{"id":203263,"date":"2025-05-22T13:20:36","date_gmt":"2025-05-22T05:20:36","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203263\/"},"modified":"2025-05-22T13:20:36","modified_gmt":"2025-05-22T05:20:36","slug":"java-%e4%b8%ad%e7%9a%84%e5%a4%a7%e5%9e%8b-json-%e6%96%87%e4%bb%b6%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203263\/","title":{"rendered":"Java \u4e2d\u7684\u5927\u578b JSON \u6587\u4ef6\u5904\u7406"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Java \u4e2d\u7684\u5927\u578b JSON \u6587\u4ef6\u5904\u7406<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span>    <\/p>\n<p>\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u300aJava \u4e2d\u7684\u5927\u578b JSON \u6587\u4ef6\u5904\u7406\u300b<\/span>\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241103\/173062084767272dafdb8e3.jpg\" class=\"aligncenter\"><\/p>\n<p>\u9ad8\u6548\u7684 json \u6587\u4ef6\u5904\u7406\u5728\u73b0\u4ee3\u5e94\u7528\u7a0b\u5e8f\u4e2d\u975e\u5e38\u91cd\u8981\u3002\u5982\u679c json \u6587\u4ef6\u5f88\u5927\uff0c\u6211\u4eec\u9700\u8981\u59a5\u5584\u5904\u7406\uff0c\u4ee5\u907f\u514d\u5806\u5185\u5b58\u4e0d\u8db3\u9519\u8bef\u548c\u5927\u91cf\u8d44\u6e90\u6d88\u8017\u3002<\/p>\n<p>gson \u662f java \u4e2d\u5904\u7406 json \u6587\u4ef6\u7684\u6700\u4f73\u5e93\u4e4b\u4e00\u3002 <\/p>\n<ul>\n<li>\n<p>\u5b83\u63d0\u4f9b\u7ebf\u7a0b\u5b89\u5168\u5b9e\u4f8b\u6765\u91cd\u7528\u540c\u4e00\u5bf9\u8c61\u6765\u5904\u7406\u591a\u4e2a\u8bf7\u6c42\u3002 <\/p>\n<\/li>\n<li>\n<p>\u9664\u975e\u6709\u7279\u6b8a\u60c5\u51b5\uff0c\u5426\u5219\u5b83\u4e0d\u671f\u671b\u4efb\u4f55\u6ce8\u91ca\u53ef\u7528\u4e8e\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u3002<\/p>\n<\/li>\n<li>\n<p>\u63d0\u4f9b tojson() \u548c fromjson() \u65b9\u6cd5\u7528\u4e8e\u5e8f\u5217\u5316\u548c\u53cd\u5e8f\u5217\u5316\u3002<\/p>\n<\/li>\n<li>\n<p>\u5b83\u63d0\u4f9b\u4f7f\u7528\u6d41\u9605\u8bfb\u5668\u8bfb\u53d6\u5185\u5bb9\u7684\u652f\u6301\u3002 <\/p>\n<\/li>\n<\/ul>\n<p>\u4e0b\u9762\u662f\u4f7f\u7528 java \u6d41\u8bfb\u53d6\u5668\u8bfb\u53d6\u6587\u4ef6\u5e76\u8f6c\u6362\u4e3a java \u5bf9\u8c61\u7684\u4ee3\u7801\u7247\u6bb5\u3002\u6211\u6b63\u5728\u5bf9\u6bcf 100 \u6761\u8bb0\u5f55\u5e94\u7528\u6211\u7684\u4e1a\u52a1\u903b\u8f91\u3002 <\/p>\n<p><strong>\u5047\u8bbe<\/strong> json \u6587\u4ef6\u5177\u6709\u5982\u4e0b\u6240\u793a\u7684\u6570\u636e\u6570\u7ec4\u3002<\/p>\n<p> [<br \/> {<br \/> \u201cid\u201d\uff1a1\uff0c<br \/> \u201c\u540d\u5b57\u201d\uff1a\u201c\u827e\u7c73\u4e3d\u201d\uff0c<br \/> \u201c\u59d3\u6c0f\u201d\uff1a\u201c\u7ea6\u7ff0\u900a\u201d<br \/> }<br \/> ]<\/p>\n<p><strong>java \u4ee3\u7801<\/strong><\/p>\n<pre>private Optional&lt;Boolean&gt; readFile(String path) {\n    try (InputStream inputStream = Files.newInputStream(Path.of(path));\n         JsonReader reader = new JsonReader(new InputStreamReader(inputStream))) {\n        Instant start = Instant.now();\n        reader.beginArray();\n        List&lt;User&gt; users = new ArrayList&lt;&gt;();\n        while (reader.hasNext()) {\n            users.add(gson.fromJson(reader, User.class));\n            if (users.size() &gt;= 100) {\n                \/\/Initiate your records processing\n                \/\/You can consider processing it async way handling failure scenarios properly\n                users.clear();\n            }\n        }\n        reader.endArray();\n        LOGGER.info(\"Total time taken to process file:{}, Duration:{} (millis)\", path, Duration.between(start, Instant.now()).toMillis());\n    } catch (Exception e) {\n        LOGGER.error(\"\", e);\n        return Optional.of(false);\n    }\n    return Optional.of(true);\n}\n<\/pre>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aJava \u4e2d\u7684\u5927\u578b JSON \u6587\u4ef6\u5904\u7406\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n<p>      \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb\u5220\u9664<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Java \u4e2d\u7684\u5927\u578b JSON \u6587&#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-203263","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203263","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=203263"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203263\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203263"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203263"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203263"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}