{"id":202677,"date":"2025-05-22T08:57:31","date_gmt":"2025-05-22T00:57:31","guid":{"rendered":"https:\/\/server.hk\/cnblog\/202677\/"},"modified":"2025-05-22T08:57:31","modified_gmt":"2025-05-22T00:57:31","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e7%ac%ac%e4%b8%89%e6%96%b9%e5%ba%93%e4%bc%98%e5%8c%96java%e5%87%bd%e6%95%b0%e7%9a%84%e5%86%85%e5%ad%98%e4%bd%bf%e7%94%a8%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/202677\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\u4f18\u5316Java\u51fd\u6570\u7684\u5185\u5b58\u4f7f\u7528\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\u4f18\u5316Java\u51fd\u6570\u7684\u5185\u5b58\u4f7f\u7528\uff1f<\/h1>\n

\u5728\u6587\u7ae0\u5b9e\u6218\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u4e9b\u8fd9\u6837\u90a3\u6837\u7684\u95ee\u9898\uff0c\u7136\u540e\u8981\u5361\u597d\u534a\u5929\uff0c\u7b49\u95ee\u9898\u89e3\u51b3\u4e86\u624d\u53d1\u73b0\u539f\u6765\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u662f\u6ca1\u6709\u638c\u63e1\u597d\u3002\u4eca\u5929\u5c31\u6574\u7406\u5206\u4eab\u300a\u5982\u4f55\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\u4f18\u5316Java\u51fd\u6570\u7684\u5185\u5b58\u4f7f\u7528\uff1f\u300b\uff0c\u804a\u804a\uff0c\u5e0c\u671b\u53ef\u4ee5\u5e2e\u52a9\u5230\u6b63\u5728\u52aa\u529b\u8d5a\u94b1\u7684\u4f60\u3002<\/p>\n

\u901a\u8fc7\u4f7f\u7528 Apache Commons Compress \u5e93\uff0c\u53ef\u4ee5\u4f18\u5316 Java \u51fd\u6570\u7684\u5185\u5b58\u4f7f\u7528\uff0c\u65b9\u6cd5\u5305\u62ec\uff1a1. \u65e0\u635f\u538b\u7f29\uff1a\u4f7f\u7528 CompressorOutputStream \u7c7b\u6267\u884c\u65e0\u635f\u538b\u7f29\uff0c\u51cf\u5c11\u6570\u636e\u5927\u5c0f\u30022. \u589e\u91cf\u5f0f\u89e3\u6790\uff1a\u4f7f\u7528 XMLStreamReader \u7c7b\u9010\u6bb5\u5904\u7406 XML \u6587\u6863\uff0c\u907f\u514d\u4e00\u6b21\u6027\u52a0\u8f7d\u5168\u90e8\u6570\u636e\u30023. \u4f7f\u7528\u5bf9\u8c61\u6c60\uff1a\u501f\u52a9 ObjectPool \u7c7b\u521b\u5efa\u5bf9\u8c61\u6c60\uff0c\u51cf\u5c11\u5bf9\u8c61\u521b\u5efa\u548c\u9500\u6bc1\u7684\u5f00\u9500\u3002<\/p>\n

<\/p>\n

\u5982\u4f55\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\u4f18\u5316 Java \u51fd\u6570\u7684\u5185\u5b58\u4f7f\u7528\uff1a\u5b9e\u6218\u6848\u4f8b<\/strong><\/p>\n

\u7b80\u4ecb<\/strong><\/p>\n

\u5728 Java \u5f00\u53d1\u4e2d\uff0c\u5185\u5b58\u4f18\u5316\u5bf9\u4e8e\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u6027\u80fd\u548c\u6548\u7387\u81f3\u5173\u91cd\u8981\u3002\u7b2c\u4e09\u65b9\u5e93\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u663e\u8457\u51cf\u5c11\u5185\u5b58\u5360\u7528\uff0c\u63d0\u9ad8\u4ee3\u7801\u7684\u6574\u4f53\u6548\u7387\u3002\u5728\u672c\u6559\u7a0b\u4e2d\uff0c\u6211\u4eec\u5c06\u5b66\u4e60\u5982\u4f55\u4f7f\u7528 Apache Commons Compress \u5e93\u4f18\u5316 Java \u51fd\u6570\u7684\u5185\u5b58\u4f7f\u7528\u3002<\/p>\n

\u6240\u9700\u7684\u5e93<\/strong><\/p>\n

\u5728 Maven \u9879\u76ee\u4e2d\u52a0\u5165\u4ee5\u4e0b\u4f9d\u8d56\u9879\uff1a<\/p>\n

<dependency>\n    <groupId>org.apache.commons<\/groupId>\n    <artifactId>commons-compress<\/artifactId>\n    <version>1.21<\/version>\n<\/dependency><\/pre>\n
\u66ff\u4ee3\u65e0\u635f\u538b\u7f29<\/strong><\/p>\n
\u65e0\u635f\u538b\u7f29\u53ef\u4ee5\u964d\u4f4e\u6570\u636e\u7684\u5927\u5c0f\u800c\u4e0d\u4f1a\u4e22\u5931\u4efb\u4f55\u4fe1\u606f\u3002Apache Commons Compress \u63d0\u4f9b\u4e86 CompressorOutputStream<\/code> \u7c7b\u6765\u5b9e\u73b0\u65e0\u635f\u538b\u7f29\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
import org.apache.commons.compress.compressors.CompressorOutputStream;\nimport java.io.ByteArrayOutputStream;\nimport java.io.IOException;\n\npublic class MemoryOptimization {\n\n    public static void main(String[] args) throws IOException {\n        \/\/ \u539f\u6570\u636e\n        byte[] originalData = \"This is some large data that needs to be optimized\".getBytes();\n\n        \/\/ \u521b\u5efa\u5b57\u8282\u6d41\n        ByteArrayOutputStream compressedData = new ByteArrayOutputStream();\n        CompressorOutputStream compressor = new CompressorOutputStream(compressedData);\n\n        \/\/ \u5199\u5165\u6570\u636e\u5e76\u538b\u7f29\n        compressor.write(originalData);\n        compressor.close();\n\n        \/\/ \u6bd4\u8f83\u538b\u7f29\u524d\u540e\u7684\u6570\u636e\u5927\u5c0f\n        int originalSize = originalData.length;\n        int compressedSize = compressedData.size();\n        System.out.println(\"\u539f\u59cb\u5927\u5c0f\uff1a\" + originalSize);\n        System.out.println(\"\u538b\u7f29\u540e\u5927\u5c0f\uff1a\" + compressedSize);\n    }\n}<\/pre>\n
\u589e\u91cf\u5f0f\u89e3\u6790<\/strong><\/p>\n
\u589e\u91cf\u5f0f\u89e3\u6790\u5141\u8bb8\u6211\u4eec\u9010\u6bb5\u5904\u7406\u6570\u636e\uff0c\u800c\u4e0d\u5fc5\u5168\u90e8\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d\u3002XMLStreamReader<\/code> \u7c7b\u53ef\u7528\u4e8e\u589e\u91cf\u5f0f\u89e3\u6790 XML \u6587\u6863\u3002<\/p>\n
import javax.xml.stream.XMLInputFactory;\nimport javax.xml.stream.XMLStreamReader;\n\npublic class MemoryOptimization {\n\n    public static void main(String[] args) throws Exception {\n        \/\/ XML \u6587\u6863\n        String xml = \"<root><child><grandchild>...<\/grandchild><\/child><\/root>\";\n\n        \/\/ \u521b\u5efa\u589e\u91cf\u5f0f\u89e3\u6790\u5668\n        XMLInputFactory factory = XMLInputFactory.newInstance();\n        XMLStreamReader reader = factory.createXMLStreamReader(new StringReader(xml));\n\n        \/\/ \u9010\u6bb5\u89e3\u6790 XML \u6587\u6863\n        while (reader.hasNext()) {\n            int eventType = reader.next();\n\n            \/\/ \u5904\u7406 XML \u4e8b\u4ef6\uff0c\u4f8b\u5982\u5f00\u59cb\u5143\u7d20\u3001\u7ed3\u675f\u5143\u7d20\u7b49\n        }\n    }\n}<\/pre>\n
\u4f7f\u7528\u5bf9\u8c61\u6c60<\/strong><\/p>\n
\u5bf9\u8c61\u6c60\u53ef\u4ee5\u51cf\u5c11\u5bf9\u8c61\u521b\u5efa\u548c\u9500\u6bc1\u7684\u5f00\u9500\u3002Apache Commons Pool \u63d0\u4f9b\u4e86 ObjectPool<\/code> \u7c7b\u6765\u5b9e\u73b0\u5bf9\u8c61\u6c60\u3002<\/p>\n
import org.apache.commons.pool2.ObjectPool;\nimport org.apache.commons.pool2.PooledObjectFactory;\nimport org.apache.commons.pool2.impl.GenericObjectPool;\nimport org.apache.commons.pool2.impl.GenericObjectPoolConfig;\n\npublic class MemoryOptimization {\n\n    private static ObjectPool<ExpensiveObject> objectPool;\n\n    public static void main(String[] args) {\n\n        \/\/ \u521b\u5efa\u5bf9\u8c61\u6c60\u914d\u7f6e\u5bf9\u8c61\n        GenericObjectPoolConfig config = new GenericObjectPoolConfig();\n        config.setMaxTotal(10);  \/\/ \u6c60\u4e2d\u6700\u5927\u7684\u5bf9\u8c61\u6570\u91cf\n\n        \/\/ \u521b\u5efa\u5bf9\u8c61\u5de5\u5382\n        PooledObjectFactory<ExpensiveObject> factory = new MyPooledObjectFactory();\n\n        \/\/ \u521b\u5efa\u5bf9\u8c61\u6c60\n        objectPool = new GenericObjectPool<>(factory, config);\n\n        \/\/ \u4ece\u5bf9\u8c61\u6c60\u4e2d\u83b7\u53d6\u5bf9\u8c61\n        ExpensiveObject obj = pool.borrowObject();\n\n        \/\/ \u4f7f\u7528\u5bf9\u8c61\n\n        \/\/ \u5c06\u5bf9\u8c61\u5f52\u8fd8\u7ed9\u5bf9\u8c61\u6c60\n        objectPool.returnObject(obj);\n    }\n\n    static class ExpensiveObject { \/* \u7701\u7565\u6784\u9020\u51fd\u6570\u548c\u65b9\u6cd5 *\/ }\n\n    static class MyPooledObjectFactory implements PooledObjectFactory<ExpensiveObject> {\n        \/\/ \u521b\u5efa\u5bf9\u8c61\n        @Override\n        public ExpensiveObject makeObject() throws Exception {\n            return new ExpensiveObject();\n        }\n\n        \/\/ \u9500\u6bc1\u5bf9\u8c61\n        @Override\n        public void destroyObject(ExpensiveObject obj) throws Exception {\n            \/\/ ...\n        }\n\n        \/\/ \u9a8c\u8bc1\u5bf9\u8c61\u662f\u5426\u6709\u6548\n        @Override\n        public boolean validateObject(ExpensiveObject obj) {\n            return true; \/\/ \u7701\u7565\u9a8c\u8bc1\u903b\u8f91\n        }\n    }\n}<\/pre>\n
\u4eca\u5929\u5e26\u5927\u5bb6\u4e86\u89e3\u4e86\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u5e0c\u671b\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\uff1b\u5173\u4e8e\u6587\u7ae0\u7684\u6280\u672f\u77e5\u8bc6\u6211\u4eec\u4f1a\u4e00\u70b9\u70b9\u6df1\u5165\u4ecb\u7ecd\uff0c\u6b22\u8fce\u5927\u5bb6\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u4e00\u8d77\u5b66\u4e60\u7f16\u7a0b~<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u4f7f\u7528\u7b2c\u4e09\u65b9\u5e93\u4f18\u5316Java\u51fd\u6570...<\/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-202677","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202677","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=202677"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/202677\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=202677"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=202677"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=202677"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}