{"id":167390,"date":"2020-10-13T13:20:15","date_gmt":"2020-10-13T05:20:15","guid":{"rendered":"http:\/\/4563.org\/?p=167390"},"modified":"2020-10-13T13:20:15","modified_gmt":"2020-10-13T05:20:15","slug":"%e8%af%b7%e6%95%99%e5%a4%a7%e5%ae%b6-jackson-%e6%b3%9b%e5%9e%8b%e5%8f%8d%e5%ba%8f%e5%88%97%e5%8c%96%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=167390","title":{"rendered":"\u8bf7\u6559\u5927\u5bb6 Jackson \u6cdb\u578b\u53cd\u5e8f\u5217\u5316\u95ee\u9898"},"content":{"rendered":"
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\u8bf7\u6559\u5927\u5bb6 Jackson \u6cdb\u578b\u53cd\u5e8f\u5217\u5316\u95ee\u9898 <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : sdbybyd <\/span> <\/i> 0<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n
 class R<T> {   private T data; }  class Item {   private R<List<String>> message; }  class Channel<T> {   private T data; } <\/code><\/pre>\n
 Channel<Item> i ??? <\/code><\/pre>\n
\u8bf7\u6559\u4e0b\u6700\u540e\u4e00\u4e2a Channel<Item> \u8981\u600e\u4e48\u53cd\u5e8f\u5217\u5316\u5462\uff1f<\/p>\n
             JavaType type = mapper.getTypeFactory()                     .constructParametricType(                             Channel.class,                             Item.class);             Channel<Item> body = mapper.readValue(str, type); <\/code><\/pre>\n
\u8fd9\u6837\u505a\u7684\u8bdd\u62a5\u9519\uff0cR \u7c7b\u578b\u8bc6\u522b\u4e0d\u51fa\u6765<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (17<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : Cbdy <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7528 type reference \u8bd5\u8bd5\uff1f\uff0c\u53c2\u8003\u8fd9\u4e2a
    https:\/\/github.com\/cbdyzj\/nano-bot\/blob\/master\/common\/src\/main\/java\/nano\/support\/Json.java                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : xuanbg <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u628a List<String>\u5c01\u88c5\u6210\u4e00\u4e2a\u5bf9\u8c61                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : xuanbg <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @xuanbg \u770b\u9519\u9898\u76ee\u4e86\uff0c\u4f60\u8fd9\u4e2a\u6cdb\u578b\u5d4c\u5957\uff0c\u83b7\u53d6 type \u4e5f\u8981\u5d4c\u5957\u554a\uff0c\u54ea\u80fd\u4e00\u4e0b\u5b50\u5c31\u5f97\u5230\u5b8c\u6574\u7684\u7c7b\u578b\u5462\u3002\u8bd5\u8bd5\u770b\u4e0b\u9762\u7684\u4ee3\u7801
    JavaType r = mapper.getTypeFactory().constructParametricType(R.class, String.class);
    JavaType i = mapper.getTypeFactory().constructParametricType(Item.class, r);
    JavaType c = mapper.getTypeFactory().constructParametricType(Channel.class, i);<\/p>\n
    Channel<Item> body = mapper.readValue(str, c);                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : xuanbg <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u8fd8\u662f\u5199\u9519\u4e86\u2026\u2026<\/p>\n
    @xuanbg \u770b\u9519\u9898\u76ee\u4e86\uff0c\u4f60\u8fd9\u4e2a\u6cdb\u578b\u5d4c\u5957\uff0c\u83b7\u53d6 type \u4e5f\u8981\u5d4c\u5957\u554a\uff0c\u54ea\u80fd\u4e00\u4e0b\u5b50\u5c31\u5f97\u5230\u5b8c\u6574\u7684\u7c7b\u578b\u5462\u3002\u8bd5\u8bd5\u770b\u4e0b\u9762\u7684\u4ee3\u7801
    JavaType r = mapper.getTypeFactory().constructParametricType(List.class, String.class);
    JavaType i = mapper.getTypeFactory().constructParametricType(Item.class, r);
    JavaType c = mapper.getTypeFactory().constructParametricType(Channel.class, i);<\/p>\n
    Channel<Item> body = mapper.readValue(str, c);                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : xuanbg <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u597d\u5427\u2026\u2026<\/p>\n
    JavaType list = mapper.getTypeFactory().constructParametricType(List.class, String.class);
    JavaType r = mapper.getTypeFactory().constructParametricType(R.class, list);
    JavaType item = mapper.getTypeFactory().constructParametricType(Item.class, r);
    JavaType channel = mapper.getTypeFactory().constructParametricType(Channel.class, i);                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : qwerthhusn <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 mapper.readValue(str, new TypeReference<Channel<Item>>() {});
    \u5c31\u884c\u4e86<\/p>\n
    Item \u91cc\u9762\u7684\u6cdb\u578b Jackson \u80fd\u53d6\u5230\u7684\uff0c\u4f60\u4e0d\u7528\u5173\u5fc3                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : passerbytiny <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 Class \u7c7b\u578b\u7684\u65b9\u6cd5\u53c2\u6570\uff0c\u5b9e\u53c2\u53ea\u63a5\u53d7\u771f\u5b9e\u7c7b\u578b\uff0c\u4e0d\u63a5\u53d7\u6cdb\u578b\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : 90d0n <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 new TypeReference<Channel<Item>>() {}                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : qinxi <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @JsonTypeInfo
    @JsonSubTypes                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : 0x666666 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4e0a\u8bf4\u7684\u5bf9\uff0c\u9047\u5230\u6cdb\u578b\u7edf\u4e00 TypeReference \u89e3\u51b3\u5c31\u5b8c\u4e8b\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : GM <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4e24\u4e2a\u65b9\u6cd5\uff1a
    \u4e00\u4e2a\u662f\u4e0a\u8bf4\u7684 new TypeReference<Channel<Item>>() {}
    \u7b2c\u4e8c\u4e2a\uff0c\u7b80\u5355\u7c97\u66b4\uff0c\u76f4\u63a5\u5b9a\u4e49\u4e00\u4e2a\u7c7b\uff1a
    public static class ChannelItem extends Channel<Item> {}<\/p>\n
    \u540e\u7eed\u6240\u6709\u5e8f\u5217\u5316\u3001\u53cd\u5e8f\u5217\u5316\u90fd\u7528\u8fd9\u4e2a ChannelItem                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sdbybyd <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @Cbdy @90d0n @GM TypeReference \u53ea\u80fd\u63a8\u65ad\u9876\u5c42\u7c7b\u578b\uff0c\u4f1a\u62a5\u9519\uff0c\u6570\u636e\u6210\u5458\u6cdb\u578b\u600e\u4e48\u63a8\u65ad\u5462\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sdbybyd <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @xuanbg \u4f60\u8fd9\u4e2a\u662f\u5d4c\u5957\u6cdb\u578b\u7684\u505a\u6cd5\uff0c\u4f46\u662f\u4ed4\u7ec6\u770b\u4e0b\u6570\u636e\u6210\u5458\u662f\u6cdb\u578b\u600e\u4e48\u641e\u5462\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : Elroooo0Y <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 item \u4e0a\u9762\u4e0d\u52a0\u6cdb\u578b
    \u81ea\u5df1\u7684\u90fd\u4e0d\u77e5\u9053 R \u7684\u5177\u4f53\u7c7b\u578b\u662f\u4ec0\u4e48
    jackson \u600e\u4e48\u4f1a\u77e5\u9053\u5462 .<\/p>\n
    \u5982\u679c R \u4e0d\u80fd\u8868\u793a\u51fa\u6765\u7684\u8bdd \u53ef\u4ee5\u5728 json \u5b57\u7b26\u91cc\u9762\u8bd5\u8bd5 “class”\u5173\u952e\u5b57\u8868\u793a\u4e00\u4e0b\u5177\u4f53\u7684\u6cdb\u578b\u7c7b\u578b                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sdbybyd <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @qinxi \u4f60\u8fd9\u4e2a\u662f\u591a\u6001\u65f6\u7684\u505a\u6cd5\uff0c\u4e0d\u80fd\u7528\u4e8e\u590d\u6742\u6cdb\u578b\u5427                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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     \u8cc7\u6df1\u5927\u4f6c : Elroooo0Y <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @Elroooo0Y <\/p>\n
    \u8fd9\u4e48\u5199
    {
     “condition”: {
     “class”: “com.github.Test”,
     “id”: {
     “uid”: 1000
     },
     “source”: 1
     }
    }                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : sdbybyd <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7edf\u4e00\u56de\u590d\uff0c\u4f7f\u7528 JsonNode \u4e34\u65f6\u89e3\u51b3\u4e86\uff0c\u4e0d\u80fd\u63a8\u65ad\u7684\u6cdb\u578b\u5b57\u6bb5\u5355\u72ec\u8bfb\u53d6 string \u51fa\u6765\u540e\u518d\u91cd\u65b0\u53cd\u5e8f\u5217\u5316\uff08\u8fd9\u65f6 JavaType \u6216 TypeReference \u90fd\u53ef\u4ee5\uff09                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    \u8bf7\u6559\u5927\u5bb6 Jackson \u6cdb\u578b\u53cd\u5e8f…<\/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\/167390"}],"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=167390"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/167390\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=167390"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=167390"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=167390"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}