{"id":134691,"date":"2020-07-21T07:55:14","date_gmt":"2020-07-20T23:55:14","guid":{"rendered":"http:\/\/4563.org\/?p=134691"},"modified":"2020-07-21T07:55:14","modified_gmt":"2020-07-20T23:55:14","slug":"jackson-%e5%a6%82%e4%bd%95%e4%bf%9d%e5%ad%98-map-%e4%b8%ad-key-%e7%9a%84%e7%b1%bb%e5%9e%8b%e4%bf%a1%e6%81%af","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=134691","title":{"rendered":"Jackson \u5982\u4f55\u4fdd\u5b58 Map \u4e2d key \u7684\u7c7b\u578b\u4fe1\u606f"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  Jackson \u5982\u4f55\u4fdd\u5b58 Map \u4e2d key \u7684\u7c7b\u578b\u4fe1\u606f               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : JasonLaw <\/span>  <span><i><\/i> 9<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<p>\u9996\u5148\u770b\u4ee5\u4e0b\u4ee3\u7801\u4e86\u89e3\u95ee\u9898\u3002<\/p>\n<pre><code>PolymorphicTypeValidator ptv = BasicPolymorphicTypeValidator.builder().build(); ObjectMapper objectMapper = JsonMapper.builder()         .activateDefaultTyping(ptv, ObjectMapper.DefaultTyping.EVERYTHING)         .build();  \/\/ content \u4e3a`[\"Gender\",\"FEMALE\"]`\uff0c\u4fdd\u5b58\u4e86\u7c7b\u578b\u4fe1\u606f String content = objectMapper.writeValueAsString(Gender.FEMALE); <\/code><\/pre>\n<pre><code>PolymorphicTypeValidator ptv = BasicPolymorphicTypeValidator.builder().build(); ObjectMapper objectMapper = JsonMapper.builder()         .activateDefaultTyping(ptv, ObjectMapper.DefaultTyping.EVERYTHING)         .build();   Map&lt;Gender, String&gt; map = new HashMap&lt;&gt;(); map.put(Gender.FEMALE, \"v1\");  \/\/ content \u4e3a`[\"java.util.HashMap\",{\"FEMALE\":\"v1\"}]`\uff0c\u5e76\u6ca1\u6709\u4fdd\u5b58 Map \u4e2d key \u7684\u7c7b\u578b\u4fe1\u606f String content = objectMapper.writeValueAsString(map); <\/code><\/pre>\n<p>\u6211\u7684\u95ee\u9898\uff1aJackson \u53ef\u4ee5\u505a\u5230\u4fdd\u5b58 Map \u4e2d key \u7684\u7c7b\u578b\u4fe1\u606f\u5417\uff1f\u5982\u679c\u53ef\u4ee5\uff0c\u5e94\u8be5\u600e\u4e48\u505a\u5462\uff1f<\/p>\n<p>\u6211\u6240\u505a\u7684\u5c1d\u8bd5\uff1a<\/p>\n<ol>\n<li>\u6211\u5c1d\u8bd5\u8fc7\u914d\u7f6e SerializationFeature\uff0c\u4f46\u662f\u6ca1\u6709\u4e00\u4e2a\u76f8\u5173\u7684 SerializationFeature \u662f\u53ef\u4ee5\u5b9e\u73b0\u8fd9\u4e2a\u529f\u80fd\u7684\u3002<\/li>\n<li>\u6211\u53d1\u73b0<code>objectMapper.writeValueAsString(Gender.FEMALE)<\/code>\u4f7f\u7528\u7684\u662f<code>TypeWrappedSerializer<\/code>\uff0c\u6700\u540e\u8c03\u7528<code>StdScalarSerializer.serializeWithType(T value, JsonGenerator g, SerializerProvider provider, TypeSerializer typeSer)<\/code>\uff0c\u56e0\u6b64\u4fdd\u5b58\u4e86\u7c7b\u578b\u4fe1\u606f\u3002\u4f46\u662f<code>objectMapper.writeValueAsString(map)<\/code>\u4e0d\u4e00\u6837\uff0c\u5728\u5e8f\u5217\u5316 Map \u4e2d key \u7684\u65f6\u5019\uff0c\u6700\u540e\u4f1a\u8c03\u7528<code>EnumKeySerializer.serialize(Object value, JsonGenerator g, SerializerProvider serializers)<\/code>\uff0c\u53ea\u662f\u7b80\u5355\u5730\u8c03\u7528\u4e86<code>toString()<\/code>\uff0c\u56e0\u6b64\u6ca1\u6709\u4fdd\u5b58\u7c7b\u578b\u4fe1\u606f\u3002<\/li>\n<\/ol><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>7<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li data-pid=\"2482894\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : xgfan <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u4f60\u8fd9\u662f\u8981\u5e72\u5565\u554a\uff0c\u611f\u89c9\u4f60\u538b\u6839\u4e0d\u9700\u8981 json \u554a\u3002<br \/>\u53ea\u662f\u8981\u4e00\u4e2a\u7c7b\u578b\u5b89\u5168\u7684\u5e8f\u5217\u5316 \/\u53cd\u5e8f\u5217\u5316\u7684\u5de5\u5177\u7684\u8bdd\uff0c\u6ca1\u5fc5\u8981\u8ddf json \u6b7b\u78d5\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"2482895\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : wysnylc <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             json \u4e2d\u7ed3\u6784\u53ea\u6709 map \u548c\u6570\u7ec4,\u6570\u636e\u7c7b\u578b\u53ea\u6709\u5b57\u7b26\u4e32\u548c\u6570\u503c<br \/>\u6240\u6709\u7684\u53cd\u5e8f\u5217\u5316\u90fd\u662f\u6536\u5230 json \u5b57\u7b26\u4e32\u7136\u540e\u53cd\u63a8\u7ed3\u6784\u548c\u6570\u636e\u7c7b\u578b<br \/>\u6807\u51c6\u7684\u5e8f\u5217\u5316\u4e2d\u662f\u6ca1\u6709\u6cdb\u578b\u7684,\u751a\u81f3\u4e00\u4e9b\u6269\u5c55\u5b9e\u73b0\u7684\u6570\u636e\u90fd\u4f1a\u88ab\u62b9\u6389\u6bd4\u5982\u5b9e\u73b0 list \u63a5\u53e3\u52a0\u4e2a\u5c5e\u6027\u5728\u91cc\u9762\u7684\u60c5\u51b5                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"2482896\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u4e3b<\/span> <span>\u8cc7\u6df1\u5927\u4f6c : JasonLaw <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             @xgfan \u6211\u73b0\u5728\u662f\u4f7f\u7528 String \u66ff\u4ee3\u679a\u4e3e\u4f5c\u4e3a\u66ff\u4ee3\u5e94\u6025\u63aa\u65bd\uff0c\u4f46\u662f\u6211\u66f4\u5e0c\u671b Jackson \u81ea\u8eab\u80fd\u591f\u5b9e\u73b0&#8221;\u4fdd\u5b58 Map \u4e2d key \u7684\u7c7b\u578b\u4fe1\u606f&#8221;\uff0c\u56e0\u4e3a\u4e0d\u80fd\u6539\u7528\u5176\u4ed6\u7684\u5e8f\u5217\u5316 \/\u53cd\u5e8f\u5217\u5316\u673a\u5236\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"2482897\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : iyaozhen <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u4f60\u8981\u662f\u81ea\u5df1\u7cfb\u7edf\u5185\u90e8\u4f20\u8f93\u6570\u636e\u53ef\u4ee5\u4e0d\u7528 json \u5440\uff0c\u76f4\u63a5\u5e8f\u5217\u5316\u5c31\u884c<\/p>\n<p>\u6216\u8005\u4f60\u9700\u8981 pb                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"2482898\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : iseki <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u81ea\u5df1\u7f16\u5199\u5e8f\u5217\u5316\u5668\u5427\uff0c\u4f60\u9700\u8981\u81ea\u5df1\u8003\u8651\u628a\u7c7b\u578b\u4fe1\u606f\u653e\u5728\u54ea\u548c\u5b89\u5168\u95ee\u9898                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"2482899\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : passerbytiny <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             json \u7684 key\uff0c\u53ea\u80fd\u662f\u503c\u4e0d\u80fd\u662f\u5bf9\u8c61\uff1b<\/p>\n<p>java \u5bf9\u8c61\u8f6c\u6210 json \u662f\u4e0d\u4fdd\u771f\u7684\uff0c\u4e0d\u5149 key\uff0c\u6240\u6709\u7c7b\u578b\u4fe1\u606f\u90fd\u4f1a\u4e22\uff1b<\/p>\n<p>json \u8f6c\u4f1a java \u5bf9\u8c61\uff0c\u9700\u8981\u989d\u5916\u6307\u5b9a java \u5bf9\u8c61\u7684\u7c7b\u578b\uff1b                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n<li data-pid=\"2482900\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : passerbytiny <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u4ed4\u7ec6\u4e00\u770b\uff0c\u4e3b\u7528\u4e86\u591a\u6001\u7c7b\u578b\u68c0\u6d4b\u5668\u3002\u8fd9\u73a9\u610f\u4e0d\u662f json \u6807\u51c6\uff08\u81f3\u5c11\u73b0\u5728\u4e0d\u662f\uff09\uff0c\u6211\u89c9\u5f97\u4e00\u822c\u4eba\u7528\u8bd5\u9a8c\u6027\u5185\u5bb9\u662f\u5728\u7ed9\u81ea\u5df1\u6316\u5751\u3002\u53c2\u8003\u5f53\u524d javascript \u3001php \u4e0e java \u3001.NET \u5728\u524d\u7aef\u7684\u6d41\u884c\u5ea6\uff0c\u8fd9\u79cd\u5f3a\u7c7b\u578b\u7684 json \u8bd5\u9a8c\uff0c\u5f88\u96be\u6210\u4e3a\u6b63\u5f0f\u6807\u51c6\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>Jackson \u5982\u4f55\u4fdd\u5b58 Map &hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/134691"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=134691"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/134691\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=134691"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=134691"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=134691"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}