{"id":29798,"date":"2024-03-18T22:21:05","date_gmt":"2024-03-18T13:21:05","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/29798-2\/"},"modified":"2024-03-22T21:50:27","modified_gmt":"2024-03-22T12:50:27","slug":"29798-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/29798-2\/","title":{"rendered":""},"content":{"rendered":"<p>Jackson\u306e\u4e2d\u3067\u3001\u30ab\u30b9\u30bf\u30e0\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3059\u308b\u305f\u3081\u306b@JsonSerialize\u6ce8\u91c8\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u4f8b\u3067\u3059\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">CustomObject<\/span> {\r\n    <span class=\"hljs-keyword\">private<\/span> String property1;\r\n    <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-type\">int<\/span> property2;\r\n\r\n    <span class=\"hljs-comment\">\/\/ \u6784\u9020\u65b9\u6cd5\u548cgetter\/setter\u7701\u7565<\/span>\r\n\r\n    <span class=\"hljs-meta\">@JsonSerialize(using = CustomSerializer.class)<\/span>\r\n    <span class=\"hljs-keyword\">public<\/span> String <span class=\"hljs-title function_\">getProperty1<\/span><span class=\"hljs-params\">()<\/span> {\r\n        <span class=\"hljs-keyword\">return<\/span> property1;\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u300c\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001@JsonSerialize\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u4f7f\u7528\u3057\u3066\u3001\u30ab\u30b9\u30bf\u30e0\u30b7\u30ea\u30a2\u30e9\u30a4\u30b6\u30fc\u30af\u30e9\u30b9CustomSerializer\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u30ab\u30b9\u30bf\u30e0\u30b7\u30ea\u30a2\u30e9\u30a4\u30b6\u30fc\u30af\u30e9\u30b9\u306e\u5b9f\u88c5\u4f8b\u3067\u3059\uff1a\u300d<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">CustomSerializer<\/span> <span class=\"hljs-keyword\">extends<\/span> <span class=\"hljs-title class_\">JsonSerializer<\/span>&lt;String&gt; {\r\n    <span class=\"hljs-meta\">@Override<\/span>\r\n    <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">serialize<\/span><span class=\"hljs-params\">(String value, JsonGenerator gen, SerializerProvider serializers)<\/span> <span class=\"hljs-keyword\">throws<\/span> IOException {\r\n        <span class=\"hljs-comment\">\/\/ \u5728\u8fd9\u91cc\u5b9e\u73b0\u81ea\u5b9a\u4e49\u5e8f\u5217\u5316\u7684\u903b\u8f91<\/span>\r\n        gen.writeString(value);  <span class=\"hljs-comment\">\/\/ \u8fd9\u91cc\u7b80\u5355\u5730\u5c06\u503c\u76f4\u63a5\u5e8f\u5217\u5316\u4e3a\u5b57\u7b26\u4e32<\/span>\r\n    }\r\n}\r\n<\/code><\/pre>\n<p>\u30ab\u30b9\u30bf\u30e0\u30b7\u30ea\u30a2\u30e9\u30a4\u30b6\u30af\u30e9\u30b9\u5185\u3067\u3001serialize\u30e1\u30bd\u30c3\u30c9\u3092\u30aa\u30fc\u30d0\u30fc\u30e9\u30a4\u30c9\u3057\u3066\u30ab\u30b9\u30bf\u30e0\u30b7\u30ea\u30a2\u30e9\u30a4\u30bc\u30fc\u30b7\u30e7\u30f3\u30ed\u30b8\u30c3\u30af\u3092\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001\u5024\u3092\u5358\u7d14\u306b\u6587\u5b57\u5217\u306b\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3057\u3001\u305d\u308c\u3092JsonGenerator\u306ewriteString\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u51fa\u529b\u30b9\u30c8\u30ea\u30fc\u30e0\u306b\u66f8\u304d\u8fbc\u307f\u307e\u3059\u3002<\/p>\n<p>JsonSerializer\u3092\u7d99\u627f\u3057\u305f\u30ab\u30b9\u30bf\u30e0\u30b7\u30ea\u30a2\u30e9\u30a4\u30b6\u30af\u30e9\u30b9\u306f\u3001\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3059\u308b\u578b\u3092\u6307\u5b9a\u3059\u308b\u305f\u3081\u306b\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001\u79c1\u305f\u3061\u306f\u6587\u5b57\u5217\u3092\u30b8\u30a7\u30cd\u30ea\u30c3\u30af\u30d1\u30e9\u30e1\u30fc\u30bf\u3068\u3057\u3066\u4f7f\u7528\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u3053\u306e\u30ab\u30b9\u30bf\u30e0\u30b7\u30ea\u30a2\u30e9\u30a4\u30b6\u30af\u30e9\u30b9\u306f\u6587\u5b57\u5217\u578b\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u307f\u3092\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002\u4ed6\u306e\u578b\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3057\u305f\u3044\u5834\u5408\u306f\u3001\u305d\u308c\u306b\u5bfe\u5fdc\u3059\u308b\u30ab\u30b9\u30bf\u30e0\u30b7\u30ea\u30a2\u30e9\u30a4\u30b6\u30af\u30e9\u30b9\u3092\u4f5c\u6210\u3057\u3066\u5b9f\u88c5\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>Jackson\u3092\u4f7f\u7528\u3057\u3066\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3059\u308b\u969b\u3001CustomObject\u5185\u306eproperty1\u3092\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3059\u308b\u305f\u3081\u306bCustomSerializer\u304c\u81ea\u52d5\u7684\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">ObjectMapper<\/span> <span class=\"hljs-variable\">mapper<\/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\">CustomObject<\/span> <span class=\"hljs-variable\">obj<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">new<\/span> <span class=\"hljs-title class_\">CustomObject<\/span>();\r\nobj.setProperty1(<span class=\"hljs-string\">\"value\"<\/span>);\r\n<span class=\"hljs-type\">String<\/span> <span class=\"hljs-variable\">json<\/span> <span class=\"hljs-operator\">=<\/span> mapper.writeValueAsString(obj);\r\nSystem.out.println(json);  <span class=\"hljs-comment\">\/\/ \u8f93\u51fa: {\"property1\":\"value\"}<\/span>\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>Jackson\u306e\u4e2d\u3067\u3001\u30ab\u30b9\u30bf\u30e0\u30b7\u30ea\u30a2\u30e9\u30a4\u30ba\u3059\u308b\u305f\u3081\u306b@JsonSerialize\u6ce8\u91c8\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u4f8b\u3067\u3059\uff1a public class CustomObject { private String prop [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-29798","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>- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, 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