{"id":106863,"date":"2024-03-22T11:50:53","date_gmt":"2024-03-22T02:50:53","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7json%e3%81%ae%e5%80%a4%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e5%a4%89%e6%9b%b4%e3%81%97%e3%81%be%e3%81%99%e3%81%8b\/"},"modified":"2024-04-04T19:21:00","modified_gmt":"2024-04-04T10:21:00","slug":"java%e3%81%a7json%e3%81%ae%e5%80%a4%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e5%a4%89%e6%9b%b4%e3%81%97%e3%81%be%e3%81%99%e3%81%8b","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/java%e3%81%a7json%e3%81%ae%e5%80%a4%e3%82%92%e3%81%a9%e3%81%ae%e3%82%88%e3%81%86%e3%81%ab%e5%a4%89%e6%9b%b4%e3%81%97%e3%81%be%e3%81%99%e3%81%8b\/","title":{"rendered":"Java\u3067JSON\u306e\u5024\u3092\u3069\u306e\u3088\u3046\u306b\u5909\u66f4\u3057\u307e\u3059\u304b?"},"content":{"rendered":"<p>Java\u3067JSON\u306e\u5024\u3092\u5909\u66f4\u3059\u308b\u624b\u9806\uff1a<\/p>\n<ol>\n<li>ObjectMapper<\/li>\n<li>\u5024\u306e\u8aad\u307f\u53d6\u308a<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">jsonString<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"{\\\"key\\\": \\\"value\\\"}\"<\/span>;\r\n<span class=\"hljs-type\">ObjectMapper<\/span> <span class=\"hljs-variable\">objectMapper<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ObjectMapper<\/span>();\r\n<span class=\"hljs-type\">JsonNode<\/span> <span class=\"hljs-variable\">jsonNode<\/span> <span class=\"hljs-operator\">=<\/span> objectMapper.readTree(jsonString);\r\n<\/code><\/pre>\n<ol>\n<li>JSON\u30ce\u30fc\u30c9<\/li>\n<li>\u53d6\u5f97(get)<\/li>\n<li>\u7f6e\u304f<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">JsonNode<\/span> <span class=\"hljs-variable\">valueNode<\/span> <span class=\"hljs-operator\">=<\/span> jsonNode.get(<span class=\"hljs-string\">\"key\"<\/span>);\r\n((ObjectNode) valueNode).put(<span class=\"hljs-string\">\"key\"<\/span>, <span class=\"hljs-string\">\"new value\"<\/span>);\r\n<\/code><\/pre>\n<ol>\n<li>ObjectMapper<\/li>\n<li>writeValueAsString()<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">modifiedJsonString<\/span> <span class=\"hljs-operator\">=<\/span> objectMapper.writeValueAsString(jsonNode);\r\n<\/code><\/pre>\n<p>\u4ee5\u4e0b\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> com.fasterxml.jackson.databind.JsonNode;\r\n<span class=\"hljs-keyword\">import<\/span> com.fasterxml.jackson.databind.ObjectMapper;\r\n<span class=\"hljs-keyword\">import<\/span> com.fasterxml.jackson.databind.node.ObjectNode;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">JsonModificationExample<\/span> {\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> <span class=\"hljs-keyword\">throws<\/span> Exception {\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">jsonString<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-string\">\"{\\\"key\\\": \\\"value\\\"}\"<\/span>;\r\n        <span class=\"hljs-type\">ObjectMapper<\/span> <span class=\"hljs-variable\">objectMapper<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">ObjectMapper<\/span>();\r\n        <span class=\"hljs-type\">JsonNode<\/span> <span class=\"hljs-variable\">jsonNode<\/span> <span class=\"hljs-operator\">=<\/span> objectMapper.readTree(jsonString);\r\n\r\n        <span class=\"hljs-type\">JsonNode<\/span> <span class=\"hljs-variable\">valueNode<\/span> <span class=\"hljs-operator\">=<\/span> jsonNode.get(<span class=\"hljs-string\">\"key\"<\/span>);\r\n        ((ObjectNode) valueNode).put(<span class=\"hljs-string\">\"key\"<\/span>, <span class=\"hljs-string\">\"new value\"<\/span>);\r\n\r\n        <span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">modifiedJsonString<\/span> <span class=\"hljs-operator\">=<\/span> objectMapper.writeValueAsString(jsonNode);\r\n        System.out.println(modifiedJsonString);\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3092\u5b9f\u884c\u3059\u308b\u3068\u3001\u5909\u66f4\u3055\u308c\u305f JSON \u6587\u5b57\u5217\u304c\u51fa\u529b\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code>{\"key\":\"new value\"}\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Java\u3067JSON\u306e\u5024\u3092\u5909\u66f4\u3059\u308b\u624b\u9806\uff1a ObjectMapper \u5024\u306e\u8aad\u307f\u53d6\u308a String jsonString = &#8220;{\\&#8221;key\\&#8221;: \\&#8221;value\\&#8221;}&#8221;; ObjectMapper objectMapper  [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-106863","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Java\u3067JSON\u306e\u5024\u3092\u3069\u306e\u3088\u3046\u306b\u5909\u66f4\u3057\u307e\u3059\u304b? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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