u53d6\u9884\u9632\u63aa\u65bd\uff0c\u5219\u591a\u4e2a\u7ebf\u7a0b\u53ef\u80fd\u4f1a\u540c\u65f6\u8c03\u7528\u8be5\u65b9\u6cd5\u5e76\u5c1d\u8bd5\u4fee\u6539\u5171\u4eab\u8ba1\u6570\u5668\u3002\u8fd9\u53ef\u80fd\u5bfc\u81f4\u4e22\u5931\u66f4\u65b0\u6216\u6570\u636e\u635f\u574f\u3002<\/p>\n<p>\u901a\u8fc7\u4f7f\u7528\u540c\u6b65\u5757\u6765\u4fdd\u62a4\u4e34\u754c\u533a\uff0c\u6211\u4eec\u53ef\u4ee5\u9632\u6b62\u7ade\u4e89\u6761\u4ef6\u53d1\u751f\u3002\u8fd9\u6837\uff0c\u53ea\u6709\u5f53\u4e00\u4e2a\u7ebf\u7a0b\u5b8c\u6210\u4e86\u5b83\u7684\u64cd\u4f5c\u540e\uff0c\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u624d\u80fd\u5f00\u59cb\u6267\u884c\u8be5\u64cd\u4f5c\u3002<\/p>\n<p><em><strong>\u793a\u4f8b\u4ee3\u7801\uff1a<\/strong><\/em><\/p>\n<pre>private Object lock = new Object();\n\nprivate int counter;\n\npublic void incrementCounter() {\n    synchronized (lock) {\n        counter++;\n    }\n}\n\npublic static void main(String[] args) {\n    Counter counter = new Counter();\n    \n    \/\/ \u521b\u5efa\u591a\u4e2a\u7ebf\u7a0b\u6765\u8c03\u7528 incrementCounter() \u65b9\u6cd5\n    for (int i = 0; i &lt; 100; i++) {\n        new Thread(() -&gt; {\n            for (int j = 0; j &lt; 10000; j++) {\n                counter.incrementCounter();\n            }\n        }).start();\n    }\n    \n    \/\/ \u7b49\u5f85\u6240\u6709\u7ebf\u7a0b\u5b8c\u6210\n    for (int i = 0; i &lt; 100; i++) {\n        try {\n            Thread.sleep(100);\n        } catch (InterruptedException e) {\n            e.printStackTrace();\n        }\n    }\n    \n    System.out.println(\"Final counter value: \" + counter.getCounter());\n}<\/pre>\n<p>\u4eca\u5929\u5173\u4e8e\u300a\u9632\u6b62 Java \u51fd\u6570\u5728\u591a\u5904\u7406\u5668\u7cfb\u7edf\u4e2d\u51fa\u73b0\u7ade\u4e89\u6761\u4ef6\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9632\u6b62 Java \u51fd\u6570\u5728\u591a\u5904\u7406\u5668\u7cfb&#46;&#46;&#46;<\/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-202547","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202547","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=202547"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202547\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202547"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202547"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202547"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}