{"id":10008060,"date":"2023-07-10T10:00:24","date_gmt":"2023-07-10T02:00:24","guid":{"rendered":"https:\/\/ityet.com\/?p=10008060"},"modified":"2023-07-10T10:00:24","modified_gmt":"2023-07-10T02:00:24","slug":"%e5%86%8d%e8%a7%81%ef%bc%8cguava%ef%bc%81%e5%86%8d%e8%a7%81%ef%bc%8cehcache%ef%bc%81","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10008060","title":{"rendered":"\u518d\u89c1\uff0cGuava\uff01\u518d\u89c1\uff0cEhcache\uff01"},"content":{"rendered":"<h2>\u4e00\u3001Caffeine\u4ecb\u7ecd<\/h2>\n<h4>1\u3001\u7f13\u5b58\u4ecb\u7ecd<\/h4>\n<p>\u7f13\u5b58(Cache)\u5728\u4ee3\u7801\u4e16\u754c\u4e2d\u65e0\u5904\u4e0d\u5728\u3002\u4ece\u5e95\u5c42\u7684CPU\u591a\u7ea7\u7f13\u5b58\uff0c\u5230\u5ba2\u6237\u7aef\u7684\u9875\u9762\u7f13\u5b58\uff0c\u5904\u5904\u90fd\u5b58\u5728\u7740\u7f13\u5b58\u7684\u8eab\u5f71\u3002\u7f13\u5b58\u4ece\u672c\u8d28\u4e0a\u6765\u8bf4\uff0c\u662f\u4e00\u79cd\u7a7a\u95f4\u6362\u65f6\u95f4\u7684\u624b\u6bb5\uff0c\u901a\u8fc7\u5bf9\u6570\u636e\u8fdb\u884c\u4e00\u5b9a\u7684\u7a7a\u95f4\u5b89\u6392\uff0c\u4f7f\u5f97\u4e0b\u6b21\u8fdb\u884c\u6570\u636e\u8bbf\u95ee\u65f6\u8d77\u5230\u52a0\u901f\u7684\u6548\u679c\u3002<\/p>\n<p>\u5c31Java\u800c\u8a00\uff0c\u5176\u5e38\u7528\u7684\u7f13\u5b58\u89e3\u51b3\u65b9\u6848\u6709\u5f88\u591a\uff0c\u4f8b\u5982\u6570\u636e\u5e93\u7f13\u5b58\u6846\u67b6EhCache\uff0c\u5206\u5e03\u5f0f\u7f13\u5b58Memcached\u7b49\uff0c\u8fd9\u4e9b\u7f13\u5b58\u65b9\u6848\u5b9e\u9645\u4e0a\u90fd\u662f\u4e3a\u4e86\u63d0\u5347\u541e\u5410\u6548\u7387\uff0c\u907f\u514d\u6301\u4e45\u5c42\u538b\u529b\u8fc7\u5927\u3002<\/p>\n<p>\u5bf9\u4e8e\u5e38\u89c1\u7f13\u5b58\u7c7b\u578b\u800c\u8a00\uff0c\u53ef\u4ee5\u5206\u4e3a\u672c\u5730\u7f13\u5b58\u4ee5\u53ca\u5206\u5e03\u5f0f\u7f13\u5b58\u4e24\u79cd\uff0cCaffeine\u5c31\u662f\u4e00\u79cd\u4f18\u79c0\u7684\u672c\u5730\u7f13\u5b58\uff0c\u800cRedis\u53ef\u4ee5\u7528\u6765\u505a\u5206\u5e03\u5f0f\u7f13\u5b58<\/p>\n<h4>2\u3001Caffeine\u4ecb\u7ecd<\/h4>\n<p>Caffeine\u5b98\u65b9\uff1a<\/p>\n<blockquote><p><a href=\"https:\/\/link.segmentfault.com\/?enc=P3THbpgWIWOBgujtgRNKfg%3D%3D.8Ee2FbApoEPXlDTu1U2y9y6%2BrYhKDEafVbbDwj8TG58m8DwA4OHy%2B0pBpL7%2B9Td%2B\" rel=\"nofollow\">https:\/\/github.com\/ben-manes\/caffeine<\/a><\/p><\/blockquote>\n<p>Caffeine\u662f\u57fa\u4e8eJava 1.8\u7684\u9ad8\u6027\u80fd\u672c\u5730\u7f13\u5b58\u5e93\uff0c\u7531Guava\u6539\u8fdb\u800c\u6765\uff0c\u800c\u4e14\u5728Spring5\u5f00\u59cb\u7684\u9ed8\u8ba4\u7f13\u5b58\u5b9e\u73b0\u5c31\u5c06Caffeine\u4ee3\u66ff\u539f\u6765\u7684Google Guava\uff0c\u5b98\u65b9\u8bf4\u660e\u6307\u51fa\uff0c\u5176\u7f13\u5b58\u547d\u4e2d\u7387\u5df2\u7ecf\u63a5\u8fd1\u6700\u4f18\u503c\u3002\u5b9e\u9645\u4e0aCaffeine\u8fd9\u6837\u7684\u672c\u5730\u7f13\u5b58\u548cConcurrentMap\u5f88\u50cf\uff0c\u5373\u652f\u6301\u5e76\u53d1\uff0c\u5e76\u4e14\u652f\u6301O(1)\u65f6\u95f4\u590d\u6742\u5ea6\u7684\u6570\u636e\u5b58\u53d6\u3002\u4e8c\u8005\u7684\u4e3b\u8981\u533a\u522b\u5728\u4e8e\uff1a<\/p>\n<ul>\n<li>ConcurrentMap\u5c06\u5b58\u50a8\u6240\u6709\u5b58\u5165\u7684\u6570\u636e\uff0c\u76f4\u5230\u4f60\u663e\u5f0f\u5c06\u5176\u79fb\u9664\uff1b<\/li>\n<li>Caffeine\u5c06\u901a\u8fc7\u7ed9\u5b9a\u7684\u914d\u7f6e\uff0c\u81ea\u52a8\u79fb\u9664\u201c\u4e0d\u5e38\u7528\u201d\u7684\u6570\u636e\uff0c\u4ee5\u4fdd\u6301\u5185\u5b58\u7684\u5408\u7406\u5360\u7528\u3002<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c\u4e00\u79cd\u66f4\u597d\u7684\u7406\u89e3\u65b9\u5f0f\u662f\uff1aCache\u662f\u4e00\u79cd\u5e26\u6709\u5b58\u50a8\u548c\u79fb\u9664\u7b56\u7565\u7684Map\u3002<\/p>\n<p><img decoding=\"async\" referrerpolicy=\"no-referrer\" src=\"https:\/\/segmentfault.com\/img\/bVc8JWl\" alt=\"\" title=\"\" loading=\"lazy\"><\/p>\n<h2>\u4e8c\u3001Caffeine\u57fa\u7840<\/h2>\n<p>\u4f7f\u7528Caffeine\uff0c\u9700\u8981\u5728\u5de5\u7a0b\u4e2d\u5f15\u5165\u5982\u4e0b\u4f9d\u8d56<\/p>\n<pre><code>&lt;dependency&gt;\n    &lt;groupId&gt;com.github.ben-manes.caffeine&lt;\/groupId&gt;\n    &lt;artifactId&gt;caffeine&lt;\/artifactId&gt;\n    &lt;!--https:\/\/mvnrepository.com\/artifact\/com.github.ben-manes.caffeine\/caffeinez\u627e\u6700\u65b0\u7248--&gt;\n    &lt;version&gt;3.0.5&lt;\/version&gt;\n&lt;\/dependency&gt;<\/code><\/pre>\n<p>\u63a8\u8350\u4e00\u4e2a\u5f00\u6e90\u514d\u8d39\u7684 Spring Boot \u5b9e\u6218\u9879\u76ee\uff1a<\/p>\n<blockquote><p><a href=\"https:\/\/link.segmentfault.com\/?enc=BilNB23wTC1GjjsuzYnkyA%3D%3D.ZRwFj2UFbemyw1e%2B5KFoBC%2F42w3fo0DxNIW1nT3Nd2rTOOKuYrc6R7%2FNYMPmEFhFPW9Ek70Djwu4a9B2XF2QxQ%3D%3D\" rel=\"nofollow\">https:\/\/github.com\/javastacks\/spring-boot-best-practice<\/a><\/p><\/blockquote>\n<h4>1\u3001\u7f13\u5b58\u52a0\u8f7d\u7b56\u7565<\/h4>\n<h6>1.1 Cache\u624b\u52a8\u521b\u5efa<\/h6>\n<p>\u6700\u666e\u901a\u7684\u4e00\u79cd\u7f13\u5b58\uff0c\u65e0\u9700\u6307\u5b9a\u52a0\u8f7d\u65b9\u5f0f\uff0c\u9700\u8981\u624b\u52a8\u8c03\u7528<code>put()<\/code>\u8fdb\u884c\u52a0\u8f7d\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f<code>put()<\/code>\u65b9\u6cd5\u5bf9\u4e8e\u5df2\u5b58\u5728\u7684key\u5c06\u8fdb\u884c\u8986\u76d6\uff0c\u8fd9\u70b9\u548cMap\u7684\u8868\u73b0\u662f\u4e00\u81f4\u7684\u3002\u5728\u83b7\u53d6\u7f13\u5b58\u503c\u65f6\uff0c\u5982\u679c\u60f3\u8981\u5728\u7f13\u5b58\u503c\u4e0d\u5b58\u5728\u65f6\uff0c\u539f\u5b50\u5730\u5c06\u503c\u5199\u5165\u7f13\u5b58\uff0c\u5219\u53ef\u4ee5\u8c03\u7528<code>get(key, k -&gt; value)<\/code>\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u5c06\u907f\u514d\u5199\u5165\u7ade\u4e89\u3002\u8c03\u7528<code>invalidate()<\/code>\u65b9\u6cd5\uff0c\u5c06\u624b\u52a8\u79fb\u9664\u7f13\u5b58\u3002<\/p>\n<p>\u5728\u591a\u7ebf\u7a0b\u60c5\u51b5\u4e0b\uff0c\u5f53\u4f7f\u7528<code>get(key, k -&gt; value)<\/code>\u65f6\uff0c\u5982\u679c\u6709\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8c03\u7528\u672c\u65b9\u6cd5\u8fdb\u884c\u7ade\u4e89\uff0c\u5219\u540e\u4e00\u7ebf\u7a0b\u4f1a\u88ab\u963b\u585e\uff0c\u76f4\u5230\u524d\u4e00\u7ebf\u7a0b\u66f4\u65b0\u7f13\u5b58\u5b8c\u6210\uff1b\u800c\u82e5\u53e6\u4e00\u7ebf\u7a0b\u8c03\u7528<code>getIfPresent()<\/code>\u65b9\u6cd5\uff0c\u5219\u4f1a\u7acb\u5373\u8fd4\u56denull\uff0c\u4e0d\u4f1a\u88ab\u963b\u585e\u3002<\/p>\n<pre><code>Cache&lt;Object, Object&gt; cache = Caffeine.newBuilder()\n          \/\/\u521d\u59cb\u6570\u91cf\n          .initialCapacity(10)\n          \/\/\u6700\u5927\u6761\u6570\n          .maximumSize(10)\n          \/\/expireAfterWrite\u548cexpireAfterAccess\u540c\u65f6\u5b58\u5728\u65f6\uff0c\u4ee5expireAfterWrite\u4e3a\u51c6\n          \/\/\u6700\u540e\u4e00\u6b21\u5199\u64cd\u4f5c\u540e\u7ecf\u8fc7\u6307\u5b9a\u65f6\u95f4\u8fc7\u671f\n          .expireAfterWrite(1, TimeUnit.SECONDS)\n          \/\/\u6700\u540e\u4e00\u6b21\u8bfb\u6216\u5199\u64cd\u4f5c\u540e\u7ecf\u8fc7\u6307\u5b9a\u65f6\u95f4\u8fc7\u671f\n          .expireAfterAccess(1, TimeUnit.SECONDS)\n          \/\/\u76d1\u542c\u7f13\u5b58\u88ab\u79fb\u9664\n          .removalListener((key, val, removalCause) -&gt; { })\n          \/\/\u8bb0\u5f55\u547d\u4e2d\n          .recordStats()\n          .build();\n\n  cache.put(&quot;1&quot;,&quot;\u5f20\u4e09&quot;);\n  \/\/\u5f20\u4e09\n  System.out.println(cache.getIfPresent(&quot;1&quot;));\n  \/\/\u5b58\u50a8\u7684\u662f\u9ed8\u8ba4\u503c\n  System.out.println(cache.get(&quot;2&quot;,o -&gt; &quot;\u9ed8\u8ba4\u503c&quot;));<\/code><\/pre>\n<h6>1.2 Loading Cache\u81ea\u52a8\u521b\u5efa<\/h6>\n<p>LoadingCache\u662f\u4e00\u79cd\u81ea\u52a8\u52a0\u8f7d\u7684\u7f13\u5b58\u3002\u5176\u548c\u666e\u901a\u7f13\u5b58\u4e0d\u540c\u7684\u5730\u65b9\u5728\u4e8e\uff0c\u5f53\u7f13\u5b58\u4e0d\u5b58\u5728\/\u7f13\u5b58\u5df2\u8fc7\u671f\u65f6\uff0c\u82e5\u8c03\u7528<code>get()<\/code>\u65b9\u6cd5\uff0c\u5219\u4f1a\u81ea\u52a8\u8c03\u7528<code>CacheLoader.load()<\/code>\u65b9\u6cd5\u52a0\u8f7d\u6700\u65b0\u503c\u3002\u8c03\u7528<code>getAll()<\/code>\u65b9\u6cd5\u5c06\u904d\u5386\u6240\u6709\u7684key\u8c03\u7528get()\uff0c\u9664\u975e\u5b9e\u73b0\u4e86<code>CacheLoader.loadAll()<\/code>\u65b9\u6cd5\u3002\u4f7f\u7528LoadingCache\u65f6\uff0c\u9700\u8981\u6307\u5b9aCacheLoader\uff0c\u5e76\u5b9e\u73b0\u5176\u4e2d\u7684<code>load()<\/code>\u65b9\u6cd5\u4f9b\u7f13\u5b58\u7f3a\u5931\u65f6\u81ea\u52a8\u52a0\u8f7d\u3002<\/p>\n<p>\u5728\u591a\u7ebf\u7a0b\u60c5\u51b5\u4e0b\uff0c\u5f53\u4e24\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8c03\u7528<code>get()<\/code>\uff0c\u5219\u540e\u4e00\u7ebf\u7a0b\u5c06\u88ab\u963b\u585e\uff0c\u76f4\u81f3\u524d\u4e00\u7ebf\u7a0b\u66f4\u65b0\u7f13\u5b58\u5b8c\u6210\u3002<\/p>\n<pre><code>LoadingCache&lt;String, String&gt; loadingCache = Caffeine.newBuilder()\n        \/\/\u521b\u5efa\u7f13\u5b58\u6216\u8005\u6700\u8fd1\u4e00\u6b21\u66f4\u65b0\u7f13\u5b58\u540e\u7ecf\u8fc7\u6307\u5b9a\u65f6\u95f4\u95f4\u9694\uff0c\u5237\u65b0\u7f13\u5b58\uff1brefreshAfterWrite\u4ec5\u652f\u6301LoadingCache\n        .refreshAfterWrite(10, TimeUnit.SECONDS)\n        .expireAfterWrite(10, TimeUnit.SECONDS)\n        .expireAfterAccess(10, TimeUnit.SECONDS)\n        .maximumSize(10)\n        \/\/\u6839\u636ekey\u67e5\u8be2\u6570\u636e\u5e93\u91cc\u9762\u7684\u503c\uff0c\u8fd9\u91cc\u662f\u4e2alamba\u8868\u8fbe\u5f0f\n        .build(key -&gt; new Date().toString());<\/code><\/pre>\n<h6>1.3 Async Cache\u5f02\u6b65\u83b7\u53d6<\/h6>\n<p>AsyncCache\u662fCache\u7684\u4e00\u4e2a\u53d8\u4f53\uff0c\u5176\u54cd\u5e94\u7ed3\u679c\u5747\u4e3a<code>CompletableFuture<\/code>\uff0c\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0cAsyncCache\u5bf9\u5f02\u6b65\u7f16\u7a0b\u6a21\u5f0f\u8fdb\u884c\u4e86\u9002\u914d\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u7f13\u5b58\u8ba1\u7b97\u4f7f\u7528<code>ForkJoinPool.commonPool()<\/code>\u4f5c\u4e3a\u7ebf\u7a0b\u6c60\uff0c\u5982\u679c\u60f3\u8981\u6307\u5b9a\u7ebf\u7a0b\u6c60\uff0c\u5219\u53ef\u4ee5\u8986\u76d6\u5e76\u5b9e\u73b0<code>Caffeine.executor(Executor)<\/code>\u65b9\u6cd5\u3002<code>synchronous()<\/code>\u63d0\u4f9b\u4e86\u963b\u585e\u76f4\u5230\u5f02\u6b65\u7f13\u5b58\u751f\u6210\u5b8c\u6bd5\u7684\u80fd\u529b\uff0c\u5b83\u5c06\u4ee5Cache\u8fdb\u884c\u8fd4\u56de\u3002<\/p>\n<p>\u5728\u591a\u7ebf\u7a0b\u60c5\u51b5\u4e0b\uff0c\u5f53\u4e24\u4e2a\u7ebf\u7a0b\u540c\u65f6\u8c03\u7528<code>get(key, k -&gt; value)<\/code>\uff0c\u5219\u4f1a\u8fd4\u56de\u540c\u4e00\u4e2a<code>CompletableFuture<\/code>\u5bf9\u8c61\u3002\u7531\u4e8e\u8fd4\u56de\u7ed3\u679c\u672c\u8eab\u4e0d\u8fdb\u884c\u963b\u585e\uff0c\u53ef\u4ee5\u6839\u636e\u4e1a\u52a1\u8bbe\u8ba1\u81ea\u884c\u9009\u62e9\u963b\u585e\u7b49\u5f85\u6216\u8005\u975e\u963b\u585e\u3002<\/p>\n<pre><code>AsyncLoadingCache&lt;String, String&gt; asyncLoadingCache = Caffeine.newBuilder()\n        \/\/\u521b\u5efa\u7f13\u5b58\u6216\u8005\u6700\u8fd1\u4e00\u6b21\u66f4\u65b0\u7f13\u5b58\u540e\u7ecf\u8fc7\u6307\u5b9a\u65f6\u95f4\u95f4\u9694\u5237\u65b0\u7f13\u5b58\uff1b\u4ec5\u652f\u6301LoadingCache\n        .refreshAfterWrite(1, TimeUnit.SECONDS)\n        .expireAfterWrite(1, TimeUnit.SECONDS)\n        .expireAfterAccess(1, TimeUnit.SECONDS)\n        .maximumSize(10)\n        \/\/\u6839\u636ekey\u67e5\u8be2\u6570\u636e\u5e93\u91cc\u9762\u7684\u503c\n        .buildAsync(key -&gt; {\n            Thread.sleep(1000);\n            return new Date().toString();\n        });\n\n\/\/\u5f02\u6b65\u7f13\u5b58\u8fd4\u56de\u7684\u662fCompletableFuture\nCompletableFuture&lt;String&gt; future = asyncLoadingCache.get(&quot;1&quot;);\nfuture.thenAccept(System.out::println);<\/code><\/pre>\n<h4>2\u3001\u9a71\u9010\u7b56\u7565<\/h4>\n<p>\u9a71\u9010\u7b56\u7565\u5728\u521b\u5efa\u7f13\u5b58\u7684\u65f6\u5019\u8fdb\u884c\u6307\u5b9a\u3002\u5e38\u7528\u7684\u6709\u57fa\u4e8e\u5bb9\u91cf\u7684\u9a71\u9010\u548c\u57fa\u4e8e\u65f6\u95f4\u7684\u9a71\u9010\u3002<\/p>\n<p>\u57fa\u4e8e\u5bb9\u91cf\u7684\u9a71\u9010\u9700\u8981\u6307\u5b9a\u7f13\u5b58\u5bb9\u91cf\u7684\u6700\u5927\u503c\uff0c\u5f53\u7f13\u5b58\u5bb9\u91cf\u8fbe\u5230\u6700\u5927\u65f6\uff0cCaffeine\u5c06\u4f7f\u7528LRU\u7b56\u7565\u5bf9\u7f13\u5b58\u8fdb\u884c\u6dd8\u6c70\uff1b\u57fa\u4e8e\u65f6\u95f4\u7684\u9a71\u9010\u7b56\u7565\u5982\u5b57\u9762\u610f\u601d\uff0c\u53ef\u4ee5\u8bbe\u7f6e\u5728\u6700\u540e\u8bbf\u95ee\/\u5199\u5165\u4e00\u4e2a\u7f13\u5b58\u7ecf\u8fc7\u6307\u5b9a\u65f6\u95f4\u540e\uff0c\u81ea\u52a8\u8fdb\u884c\u6dd8\u6c70\u3002<\/p>\n<p>\u9a71\u9010\u7b56\u7565\u53ef\u4ee5\u7ec4\u5408\u4f7f\u7528\uff0c\u4efb\u610f\u9a71\u9010\u7b56\u7565\u751f\u6548\u540e\uff0c\u8be5\u7f13\u5b58\u6761\u76ee\u5373\u88ab\u9a71\u9010\u3002<\/p>\n<ul>\n<li>LRU \u6700\u8fd1\u6700\u5c11\u4f7f\u7528\uff0c\u6dd8\u6c70\u6700\u957f\u65f6\u95f4\u6ca1\u6709\u88ab\u4f7f\u7528\u7684\u9875\u9762\u3002<\/li>\n<li>LFU \u6700\u4e0d\u7ecf\u5e38\u4f7f\u7528\uff0c\u6dd8\u6c70\u4e00\u6bb5\u65f6\u95f4\u5185\u4f7f\u7528\u6b21\u6570\u6700\u5c11\u7684\u9875\u9762<\/li>\n<li>FIFO \u5148\u8fdb\u5148\u51fa<\/li>\n<\/ul>\n<p>Caffeine\u67094\u79cd\u7f13\u5b58\u6dd8\u6c70\u8bbe\u7f6e<\/p>\n<ul>\n<li>\u5927\u5c0f \uff08LFU\u7b97\u6cd5\u8fdb\u884c\u6dd8\u6c70\uff09<\/li>\n<li>\u6743\u91cd \uff08\u5927\u5c0f\u4e0e\u6743\u91cd \u53ea\u80fd\u4e8c\u9009\u4e00\uff09<\/li>\n<li>\u65f6\u95f4<\/li>\n<li>\u5f15\u7528 \uff08\u4e0d\u5e38\u7528\uff0c\u672c\u6587\u4e0d\u4ecb\u7ecd\uff09<\/li>\n<\/ul>\n<pre><code>@Slf4j\npublic class CacheTest {\n    \/**\n     * \u7f13\u5b58\u5927\u5c0f\u6dd8\u6c70\n     *\/\n    @Test\n    public void maximumSizeTest() throws InterruptedException {\n        Cache&lt;Integer, Integer&gt; cache = Caffeine.newBuilder()\n                \/\/\u8d85\u8fc710\u4e2a\u540e\u4f1a\u4f7f\u7528W-TinyLFU\u7b97\u6cd5\u8fdb\u884c\u6dd8\u6c70\n                .maximumSize(10)\n                .evictionListener((key, val, removalCause) -&gt; {\n                    log.info(&quot;\u6dd8\u6c70\u7f13\u5b58\uff1akey:{} val:{}&quot;, key, val);\n                })\n                .build();\n\n        for (int i = 1; i &lt; 20; i++) {\n            cache.put(i, i);\n        }\n        Thread.sleep(500);\/\/\u7f13\u5b58\u6dd8\u6c70\u662f\u5f02\u6b65\u7684\n\n        \/\/ \u6253\u5370\u8fd8\u6ca1\u88ab\u6dd8\u6c70\u7684\u7f13\u5b58\n        System.out.println(cache.asMap());\n    }\n\n    \/**\n     * \u6743\u91cd\u6dd8\u6c70\n     *\/\n    @Test\n    public void maximumWeightTest() throws InterruptedException {\n        Cache&lt;Integer, Integer&gt; cache = Caffeine.newBuilder()\n                \/\/\u9650\u5236\u603b\u6743\u91cd\uff0c\u82e5\u6240\u6709\u7f13\u5b58\u7684\u6743\u91cd\u52a0\u8d77\u6765&gt;\u603b\u6743\u91cd\u5c31\u4f1a\u6dd8\u6c70\u6743\u91cd\u5c0f\u7684\u7f13\u5b58\n                .maximumWeight(100)\n                .weigher((Weigher&lt;Integer, Integer&gt;) (key, value) -&gt; key)\n                .evictionListener((key, val, removalCause) -&gt; {\n                    log.info(&quot;\u6dd8\u6c70\u7f13\u5b58\uff1akey:{} val:{}&quot;, key, val);\n                })\n                .build();\n\n        \/\/\u603b\u6743\u91cd\u5176\u5b9e\u662f=\u6240\u6709\u7f13\u5b58\u7684\u6743\u91cd\u52a0\u8d77\u6765\n        int maximumWeight = 0;\n        for (int i = 1; i &lt; 20; i++) {\n            cache.put(i, i);\n            maximumWeight += i;\n        }\n        System.out.println(&quot;\u603b\u6743\u91cd=&quot; + maximumWeight);\n        Thread.sleep(500);\/\/\u7f13\u5b58\u6dd8\u6c70\u662f\u5f02\u6b65\u7684\n\n        \/\/ \u6253\u5370\u8fd8\u6ca1\u88ab\u6dd8\u6c70\u7684\u7f13\u5b58\n        System.out.println(cache.asMap());\n    }\n\n\n    \/**\n     * \u8bbf\u95ee\u540e\u5230\u671f\uff08\u6bcf\u6b21\u8bbf\u95ee\u90fd\u4f1a\u91cd\u7f6e\u65f6\u95f4\uff0c\u4e5f\u5c31\u662f\u8bf4\u5982\u679c\u4e00\u76f4\u88ab\u8bbf\u95ee\u5c31\u4e0d\u4f1a\u88ab\u6dd8\u6c70\uff09\n     *\/\n    @Test\n    public void expireAfterAccessTest() throws InterruptedException {\n        Cache&lt;Integer, Integer&gt; cache = Caffeine.newBuilder()\n                .expireAfterAccess(1, TimeUnit.SECONDS)\n                \/\/\u53ef\u4ee5\u6307\u5b9a\u8c03\u5ea6\u7a0b\u5e8f\u6765\u53ca\u65f6\u5220\u9664\u8fc7\u671f\u7f13\u5b58\u9879\uff0c\u800c\u4e0d\u662f\u7b49\u5f85Caffeine\u89e6\u53d1\u5b9a\u671f\u7ef4\u62a4\n                \/\/\u82e5\u4e0d\u8bbe\u7f6escheduler\uff0c\u5219\u7f13\u5b58\u4f1a\u5728\u4e0b\u4e00\u6b21\u8c03\u7528get\u7684\u65f6\u5019\u624d\u4f1a\u88ab\u52a8\u5220\u9664\n                .scheduler(Scheduler.systemScheduler())\n                .evictionListener((key, val, removalCause) -&gt; {\n                    log.info(&quot;\u6dd8\u6c70\u7f13\u5b58\uff1akey:{} val:{}&quot;, key, val);\n\n                })\n                .build();\n        cache.put(1, 2);\n        System.out.println(cache.getIfPresent(1));\n        Thread.sleep(3000);\n        System.out.println(cache.getIfPresent(1));\/\/null\n    }\n\n    \/**\n     * \u5199\u5165\u540e\u5230\u671f\n     *\/\n    @Test\n    public void expireAfterWriteTest() throws InterruptedException {\n        Cache&lt;Integer, Integer&gt; cache = Caffeine.newBuilder()\n                .expireAfterWrite(1, TimeUnit.SECONDS)\n                \/\/\u53ef\u4ee5\u6307\u5b9a\u8c03\u5ea6\u7a0b\u5e8f\u6765\u53ca\u65f6\u5220\u9664\u8fc7\u671f\u7f13\u5b58\u9879\uff0c\u800c\u4e0d\u662f\u7b49\u5f85Caffeine\u89e6\u53d1\u5b9a\u671f\u7ef4\u62a4\n                \/\/\u82e5\u4e0d\u8bbe\u7f6escheduler\uff0c\u5219\u7f13\u5b58\u4f1a\u5728\u4e0b\u4e00\u6b21\u8c03\u7528get\u7684\u65f6\u5019\u624d\u4f1a\u88ab\u52a8\u5220\u9664\n                .scheduler(Scheduler.systemScheduler())\n                .evictionListener((key, val, removalCause) -&gt; {\n                    log.info(&quot;\u6dd8\u6c70\u7f13\u5b58\uff1akey:{} val:{}&quot;, key, val);\n                })\n                .build();\n        cache.put(1, 2);\n        Thread.sleep(3000);\n        System.out.println(cache.getIfPresent(1));\/\/null\n    }\n}<\/code><\/pre>\n<h4>3\u3001\u5237\u65b0\u673a\u5236<\/h4>\n<p><code>refreshAfterWrite()<\/code>\u8868\u793ax\u79d2\u540e\u81ea\u52a8\u5237\u65b0\u7f13\u5b58\u7684\u7b56\u7565\u53ef\u4ee5\u914d\u5408\u6dd8\u6c70\u7b56\u7565\u4f7f\u7528\uff0c\u6ce8\u610f\u7684\u662f\u5237\u65b0\u673a\u5236\u53ea\u652f\u6301LoadingCache\u548cAsyncLoadingCache<\/p>\n<pre><code>private static int NUM = 0;\n\n@Test\npublic void refreshAfterWriteTest() throws InterruptedException {\n    LoadingCache&lt;Integer, Integer&gt; cache = Caffeine.newBuilder()\n            .refreshAfterWrite(1, TimeUnit.SECONDS)\n            \/\/\u6a21\u62df\u83b7\u53d6\u6570\u636e\uff0c\u6bcf\u6b21\u83b7\u53d6\u5c31\u81ea\u589e1\n            .build(integer -&gt; ++NUM);\n\n    \/\/\u83b7\u53d6ID=1\u7684\u503c\uff0c\u7531\u4e8e\u7f13\u5b58\u91cc\u8fd8\u6ca1\u6709\uff0c\u6240\u4ee5\u4f1a\u81ea\u52a8\u653e\u5165\u7f13\u5b58\n    System.out.println(cache.get(1));\/\/ 1\n\n    \/\/ \u5ef6\u8fdf2\u79d2\u540e\uff0c\u7406\u8bba\u4e0a\u81ea\u52a8\u5237\u65b0\u7f13\u5b58\u540e\u53d6\u5230\u7684\u503c\u662f2\n    \/\/ \u4f46\u5176\u5b9e\u4e0d\u662f\uff0c\u503c\u8fd8\u662f1\uff0c\u56e0\u4e3arefreshAfterWrite\u5e76\u4e0d\u662f\u8bbe\u7f6e\u4e86n\u79d2\u540e\u91cd\u65b0\u83b7\u53d6\u5c31\u4f1a\u81ea\u52a8\u5237\u65b0\n    \/\/ \u800c\u662fx\u79d2\u540e&amp;&amp;\u7b2c\u4e8c\u6b21\u8c03\u7528getIfPresent\u7684\u65f6\u5019\u624d\u4f1a\u88ab\u52a8\u5237\u65b0\n    Thread.sleep(2000);\n    System.out.println(cache.getIfPresent(1));\/\/ 1\n\n    \/\/\u6b64\u65f6\u624d\u4f1a\u5237\u65b0\u7f13\u5b58\uff0c\u800c\u7b2c\u4e00\u6b21\u62ff\u5230\u7684\u8fd8\u662f\u65e7\u503c\n    System.out.println(cache.getIfPresent(1));\/\/ 2\n}<\/code><\/pre>\n<h4>4\u3001\u7edf\u8ba1<\/h4>\n<pre><code>LoadingCache&lt;String, String&gt; cache = Caffeine.newBuilder()\n        \/\/\u521b\u5efa\u7f13\u5b58\u6216\u8005\u6700\u8fd1\u4e00\u6b21\u66f4\u65b0\u7f13\u5b58\u540e\u7ecf\u8fc7\u6307\u5b9a\u65f6\u95f4\u95f4\u9694\uff0c\u5237\u65b0\u7f13\u5b58\uff1brefreshAfterWrite\u4ec5\u652f\u6301LoadingCache\n        .refreshAfterWrite(1, TimeUnit.SECONDS)\n        .expireAfterWrite(1, TimeUnit.SECONDS)\n        .expireAfterAccess(1, TimeUnit.SECONDS)\n        .maximumSize(10)\n        \/\/\u5f00\u542f\u8bb0\u5f55\u7f13\u5b58\u547d\u4e2d\u7387\u7b49\u4fe1\u606f\n        .recordStats()\n        \/\/\u6839\u636ekey\u67e5\u8be2\u6570\u636e\u5e93\u91cc\u9762\u7684\u503c\n        .build(key -&gt; {\n            Thread.sleep(1000);\n            return new Date().toString();\n        });\n\n\ncache.put(&quot;1&quot;, &quot;shawn&quot;);\ncache.get(&quot;1&quot;);\n\n\/*\n * hitCount :\u547d\u4e2d\u7684\u6b21\u6570\n * missCount:\u672a\u547d\u4e2d\u6b21\u6570\n * requestCount:\u8bf7\u6c42\u6b21\u6570\n * hitRate:\u547d\u4e2d\u7387\n * missRate:\u4e22\u5931\u7387\n * loadSuccessCount:\u6210\u529f\u52a0\u8f7d\u65b0\u503c\u7684\u6b21\u6570\n * loadExceptionCount:\u5931\u8d25\u52a0\u8f7d\u65b0\u503c\u7684\u6b21\u6570\n * totalLoadCount:\u603b\u6761\u6570\n * loadExceptionRate:\u5931\u8d25\u52a0\u8f7d\u65b0\u503c\u7684\u6bd4\u7387\n * totalLoadTime:\u5168\u90e8\u52a0\u8f7d\u65f6\u95f4\n * evictionCount:\u4e22\u5931\u7684\u6761\u6570\n *\/\nSystem.out.println(cache.stats());<\/code><\/pre>\n<h4>5\u3001\u603b\u7ed3<\/h4>\n<p>\u4e0a\u8ff0\u4e00\u4e9b\u7b56\u7565\u5728\u521b\u5efa\u65f6\u90fd\u53ef\u4ee5\u8fdb\u884c\u81ea\u7531\u7ec4\u5408\uff0c\u4e00\u822c\u60c5\u51b5\u4e0b\u6709\u4e24\u79cd\u65b9\u6cd5<\/p>\n<ul>\n<li>\u8bbe\u7f6e <code>maxSize<\/code>\u3001<code>refreshAfterWrite<\/code>\uff0c\u4e0d\u8bbe\u7f6e <code>expireAfterWrite\/expireAfterAccess<\/code>\uff0c\u8bbe\u7f6e<code>expireAfterWrite<\/code>\u5f53\u7f13\u5b58\u8fc7\u671f\u65f6\u4f1a\u540c\u6b65\u52a0\u9501\u83b7\u53d6\u7f13\u5b58\uff0c\u6240\u4ee5\u8bbe\u7f6e<code>expireAfterWrite<\/code>\u65f6\u6027\u80fd\u8f83\u597d\uff0c\u4f46\u662f\u67d0\u4e9b\u65f6\u5019\u4f1a\u53d6\u65e7\u6570\u636e,\u9002\u5408\u5141\u8bb8\u53d6\u5230\u65e7\u6570\u636e\u7684\u573a\u666f<\/li>\n<li>\u8bbe\u7f6e <code>maxSize<\/code>\u3001<code>expireAfterWrite\/expireAfterAccess<\/code>\uff0c\u4e0d\u8bbe\u7f6e refreshAfterWrite \u6570\u636e\u4e00\u81f4\u6027\u597d\uff0c\u4e0d\u4f1a\u83b7\u53d6\u5230\u65e7\u6570\u636e\uff0c\u4f46\u662f\u6027\u80fd\u6ca1\u90a3\u4e48\u597d\uff08\u5bf9\u6bd4\u8d77\u6765\uff09\uff0c\u9002\u5408\u83b7\u53d6\u6570\u636e\u65f6\u4e0d\u8017\u65f6\u7684\u573a\u666f<\/li>\n<\/ul>\n<h2>\u4e09\u3001SpringBoot\u6574\u5408Caffeine<\/h2>\n<p>\u63a8\u8350\u4e00\u4e2a\u5f00\u6e90\u514d\u8d39\u7684 Spring Boot \u5b9e\u6218\u9879\u76ee\uff1a<\/p>\n<blockquote><p><a href=\"https:\/\/link.segmentfault.com\/?enc=gaS6ChCz8rfUCVFBQXA7Mw%3D%3D.Dtx%2FLJnaIWZ6oYqbQKFpDLcpBq0ipWAgS22jFXDVaYyycVWg0aBokSu7%2BUOHmBGf342ccpxDKTWsBzSo73%2BxLg%3D%3D\" rel=\"nofollow\">https:\/\/github.com\/javastacks\/spring-boot-best-practice<\/a><\/p><\/blockquote>\n<h4>1\u3001@Cacheable\u76f8\u5173\u6ce8\u89e3<\/h4>\n<h6>1.1 \u76f8\u5173\u4f9d\u8d56<\/h6>\n<p>\u5982\u679c\u8981\u4f7f\u7528<code>@Cacheable<\/code>\u6ce8\u89e3\uff0c\u9700\u8981\u5f15\u5165\u76f8\u5173\u4f9d\u8d56\uff0c\u5e76\u5728\u4efb\u4e00\u914d\u7f6e\u7c7b\u6587\u4ef6\u4e0a\u6dfb\u52a0<code>@EnableCaching<\/code>\u6ce8\u89e3<\/p>\n<pre><code>&lt;dependency&gt;\n    &lt;groupId&gt;org.springframework.boot&lt;\/groupId&gt;\n    &lt;artifactId&gt;spring-boot-starter-cache&lt;\/artifactId&gt;\n&lt;\/dependency&gt;<\/code><\/pre>\n<h6>1.2 \u5e38\u7528\u6ce8\u89e3<\/h6>\n<ul>\n<li><strong>@Cacheable<\/strong>\uff1a\u8868\u793a\u8be5\u65b9\u6cd5\u652f\u6301\u7f13\u5b58\u3002\u5f53\u8c03\u7528\u88ab\u6ce8\u89e3\u7684\u65b9\u6cd5\u65f6\uff0c\u5982\u679c\u5bf9\u5e94\u7684\u952e\u5df2\u7ecf\u5b58\u5728\u7f13\u5b58\uff0c\u5219\u4e0d\u518d\u6267\u884c\u65b9\u6cd5\u4f53\uff0c\u800c\u4ece\u7f13\u5b58\u4e2d\u76f4\u63a5\u8fd4\u56de\u3002\u5f53\u65b9\u6cd5\u8fd4\u56denull\u65f6\uff0c\u5c06\u4e0d\u8fdb\u884c\u7f13\u5b58\u64cd\u4f5c\u3002<\/li>\n<li><strong>@CachePut<\/strong>\uff1a\u8868\u793a\u6267\u884c\u8be5\u65b9\u6cd5\u540e\uff0c\u5176\u503c\u5c06\u4f5c\u4e3a\u6700\u65b0\u7ed3\u679c\u66f4\u65b0\u5230\u7f13\u5b58\u4e2d\uff0c\u6bcf\u6b21\u90fd\u4f1a\u6267\u884c\u8be5\u65b9\u6cd5\u3002<\/li>\n<li><strong>@CacheEvict<\/strong>\uff1a\u8868\u793a\u6267\u884c\u8be5\u65b9\u6cd5\u540e\uff0c\u5c06\u89e6\u53d1\u7f13\u5b58\u6e05\u9664\u64cd\u4f5c\u3002<\/li>\n<li><strong>@Caching<\/strong>\uff1a\u7528\u4e8e\u7ec4\u5408\u524d\u4e09\u4e2a\u6ce8\u89e3\uff0c\u4f8b\u5982\uff1a<\/li>\n<\/ul>\n<pre><code>@Caching(cacheable = @Cacheable(&quot;CacheConstants.GET_USER&quot;),\n         evict = {@CacheEvict(&quot;CacheConstants.GET_DYNAMIC&quot;,allEntries = true)}\npublic User find(Integer id) {\n    return null;\n}<\/code><\/pre>\n<h6>1.3 \u5e38\u7528\u6ce8\u89e3\u5c5e\u6027<\/h6>\n<ul>\n<li><strong>cacheNames\/value<\/strong>\uff1a\u7f13\u5b58\u7ec4\u4ef6\u7684\u540d\u5b57\uff0c\u5373cacheManager\u4e2d\u7f13\u5b58\u7684\u540d\u79f0\u3002<\/li>\n<li><strong>key<\/strong>\uff1a\u7f13\u5b58\u6570\u636e\u65f6\u4f7f\u7528\u7684key\u3002\u9ed8\u8ba4\u4f7f\u7528\u65b9\u6cd5\u53c2\u6570\u503c\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528SpEL\u8868\u8fbe\u5f0f\u8fdb\u884c\u7f16\u5199\u3002<\/li>\n<li><strong>keyGenerator<\/strong>\uff1a\u548ckey\u4e8c\u9009\u4e00\u4f7f\u7528\u3002<\/li>\n<li><strong>cacheManager<\/strong>\uff1a\u6307\u5b9a\u4f7f\u7528\u7684\u7f13\u5b58\u7ba1\u7406\u5668\u3002<\/li>\n<li><strong>condition<\/strong>\uff1a\u5728\u65b9\u6cd5\u6267\u884c\u5f00\u59cb\u524d\u68c0\u67e5\uff0c\u5728\u7b26\u5408condition\u7684\u60c5\u51b5\u4e0b\uff0c\u8fdb\u884c\u7f13\u5b58<\/li>\n<li><strong>unless<\/strong>\uff1a\u5728\u65b9\u6cd5\u6267\u884c\u5b8c\u6210\u540e\u68c0\u67e5\uff0c\u5728\u7b26\u5408unless\u7684\u60c5\u51b5\u4e0b\uff0c\u4e0d\u8fdb\u884c\u7f13\u5b58<\/li>\n<li><strong>sync<\/strong>\uff1a\u662f\u5426\u4f7f\u7528\u540c\u6b65\u6a21\u5f0f\u3002\u82e5\u4f7f\u7528\u540c\u6b65\u6a21\u5f0f\uff0c\u5728\u591a\u4e2a\u7ebf\u7a0b\u540c\u65f6\u5bf9\u4e00\u4e2akey\u8fdb\u884cload\u65f6\uff0c\u5176\u4ed6\u7ebf\u7a0b\u5c06\u88ab\u963b\u585e\u3002<\/li>\n<\/ul>\n<h6>1.4 \u7f13\u5b58\u540c\u6b65\u6a21\u5f0f<\/h6>\n<p>sync\u5f00\u542f\u6216\u5173\u95ed\uff0c\u5728Cache\u548cLoadingCache\u4e2d\u7684\u8868\u73b0\u662f\u4e0d\u4e00\u81f4\u7684\uff1a<\/p>\n<ul>\n<li>Cache\u4e2d\uff0csync\u8868\u793a\u662f\u5426\u9700\u8981\u6240\u6709\u7ebf\u7a0b\u540c\u6b65\u7b49\u5f85<\/li>\n<li>LoadingCache\u4e2d\uff0csync\u8868\u793a\u5728\u8bfb\u53d6\u4e0d\u5b58\u5728\/\u5df2\u9a71\u9010\u7684key\u65f6\uff0c\u662f\u5426\u6267\u884c\u88ab\u6ce8\u89e3\u65b9\u6cd5<\/li>\n<\/ul>\n<h4>2\u3001\u5b9e\u6218<\/h4>\n<h6>2.1 \u5f15\u5165\u4f9d\u8d56<\/h6>\n<pre><code>&lt;dependency&gt;\n    &lt;groupId&gt;org.springframework.boot&lt;\/groupId&gt;\n    &lt;artifactId&gt;spring-boot-starter-cache&lt;\/artifactId&gt;\n&lt;\/dependency&gt;\n\n&lt;dependency&gt;\n    &lt;groupId&gt;com.github.ben-manes.caffeine&lt;\/groupId&gt;\n    &lt;artifactId&gt;caffeine&lt;\/artifactId&gt;\n&lt;\/dependency&gt;<\/code><\/pre>\n<h6>2.2 \u7f13\u5b58\u5e38\u91cfCacheConstants<\/h6>\n<p>\u521b\u5efa\u7f13\u5b58\u5e38\u91cf\u7c7b\uff0c\u628a\u516c\u5171\u7684\u5e38\u91cf\u63d0\u53d6\u4e00\u5c42\uff0c\u590d\u7528\uff0c\u8fd9\u91cc\u4e5f\u53ef\u4ee5\u901a\u8fc7\u914d\u7f6e\u6587\u4ef6\u52a0\u8f7d\u8fd9\u4e9b\u6570\u636e\uff0c\u4f8b\u5982<code>@ConfigurationProperties<\/code>\u548c<code>@Value<\/code><\/p>\n<pre><code>public class CacheConstants {\n    \/**\n     * \u9ed8\u8ba4\u8fc7\u671f\u65f6\u95f4\uff08\u914d\u7f6e\u7c7b\u4e2d\u6211\u4f7f\u7528\u7684\u65f6\u95f4\u5355\u4f4d\u662f\u79d2\uff0c\u6240\u4ee5\u8fd9\u91cc\u5982 3*60 \u4e3a3\u5206\u949f\uff09\n     *\/\n    public static final int DEFAULT_EXPIRES = 3 * 60;\n    public static final int EXPIRES_5_MIN = 5 * 60;\n    public static final int EXPIRES_10_MIN = 10 * 60;\n\n    public static final String GET_USER = &quot;GET:USER&quot;;\n    public static final String GET_DYNAMIC = &quot;GET:DYNAMIC&quot;;\n\n}<\/code><\/pre>\n<h6>2.3 \u7f13\u5b58\u914d\u7f6e\u7c7bCacheConfig<\/h6>\n<pre><code>@Configuration\n@EnableCaching\npublic class CacheConfig {\n    \/**\n     * Caffeine\u914d\u7f6e\u8bf4\u660e\uff1a\n     * initialCapacity=[integer]: \u521d\u59cb\u7684\u7f13\u5b58\u7a7a\u95f4\u5927\u5c0f\n     * maximumSize=[long]: \u7f13\u5b58\u7684\u6700\u5927\u6761\u6570\n     * maximumWeight=[long]: \u7f13\u5b58\u7684\u6700\u5927\u6743\u91cd\n     * expireAfterAccess=[duration]: \u6700\u540e\u4e00\u6b21\u5199\u5165\u6216\u8bbf\u95ee\u540e\u7ecf\u8fc7\u56fa\u5b9a\u65f6\u95f4\u8fc7\u671f\n     * expireAfterWrite=[duration]: \u6700\u540e\u4e00\u6b21\u5199\u5165\u540e\u7ecf\u8fc7\u56fa\u5b9a\u65f6\u95f4\u8fc7\u671f\n     * refreshAfterWrite=[duration]: \u521b\u5efa\u7f13\u5b58\u6216\u8005\u6700\u8fd1\u4e00\u6b21\u66f4\u65b0\u7f13\u5b58\u540e\u7ecf\u8fc7\u56fa\u5b9a\u7684\u65f6\u95f4\u95f4\u9694\uff0c\u5237\u65b0\u7f13\u5b58\n     * weakKeys: \u6253\u5f00key\u7684\u5f31\u5f15\u7528\n     * weakValues\uff1a\u6253\u5f00value\u7684\u5f31\u5f15\u7528\n     * softValues\uff1a\u6253\u5f00value\u7684\u8f6f\u5f15\u7528\n     * recordStats\uff1a\u5f00\u53d1\u7edf\u8ba1\u529f\u80fd\n     * \u6ce8\u610f\uff1a\n     * expireAfterWrite\u548cexpireAfterAccess\u540c\u4e8b\u5b58\u5728\u65f6\uff0c\u4ee5expireAfterWrite\u4e3a\u51c6\u3002\n     * maximumSize\u548cmaximumWeight\u4e0d\u53ef\u4ee5\u540c\u65f6\u4f7f\u7528\n     * weakValues\u548csoftValues\u4e0d\u53ef\u4ee5\u540c\u65f6\u4f7f\u7528\n     *\/\n    @Bean\n    public CacheManager cacheManager() {\n        SimpleCacheManager cacheManager = new SimpleCacheManager();\n        List&lt;CaffeineCache&gt; list = new ArrayList&lt;&gt;();\n        \/\/\u5faa\u73af\u6dfb\u52a0\u679a\u4e3e\u7c7b\u4e2d\u81ea\u5b9a\u4e49\u7684\u7f13\u5b58\uff0c\u53ef\u4ee5\u81ea\u5b9a\u4e49\n        for (CacheEnum cacheEnum : CacheEnum.values()) {\n            list.add(new CaffeineCache(cacheEnum.getName(),\n                    Caffeine.newBuilder()\n                            .initialCapacity(50)\n                            .maximumSize(1000)\n                            .expireAfterAccess(cacheEnum.getExpires(), TimeUnit.SECONDS)\n                            .build()));\n        }\n        cacheManager.setCaches(list);\n        return cacheManager;\n    }\n}<\/code><\/pre>\n<h6>2.4 \u8c03\u7528\u7f13\u5b58<\/h6>\n<p>\u8fd9\u91cc\u8981\u6ce8\u610f\u7684\u662fCache\u548c@Transactional\u4e00\u6837\u4e5f\u4f7f\u7528\u4e86\u4ee3\u7406\uff0c\u7c7b\u5185\u8c03\u7528\u5c06\u5931\u6548<\/p>\n<pre><code>\/**\n * value\uff1a\u7f13\u5b58key\u7684\u524d\u7f00\u3002\n * key\uff1a\u7f13\u5b58key\u7684\u540e\u7f00\u3002\n * sync\uff1a\u8bbe\u7f6e\u5982\u679c\u7f13\u5b58\u8fc7\u671f\u662f\u4e0d\u662f\u53ea\u653e\u4e00\u4e2a\u8bf7\u6c42\u53bb\u8bf7\u6c42\u6570\u636e\u5e93\uff0c\u5176\u4ed6\u8bf7\u6c42\u963b\u585e\uff0c\u9ed8\u8ba4\u662ffalse\uff08\u6839\u636e\u4e2a\u4eba\u9700\u6c42\uff09\u3002\n * unless\uff1a\u4e0d\u7f13\u5b58\u7a7a\u503c,\u8fd9\u91cc\u4e0d\u4f7f\u7528\uff0c\u4f1a\u62a5\u9519\n * \u67e5\u8be2\u7528\u6237\u4fe1\u606f\u7c7b\n * \u5982\u679c\u9700\u8981\u52a0\u81ea\u5b9a\u4e49\u5b57\u7b26\u4e32\uff0c\u9700\u8981\u7528\u5355\u5f15\u53f7\n * \u5982\u679c\u67e5\u8be2\u4e3anull\uff0c\u4e5f\u4f1a\u88ab\u7f13\u5b58\n *\/\n@Cacheable(value = CacheConstants.GET_USER,key = &quot;'user'+#userId&quot;,sync = true)\n@CacheEvict\npublic UserEntity getUserByUserId(Integer userId){\n    UserEntity userEntity = userMapper.findById(userId);\n    System.out.println(&quot;\u67e5\u8be2\u4e86\u6570\u636e\u5e93&quot;);\n    return userEntity;\n}<\/code><\/pre>\n<blockquote><p>\u7248\u6743\u58f0\u660e\uff1a\u672c\u6587\u4e3aCSDN\u535a\u4e3b\u300c\u9b45Lemon\u300d\u7684\u539f\u521b\u6587\u7ae0\uff0c\u9075\u5faaCC 4.0 BY-SA\u7248\u6743\u534f\u8bae\uff0c\u8f6c\u8f7d\u8bf7\u9644\u4e0a\u539f\u6587\u51fa\u5904\u94fe\u63a5\u53ca\u672c\u58f0\u660e\u3002\u539f\u6587\u94fe\u63a5\uff1a<a href=\"https:\/\/link.segmentfault.com\/?enc=FWvrUKhCLmC8WuluB1t%2BSw%3D%3D.9chlH4CfXlYDeUHBNxsTNcVD6sGtRn1qgllqlrggOK2bb4wkPUczp9pXSSCVWm8j9h7p1o%2BYjAWdgIfVZHuZFA%3D%3D\" rel=\"nofollow\">https:\/\/blog.csdn.net\/lemon_TT\/article\/details\/122905113<\/a><\/p><\/blockquote>\n<p><strong>\u8fd1\u671f\u70ed\u6587\u63a8\u8350\uff1a<\/strong><\/p>\n<p>1.<a href=\"https:\/\/link.segmentfault.com\/?enc=g7hH0uFw86tgCuqcJAmXsg%3D%3D.0XDAHIV6OYpO0TiL4YC0rxfZM966DgpoWtMl3lUFyGk%3D\" rel=\"nofollow\">1,000+ \u9053 Java\u9762\u8bd5\u9898\u53ca\u7b54\u6848\u6574\u7406(2022\u6700\u65b0\u7248)<\/a><\/p>\n<p>2.<a href=\"https:\/\/link.segmentfault.com\/?enc=4hV7wBnrcNvcwIwGONnPBQ%3D%3D.iCmiJtWnS29zXwtZHjxeUOWjoVgZ8Klb7Vx9XUzs%2BaYwcTYeRS5A0swKGpw4nII4GrVa4uUjPjD0v%2BaOPGu%2B2g%3D%3D\" rel=\"nofollow\">\u52b2\u7206\uff01Java \u534f\u7a0b\u8981\u6765\u4e86\u3002\u3002\u3002<\/a><\/p>\n<p>3.<a href=\"https:\/\/link.segmentfault.com\/?enc=IB4gJi0lG5cwj25tcFE3Gg%3D%3D.EVGdfxibSnapHQHoEWNoQzoS8wRb6PJI2JcMh0%2B%2FwK8RaInMhfXsxJLDnzEQKLrs\" rel=\"nofollow\">Spring Boot 2.x \u6559\u7a0b\uff0c\u592a\u5168\u4e86\uff01<\/a><\/p>\n<p>4.<a href=\"https:\/\/link.segmentfault.com\/?enc=BszNJSrrhePc9x3wSHTl6A%3D%3D.82Kds6aPn7rAw28%2BpPKTW%2F3gSZkFr2GKqcnI03uF01xdOZmliJ6xQ4UH1GMilU19gO3FHFz6hMVi%2Bm2aSi9gTQ%3D%3D\" rel=\"nofollow\">\u522b\u518d\u5199\u6ee1\u5c4f\u7684\u7206\u7206\u7206\u70b8\u7c7b\u4e86\uff0c\u8bd5\u8bd5\u88c5\u9970\u5668\u6a21\u5f0f\uff0c\u8fd9\u624d\u662f\u4f18\u96c5\u7684\u65b9\u5f0f\uff01\uff01<\/a><\/p>\n<p>5.<a href=\"https:\/\/link.segmentfault.com\/?enc=OvM3w6AiopIXR1sgqQ3fvg%3D%3D.RPC7LsR%2BUJbJUWnDrlvjrCozXvut51XB601eoYV3ZvNyv31jFw2dvz0%2FrO1pLUlyMiKuRBuCRQtpmbPudI6sUSaB6bPVeyWH5EeLQwzJiI0%3D\" rel=\"nofollow\">\u300aJava\u5f00\u53d1\u624b\u518c\uff08\u5d69\u5c71\u7248\uff09\u300b\u6700\u65b0\u53d1\u5e03\uff0c\u901f\u901f\u4e0b\u8f7d\uff01<\/a><\/p>\n<p>\u89c9\u5f97\u4e0d\u9519\uff0c\u522b\u5fd8\u4e86\u968f\u624b\u70b9\u8d5e+\u8f6c\u53d1\u54e6\uff01<\/p>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000043989880\">https:\/\/segmentfault.com\/a\/1190000043989880<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001Caffeine\u4ecb\u7ecd 1\u3001\u7f13\u5b58\u4ecb\u7ecd \u7f13\u5b58(Cache)\u5728\u4ee3\u7801\u4e16\u754c\u4e2d\u65e0\u5904\u4e0d\u5728\u3002\u4ece\u5e95\u5c42\u7684CPU\u591a\u7ea7\u7f13\u5b58\uff0c\u5230\u5ba2\u6237 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-10008060","post","type-post","status-publish","format-standard","hentry","category-share"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008060","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10008060"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10008060\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10008060"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10008060"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10008060"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}