{"id":10,"date":"2026-08-17T20:21:27","date_gmt":"2026-08-17T12:21:27","guid":{"rendered":"https:\/\/www.czymfzs.cn\/?p=10"},"modified":"2026-08-17T20:21:27","modified_gmt":"2026-08-17T12:21:27","slug":"%e4%bd%a0%e4%bb%a5%e4%b8%ba-java-%e4%b8%8d%e7%94%a8%e7%ae%a1%e5%86%85%e5%ad%98%ef%bc%9f%e8%bf%99-7-%e7%a7%8d%e5%86%85%e5%ad%98%e6%b3%84%e6%bc%8f%e6%ad%a3%e5%9c%a8%e5%90%83%e6%8e%89%e4%bd%a0%e7%9a%84","status":"publish","type":"post","link":"https:\/\/www.czymfzs.cn\/index.php\/2026\/08\/17\/%e4%bd%a0%e4%bb%a5%e4%b8%ba-java-%e4%b8%8d%e7%94%a8%e7%ae%a1%e5%86%85%e5%ad%98%ef%bc%9f%e8%bf%99-7-%e7%a7%8d%e5%86%85%e5%ad%98%e6%b3%84%e6%bc%8f%e6%ad%a3%e5%9c%a8%e5%90%83%e6%8e%89%e4%bd%a0%e7%9a%84\/","title":{"rendered":"\u4f60\u4ee5\u4e3a Java \u4e0d\u7528\u7ba1\u5185\u5b58\uff1f\u8fd9 7 \u79cd\u5185\u5b58\u6cc4\u6f0f\u6b63\u5728\u5403\u6389\u4f60\u7684\u670d\u52a1\u5668"},"content":{"rendered":"\n

C \u8bed\u8a00\u7a0b\u5e8f\u5458\u5199\u4ee3\u7801\uff0c\u6700\u6015\u7684\u5c31\u662f\u5185\u5b58\u6cc4\u6f0f\u2014\u2014malloc \u4e86\u4e0d free\uff0c\u8dd1\u4e24\u5929\u7a0b\u5e8f\u5c31\u5d29\u4e86\u3002Java \u7a0b\u5e8f\u5458\u89c9\u5f97\u81ea\u5df1\u5f88\u5e78\u798f\uff1a\u6709 GC\uff08\u5783\u573e\u56de\u6536\u5668\uff09\uff0c\u7528\u5b8c\u81ea\u52a8\u5e2e\u4f60\u56de\u6536\uff0c\u4e0d\u9700\u8981\u624b\u52a8\u7ba1\u7406\u5185\u5b58\u3002\u4f46\u8fd9\u4e2a”\u5e78\u798f”\u662f\u5047\u8c61\u3002Java \u4e5f\u6709\u5185\u5b58\u6cc4\u6f0f\uff0c\u800c\u4e14\u66f4\u96be\u6392\u67e5\u3002C \u8bed\u8a00\u7684\u5185\u5b58\u6cc4\u6f0f\u662f”\u4f60\u5fd8\u4e86\u91ca\u653e”\uff0cJava \u7684\u5185\u5b58\u6cc4\u6f0f\u662f”GC \u60f3\u56de\u6536\u4f46\u6536\u4e0d\u6389”\u2014\u2014\u56e0\u4e3a\u6709\u4e1c\u897f\u8fd8\u5728\u5f15\u7528\u7740\u5b83\u3002\u4eca\u5929\u7528 7 \u6bb5\u4ee3\u7801\uff0c\u628a\u8fd9 7 \u79cd\u6700\u5e38\u89c1\u7684 Java \u5185\u5b58\u6cc4\u6f0f\u5168\u62c6\u4e86\u3002\u6bcf\u4e00\u79cd\u90fd\u5728\u751f\u4ea7\u73af\u5883\u91cc\u51fa\u8fc7\u4e8b\u3002<\/p>\n\n\n\n

\u4e00\u3001\u9759\u6001\u96c6\u5408\u7c7b\u2014\u2014\u6700\u5927\u7684”\u5185\u5b58\u9ed1\u6d1e”<\/h1>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n

\u9759\u6001\u96c6\u5408\u662f Java \u5185\u5b58\u6cc4\u6f0f\u7684\u7b2c\u4e00\u5927\u6740\u624b\u3002\u4f60\u5f80 static Map \u91cc\u585e\u6570\u636e\uff0c\u89c9\u5f97\u662f”\u7f13\u5b58”\uff0c\u5176\u5b9e\u662f\u4e00\u4e2a\u65e0\u9650\u81a8\u80c0\u7684\u5185\u5b58\u9ed1\u6d1e\u3002https:\/\/wxa.wxs.qq.com\/tmpl\/px\/base_tmpl.html<\/p>\n\n\n\n

\u4e8c\u3001ThreadLocal \u6ca1\u6709 remove<\/h1>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n

ThreadLocal \u5728 Spring \u6846\u67b6\u91cc\u65e0\u5904\u4e0d\u5728\u2014\u2014SecurityContext\u3001RequestContext\u3001TransactionContext \u90fd\u7528\u4e86\u5b83\u3002\u5982\u679c\u4f60\u81ea\u5df1\u5199\u4ee3\u7801\u7528\u4e86 ThreadLocal\uff0c\u8bb0\u4f4f\uff1aset \u4e86\u5c31\u4e00\u5b9a\u8981 remove\u3002<\/p>\n\n\n\n

\u4e09\u3001\u76d1\u542c\u5668\u548c\u56de\u8c03\u6ca1\u6709\u6ce8\u9500<\/h1>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n

\u8fd9\u4e2a\u5751\u5728 Android \u5f00\u53d1\u91cc\u5c24\u5176\u4e25\u91cd\u3002\u6ce8\u518c\u4e86 BroadcastReceiver \u6ca1\u6ce8\u9500\uff0c\u6574\u4e2a Activity \u90fd\u56de\u6536\u4e0d\u4e86\u3002Java \u540e\u7aef\u4e5f\u4e00\u6837\u2014\u2014\u624b\u52a8\u6ce8\u518c\u7684 Spring Listener \u6ca1\u6ce8\u9500\uff0c\u5bf9\u8c61\u6c38\u8fdc\u6302\u5728\u5185\u5b58\u91cc\u3002<\/p>\n\n\n\n

\u56db\u3001\u672a\u5173\u95ed\u7684\u8d44\u6e90\u2014\u2014IO \u6d41\u3001\u8fde\u63a5\u3001\u9501<\/h1>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n

“Too many open files”\u8fd9\u4e2a\u62a5\u9519\u4f60\u89c1\u8fc7\u5417\uff1f\u5982\u679c\u89c1\u8fc7\uff0c\u5927\u6982\u7387\u5c31\u662f\u8d44\u6e90\u6ca1\u5173\u3002Java \u7684 try-with-resources \u89e3\u51b3\u4e86 90% \u7684\u95ee\u9898\uff0c\u4f46\u5269\u4e0b 10% \u662f\u90a3\u4e9b\u6ca1\u6709\u5b9e\u73b0 AutoCloseable \u7684\u8d44\u6e90\u2014\u2014\u6bd4\u5982 JNI \u8c03\u7528\u7684 native \u5185\u5b58\u3002<\/p>\n\n\n\n

\u4e94\u3001\u5185\u90e8\u7c7b\u6301\u6709\u5916\u90e8\u7c7b\u5f15\u7528<\/h1>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n

\u975e\u9759\u6001\u5185\u90e8\u7c7b\u6301\u6709\u5916\u90e8\u7c7b\u5f15\u7528\u2014\u2014\u8fd9\u662f\u4e00\u4e2a\u975e\u5e38\u9690\u853d\u7684\u6cc4\u6f0f\u3002\u4ee3\u7801\u770b\u8d77\u6765\u6ca1\u95ee\u9898\uff0cGC \u4e5f\u627e\u4e0d\u5230”\u8c01\u5728\u5f15\u7528”\uff0c\u56e0\u4e3a\u5f15\u7528\u94fe\u662f\u9690\u5f0f\u7684\u3002<\/p>\n\n\n\n

\u516d\u3001\u8fc7\u671f\u5bf9\u8c61\u2014\u2014\u7f13\u5b58\u4e86\u4f46\u4e0d\u77e5\u9053\u8fc7\u671f<\/h1>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n

\u7f13\u5b58\u662f\u597d\u4e8b\uff0c\u4f46\u7f13\u5b58\u6ca1\u6709\u8fc7\u671f\u65f6\u95f4\u5c31\u662f\u5185\u5b58\u6cc4\u6f0f\u3002C \u8bed\u8a00\u7a0b\u5e8f\u5458\u4e0d\u4f1a\u9047\u5230\u8fd9\u4e2a\u95ee\u9898\u2014\u2014\u56e0\u4e3a\u4ed6\u4eec\u6839\u672c\u4e0d\u4f1a\u7528 HashMap \u505a\u7f13\u5b58\uff0c\u4ed6\u4eec\u4f1a\u7528 Redis\u3002<\/p>\n\n\n\n

\u4e03\u3001\u6b63\u5219\u8868\u8fbe\u5f0f\u2014\u2014\u9690\u85cf\u7684\u5185\u5b58\u70b8\u5f39<\/h1>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n
\"\u56fe\u7247\"\/<\/figure>\n\n\n\n

\u6b63\u5219\u8868\u8fbe\u5f0f\u672c\u8eab\u4e0d\u662f\u5185\u5b58\u6cc4\u6f0f\uff0c\u4f46 Pattern.compile \u91cd\u590d\u7f16\u8bd1 + \u56de\u6eaf\u707e\u5bb3\uff0c\u662f\u751f\u4ea7\u73af\u5883\u4e2d\u5f88\u5bb9\u6613\u88ab\u5ffd\u89c6\u7684\u6027\u80fd\u548c\u5185\u5b58\u95ee\u9898\u3002\u4e00\u53e5\u8bdd\u8bb0\u4f4f\uff1aJust because the garbage collector exists doesn’t mean you can stop thinking about memory.https:\/\/wxa.wxs.qq.com\/tmpl\/px\/base_tmpl.html\uff08\u5783\u573e\u56de\u6536\u5668\u5b58\u5728\uff0c\u4e0d\u4ee3\u8868\u4f60\u53ef\u4ee5\u4e0d\u518d\u601d\u8003\u5185\u5b58\u95ee\u9898\u3002\uff09<\/p>\n\n\n\n

\u603b\u7ed3\uff1aJava \u5185\u5b58\u6cc4\u6f0f\u901f\u67e5\u8868<\/h1>\n\n\n\n
\u7c7b\u578b<\/th>\u6839\u56e0<\/th>\u4fee\u590d\u65b9\u5f0f<\/th><\/tr><\/thead>
\u9759\u6001\u96c6\u5408<\/td>\u751f\u547d\u5468\u671f = \u5e94\u7528\u751f\u547d\u5468\u671f<\/td>\u7528\u6709\u754c\u7f13\u5b58\uff08Caffeine\uff09<\/td><\/tr>
ThreadLocal<\/td>\u7ebf\u7a0b\u6c60\u590d\u7528\uff0c\u6ca1 remove<\/td>finally \u91cc remove()<\/td><\/tr>
\u76d1\u542c\u5668\/\u56de\u8c03<\/td>\u6ce8\u518c\u4e86\u6ca1\u6ce8\u9500<\/td>register\/unregister \u914d\u5bf9<\/td><\/tr>
\u672a\u5173\u95ed\u8d44\u6e90<\/td>IO \u6d41\u3001\u8fde\u63a5\u6ca1\u5173<\/td>try-with-resources<\/td><\/tr>
\u5185\u90e8\u7c7b\u5f15\u7528<\/td>\u975e\u9759\u6001\u5185\u90e8\u7c7b\u6301\u6709\u5916\u90e8\u7c7b\u5f15\u7528<\/td>\u7528 static \u5185\u90e8\u7c7b\u6216 lambda<\/td><\/tr>
\u8fc7\u671f\u5bf9\u8c61<\/td>\u7f13\u5b58\u6ca1\u8bbe\u8fc7\u671f\u65f6\u95f4<\/td>\u7528 Caffeine\/Guava Cache<\/td><\/tr>
\u6b63\u5219\u91cd\u590d\u7f16\u8bd1<\/td>\u6bcf\u6b21\u8c03\u7528\u90fd compile<\/td>\u9884\u7f16\u8bd1\u4e3a static final<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u4e00\u53e5\u8bdd\u603b\u7ed3\uff1aJava \u6709 GC\uff0c\u4f46 GC \u4e0d\u662f\u4e07\u80fd\u7684\u3002\u6709\u5f15\u7528\u7684\u5bf9\u8c61\uff0cGC \u6536\u4e0d\u6389\u3002<\/p>\n\n\n\n

\u5927\u5bb6\u6709\u4efb\u4f55\u4e0d\u61c2\u7684\u5730\u65b9\uff0c\u6216\u8005\u9879\u76ee\u642d\u5efa\u9047\u5230\u4e86\u95ee\u9898\uff0c\u90fd\u53ef\u4ee5\u5728\u8bc4\u8bba\u533a\u7559\u8a00\uff0c\u6211\u90fd\u4f1a\u4e00\u4e00\u56de\u590d\u3002\u5982\u679c\u8fd9\u7bc7\u5185\u5bb9\u5bf9\u4f60\u6709\u5e2e\u52a9\uff0c\u522b\u5fd8\u4e86\u70b9\u8d5e\u3001\u5728\u770b\u3001\u8f6c\u53d1\u7ed9\u8eab\u8fb9\u540c\u6837\u5728\u5b66Java\u7684\u670b\u53cb\u3002<\/p>\n\n\n\n

\u6211\u4eec\u4e0b\u671f\u89c1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

C \u8bed\u8a00\u7a0b\u5e8f\u5458\u5199\u4ee3\u7801\uff0c\u6700\u6015\u7684\u5c31\u662f\u5185\u5b58\u6cc4\u6f0f\u2014\u2014malloc \u4e86\u4e0d free\uff0c\u8dd1\u4e24\u5929\u7a0b\u5e8f\u5c31\u5d29\u4e86\u3002Java \u7a0b\u5e8f\u5458\u89c9 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-10","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/www.czymfzs.cn\/index.php\/wp-json\/wp\/v2\/posts\/10","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.czymfzs.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.czymfzs.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.czymfzs.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.czymfzs.cn\/index.php\/wp-json\/wp\/v2\/comments?post=10"}],"version-history":[{"count":1,"href":"https:\/\/www.czymfzs.cn\/index.php\/wp-json\/wp\/v2\/posts\/10\/revisions"}],"predecessor-version":[{"id":11,"href":"https:\/\/www.czymfzs.cn\/index.php\/wp-json\/wp\/v2\/posts\/10\/revisions\/11"}],"wp:attachment":[{"href":"https:\/\/www.czymfzs.cn\/index.php\/wp-json\/wp\/v2\/media?parent=10"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.czymfzs.cn\/index.php\/wp-json\/wp\/v2\/categories?post=10"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.czymfzs.cn\/index.php\/wp-json\/wp\/v2\/tags?post=10"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}