{"id":721,"date":"2023-11-26T23:59:06","date_gmt":"2023-11-26T14:59:06","guid":{"rendered":"https:\/\/web.cloudfree.jp\/journal\/?p=721"},"modified":"2023-11-30T08:45:21","modified_gmt":"2023-11-29T23:45:21","slug":"javascript%e3%81%a7json%e3%82%92%e8%aa%ad%e3%82%80","status":"publish","type":"post","link":"https:\/\/web.cloudfree.jp\/journal\/javascript%e3%81%a7json%e3%82%92%e8%aa%ad%e3%82%80\/","title":{"rendered":"javascript\u3067JSON\u3092\u8aad\u3080"},"content":{"rendered":"

javascript\u3067JSON\u3092\u8aad\u3080<\/h3>\n\n\n

2023-11-26 \u8a18\u8f09
\u6982\u8981 : JSON\u3092\u8aad\u3093\u3067\u4e2d\u8eab\u3092\u6271\u3048\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002
Keyword : JSON, javascript, XMLHttpRequest, FileReader, <\/p>\n\n\n\n

javascript\u306f\u66f8\u304d\u65b9\u304c\u3044\u308d\u3044\u308d\u3042\u308b\u306e\u3067\u3001Web\u3067\u30b5\u30f3\u30d7\u30eb\u3092\u307f\u3066\u3082\uff12\u3064\u3068\u540c\u3058\u3082\u306e\u304c\u306a\u3044\u611f\u3058\u3067\u3059\u3002\u3068\u304f\u306b\u30a4\u30d9\u30f3\u30c8\u3084\u7121\u540d\u95a2\u6570\u306e\u66f8\u304d\u65b9\u304c\u591a\u7a2e\u3042\u3063\u3066\u308f\u304b\u308a\u306b\u304f\u3044\u3067\u3059\u3002\u5ba3\u8a00\u3057\u3066\u3044\u306a\u3044\u5909\u6570\u540d\u304c\u767b\u5834\u3057\u305f\u308a\u3001\u540c\u671f\u975e\u540c\u671f\u306e=>\u3067\u3064\u306a\u3050\u30d1\u30a4\u30d7\u30e9\u30a4\u30f3\u7684\u51e6\u7406\u306a\u3069\u3001\u7406\u5c48\u3067\u306f\u8aad\u307f\u3068\u3051\u306a\u3044\u30bd\u30fc\u30b9\u3067\u3059\u3002

\u7121\u540d\u95a2\u6570\u306f\u306a\u308b\u3079\u304f\u4f7f\u308f\u306a\u3044\u3002\u540c\u671f\u304c\u4e00\u77ac\u306a\u3089\u540c\u671f\u306b\u3059\u308b\u3002\u4e0d\u8981\u306a\u5909\u6570\u306f\u53d7\u3051\u53d6\u3089\u306a\u3044\u3002\u5909\u6570\u3092\u4f7f\u3046\u3068\u304d\u306f\u5909\u6570\u540d\u306f\u660e\u77ad\u306b\u3064\u3051\u308b\u3002\u3068\u3044\u3046\u65b9\u91dd\u3067\u3001\u81ea\u5206\u306a\u308a\u306b\u7d0d\u5f97\u3067\u304d\u308b\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3057\u307e\u3057\u305f\u3002

\u307e\u305aWeb\u304b\u3089\u53d6\u5f97\u306e\u30b3\u30fc\u30c9\u3002fetch\u3067\u306f\u306a\u304fXMLHttpRequest\u306b\u3057\u3066\u3044\u307e\u3059\u3002
html\u30dc\u30bf\u30f3Click\u3067\u4e0b\u306epre\u306bJSON\u5185\u5bb9\u3092\u51fa\u529b\u3057\u307e\u3059\u3002<\/p>\n\n\n\n

<input type="button" value="JSON" onclick="getJSON_Http()"\/>\n<pre id="jsonHttp" style="border:solid;"><\/pre><\/code><\/pre><\/div>\n\n\n\n
function getJSON_Http() {\n    const xhr = new XMLHttpRequest();\n    xhr.open("GET", ".\/chatgpt.json", false); \/\/ false=\u975e\u540c\u671f\n    xhr.setRequestHeader('Cache-Control', 'no-cache');\n    xhr.send();\n    var text = xhr.response;\n    for (var [key, value] of jsonToMap(JSON.parse(xhr.response))) {\n        text += "\\r\\n" + key + " : " + value;\n    }\n    document.getElementById("jsonHttp").innerText = text;\n}<\/code><\/pre><\/div>\n\n\n\n
\u6b21\u306b\u30cb\u30fc\u30ba\u306f\u5c11\u306a\u3044\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u30ed\u30fc\u30ab\u30eb\u304b\u3089JSON\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u30b3\u30fc\u30c9\u3002Firefox\u3067\u306f
import jsondata from ‘.\/myfile.json’ assert {type: ‘json’};
\u306fError\u306b\u306a\u308b\u306e\u3067\u3001\u3053\u306eFileReader\u3092\u4f7f\u3046\u4ee3\u66ff\u624b\u6bb5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n
<input type="file" onchange="getJSON_File(this)"\/>\n<pre id="jsonFile" style="border:solid;">.json\u3092\u9078\u629e<\/pre><\/code><\/pre><\/div>\n\n\n\n
function getJSON_File(target_input) {\n    const reader = new FileReader();\n    reader.addEventListener("load", () => {\n        var text = reader.result;\n        for (var [key, value] of jsonToMap(JSON.parse(reader.result))) {\n            text += "\\r\\n" + key + " : " + value;\n        }\n        document.getElementById("jsonFile").innerText = text;\n    });\n    reader.readAsText(target_input.files[0]);\n}<\/code><\/pre><\/div>\n\n\n\n
for\u306e\uff13\u884c\u306f\u30b3\u30e1\u30f3\u30c8\u30a2\u30a6\u30c8\u3057\u3066\u3082\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u3002JSON\u30c7\u30fc\u30bf\u3092Map\u306b\u683c\u7d0d\u3059\u308bfunction\u3092\u547c\u3093\u3067\u3044\u307e\u3059\u3002\u518d\u5e30\u95a2\u6570\u306a\u306e\u3067\u308f\u304b\u308a\u306b\u304f\u3044\u3067\u3059\u3002<\/p>\n\n\n\n
function jsonToMap(json_object, prekey = "", mapItem = new Map()) {\n    for(var key in json_object) {\n        if (Array.isArray(json_object[key])) {\n            for (var i = 0; i < json_object[key].length; i++) {\n                jsonToMap(json_object[key][i], prekey + "\/" + key + "[" + i + "]", mapItem);\n            }\n        } else if (typeof json_object[key] == "object") {\n            jsonToMap(json_object[key], prekey + "\/" + key, mapItem);\n        } else {\n            mapItem.set(prekey + "\/" + key, json_object[key]);\n        }\n    }\n    return mapItem; \n}<\/code><\/pre><\/div>\n\n\n\n
ChatGPT3.5\u306b\u30b5\u30f3\u30d7\u30eb\u30c7\u30fc\u30bf\u3092\u4f5c\u3063\u3066\u3082\u3089\u3044\u307e\u3057\u305f\u3002
\u6ce8\u6587\uff1a
JSON\u30c7\u30fc\u30bf\u306e\u30b5\u30f3\u30d7\u30eb\u3092\u4f5c\u6210\u3057\u3066\u304f\u3060\u3055\u3044\u3002\uff12\u6bb5\u968e\u306e\u30cd\u30b9\u30c8\u304c\u3042\u308b\u3053\u3068\u3002\u914d\u5217\u3082\u4f7f\u3063\u3066\u3044\u308b\u3053\u3068\u3002
\u56de\u7b54\uff1a
\u3082\u3061\u308d\u3093\u3067\u3059\u3002\u4ee5\u4e0b\u306f2\u6bb5\u968e\u306e\u30cd\u30b9\u30c8\u3068\u914d\u5217\u3092\u542b\u3080JSON\u30c7\u30fc\u30bf\u306e\u4f8b\u3067\u3059\u3002

\u3053\u306e\u4f8b\u3067\u306f\u3001students<\/code>\u3068\u3044\u3046\u30ad\u30fc\u304c\u3042\u308a\u3001\u305d\u306e\u914d\u5217\u306b\u5b66\u751f\u306e\u60c5\u5831\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u5404\u5b66\u751f\u306fid<\/code>\u3001name<\/code>\u3001age<\/code>\u3001courses<\/code>\u3068\u3044\u3046\u30ad\u30fc\u3092\u6301\u3061\u3001courses<\/code>\u5185\u306b\u306f\u8907\u6570\u306e\u79d1\u76ee\u304c\u914d\u5217\u3068\u3057\u3066\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
{\n  \"students\": [\n    {\n      \"id\": 1,\n      \"name\": \"\u7530\u4e2d\u592a\u90ce\",\n      \"age\": 20,\n      \"courses\": [\n        {\n          \"course_id\": 101,\n          \"course_name\": \"\u6570\u5b66\"\n        },\n        {\n          \"course_id\": 102,\n          \"course_name\": \"\u7269\u7406\u5b66\"\n        }\n      ]\n    },\n    {\n      \"id\": 2,\n      \"name\": \"\u5c71\u7530\u82b1\u5b50\",\n      \"age\": 19,\n      \"courses\": [\n        {\n          \"course_id\": 103,\n          \"course_name\": \"\u5316\u5b66\"\n        },\n        {\n          \"course_id\": 104,\n          \"course_name\": \"\u751f\u7269\u5b66\"\n        }\n      ]\n    }\n  ]\n}\n<\/code><\/pre>\n\n\n\n

\u300c\u3082\u3061\u308d\u3093\u3067\u3059\u3002\u300d\u3068\u306a\uff1f
pre\u306einnerText\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u51fa\u529b\u3055\u308c\u307e\u3059\u3002Http,File\u306e\u3069\u3061\u3089\u3067\u3082\u3002<\/p>\n\n\n\n
{\n  "students": [\n    {\n      "id": 1,\n      "name": "\u7530\u4e2d\u592a\u90ce",\n      "age": 20,\n      "courses": [\n        {\n          "course_id": 101,\n          "course_name": "\u6570\u5b66"\n        },\n        {\n          "course_id": 102,\n          "course_name": "\u7269\u7406\u5b66"\n        }\n      ]\n    },\n    {\n      "id": 2,\n      "name": "\u5c71\u7530\u82b1\u5b50",\n      "age": 19,\n      "courses": [\n        {\n          "course_id": 103,\n          "course_name": "\u5316\u5b66"\n        },\n        {\n          "course_id": 104,\n          "course_name": "\u751f\u7269\u5b66"\n        }\n      ]\n    }\n  ]\n}\n\n\/students[0]\/id : 1\n\/students[0]\/name : \u7530\u4e2d\u592a\u90ce\n\/students[0]\/age : 20\n\/students[0]\/courses[0]\/course_id : 101\n\/students[0]\/courses[0]\/course_name : \u6570\u5b66\n\/students[0]\/courses[1]\/course_id : 102\n\/students[0]\/courses[1]\/course_name : \u7269\u7406\u5b66\n\/students[1]\/id : 2\n\/students[1]\/name : \u5c71\u7530\u82b1\u5b50\n\/students[1]\/age : 19\n\/students[1]\/courses[0]\/course_id : 103\n\/students[1]\/courses[0]\/course_name : \u5316\u5b66\n\/students[1]\/courses[1]\/course_id : 104\n\/students[1]\/courses[1]\/course_name : \u751f\u7269\u5b66<\/code><\/pre><\/div>\n\n\n\n
\u524d\u534a\u304cChatGPT\u30b3\u30fc\u30c9\u3068\u540c\u3058\u306b\u306a\u308b\u306e\u306f\u5f53\u305f\u308a\u524d\u3068\u3044\u3048\u3070\u5f53\u305f\u308a\u524d\u3002
\uff08[Object, Object]\u306b\u306a\u3063\u3066\u3046\u3093\u3056\u308a\u3057\u3066\u3044\u305f\u306e\u306b\u2191\u3053\u3046\u4e91\u3063\u3066\u306e\u3051\u308b\uff09

\u5f8c\u534a\u306e
\/students[0]\/id : 1
\u2026\u2026
\/students[1]\/courses[1]\/course_name : \u751f\u7269\u5b66
\u306fMap\u304b\u3089\u8aad\u307f\u3060\u3057\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
javascript\u3067JSON\u3092\u8aad\u3080\u30b3\u30fc\u30c9\u3002Web\u304b\u3089\u306fXMLHttpRequest\u3067\u3002\u30ed\u30fc\u30ab\u30eb\u304b\u3089\u306fFileReader\u3067\u3002<\/p>\n","protected":false},"author":1,"featured_media":722,"comment_status":"open","ping_status":"closed","sticky":false,"template":"wp-custom-template-x24-index","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"_links":{"self":[{"href":"https:\/\/web.cloudfree.jp\/journal\/wp-json\/wp\/v2\/posts\/721"}],"collection":[{"href":"https:\/\/web.cloudfree.jp\/journal\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/web.cloudfree.jp\/journal\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/web.cloudfree.jp\/journal\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/web.cloudfree.jp\/journal\/wp-json\/wp\/v2\/comments?post=721"}],"version-history":[{"count":0,"href":"https:\/\/web.cloudfree.jp\/journal\/wp-json\/wp\/v2\/posts\/721\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/web.cloudfree.jp\/journal\/wp-json\/wp\/v2\/media\/722"}],"wp:attachment":[{"href":"https:\/\/web.cloudfree.jp\/journal\/wp-json\/wp\/v2\/media?parent=721"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/web.cloudfree.jp\/journal\/wp-json\/wp\/v2\/categories?post=721"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/web.cloudfree.jp\/journal\/wp-json\/wp\/v2\/tags?post=721"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}