{"id":1108,"date":"2021-03-17T14:24:06","date_gmt":"2021-03-17T05:24:06","guid":{"rendered":"https:\/\/www.opentone.co.jp\/ot-lab\/?p=1108"},"modified":"2025-05-12T10:06:19","modified_gmt":"2025-05-12T01:06:19","slug":"json-enum","status":"publish","type":"post","link":"https:\/\/www.opentone.co.jp\/ot-lab\/all\/web-system\/json-enum","title":{"rendered":"JSON\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u3092enum\u5217\u6319\u578b\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"\n

\u3053\u3093\u306b\u3061\u306f\u3002IT\u3067\u3059\u3002
\u4eca\u56de\u306f\u3001JSON\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u3092enum\u5217\u6319\u578b\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n\n\n\n

Jackson JSON Processor\u3067\u3001\u4e0b\u8a18\u306e\u3088\u3046\u306bJSON\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u3092ResponseJson\u30af\u30e9\u30b9\u306b\u30de\u30c3\u30d4\u30f3\u30b0\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n\n\n\n

\u30fbJSON\u306e\u30ec\u30b9\u30dd\u30f3\u30b9body\u5185\u5bb9<\/p>\n\n\n\n

[code]\n{\"stringParameter\":\"HOGE\",\"enumParameter\":\"1\"}\n[\/code]<\/pre>\n\n\n\n
\u30fbJSON\u306e\u30ec\u30b9\u30dd\u30f3\u30b9body\u3092ResponseJson\u30af\u30e9\u30b9\u306b\u30de\u30c3\u30d4\u30f3\u30b0<\/p>\n\n\n\n
[code]\nCloseableHttpResponse response = httpClient.execute(request);\nHttpEntity entity = response.getEntity();\nbyte[] body = EntityUtils.toByteArray(entity);\nResponseJson responseJson = OBJECT_MAPPER.readValue(body, ResponseJson.class);\n[\/code]<\/pre>\n\n\n\n
\u30fbResponseJson\u30af\u30e9\u30b9<\/p>\n\n\n\n
[code]\n@JsonIgnoreProperties(ignoreUnknown = true)\npublic class ResponseJson implements Serializable {\n\n    private static final long serialVersionUID = 3030664960834078285L;\n\n    private String stringParameter;\n\n    private EnumParameter enumParameter;\n    \n    \n    public String getStringParameter() {\n        return stringParameter;\n    }\n\n    public void setStringParameter(String stringParameter) {\n        this.stringParameter = stringParameter;\n    }\n\n    public EnumParameter getEnumParameter() {\n        return enumParameter;\n    }\n\n    public void setEnumParameter(EnumParameter enumParameter) {\n        this.enumParameter = enumParameter;\n    }\n[\/code]<\/pre>\n\n\n\n
\u30fbenum\u5217\u6319\u578b<\/p>\n\n\n\n
[code]\npublic enum EnumParameter {\n    TOKYO(\"\u6771\u4eac\", \"1\"),\n    OSAKA(\"\u5927\u962a\", \"2\");\n\n    private String name;\n\n    private String code;\n\n    CouponRewardCode(String name, String code) {\n        this.name = name;\n        this.code = code;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    public String getCode() {\n        return code;\n    }\n\n    public static EnumParameter get(String code) {\n        for (EnumParameter enumCode : EnumParameter.values()) {\n            if (StringUtils.equals(enumCode.getCode(), code)) {\n                return enumCode;\n            }\n        }\n        return null;\n    }\n}\n[\/code]<\/pre>\n\n\n\n
\u610f\u56f3\u3068\u3057\u3066\u306f\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u300c”enumParameter”:”1″\u300d\u304cResponseJson\u306eenumParameter\u306b\u300cTOKYO(“\u6771\u4eac”, “1”)\u300d\u3068\u8a2d\u5b9a\u3055\u308c\u3066\u307b\u3057\u3044\u306e\u3067\u3059\u304c<\/p>\n\n\n\n
[code]\nCaused by: org.codehaus.jackson.map.JsonMappingException: Can not construct instance of com.globalrelay.gas.appsjson.authportal.Event from String value 'enumParameter': value not one of declared Enum instance names\n[\/code]<\/pre>\n\n\n\n
\u3068\u3044\u3046\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
\u305d\u306e\u5834\u5408\u3001\u4e0b\u8a18\u306e\u901a\u308aDeserializer\u3092\u5b9a\u7fa9\u3057\u3001enum\u30af\u30e9\u30b9\u306b\u300c@JsonDeserialize(using = EnumParameterDeserializer.class)\u300d\u30a2\u30ce\u30c6\u30fc\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067\u3001
code\uff08”1″\uff09\u304c\u6765\u305f\u3089\u3001enumValue\uff08TOKYO(“\u6771\u4eac”, “1”)\uff09\u304c\u8a2d\u5b9a\u3055\u308c\u308b\u3088\u3046\u306b\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
[code]\npublic class EnumParameterDeserializer extends JsonDeserializer<Object> {\n   @Override\n    public EnumParameter deserialize(JsonParser jp, DeserializationContext ctxt) throws IOException {\n        final String jsonValue = jp.getText();\n        for (final EnumParameter enumValue : EnumParameter.values()) {\n            if (enumValue.getCode().equals(jsonValue)) {\n                return enumValue;\n            }\n        }\n        return null;\n    }\n}\n[\/code]<\/pre>\n\n\n\n
\u9006\u306bSerializer\u3082\u53ef\u80fd\u3067\u3059\u3002<\/p>\n\n\n\n
[code]\npublic class EnumParameterSerializer extends JsonSerializer<CouponRewardCode> {\n    @Override\n    public void serialize(EnumParameter value, JsonGenerator jgen, SerializerProvider provider) throws IOException {\n        jgen.writeString(value.getCode());\n    }\n}\n[\/code]<\/pre>\n
\"\"<\/a><\/div>","protected":false},"excerpt":{"rendered":"
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