{"id":137260,"date":"2020-07-20T12:21:50","date_gmt":"2020-07-20T04:21:50","guid":{"rendered":"http:\/\/4563.org\/?p=137260"},"modified":"2020-07-20T12:21:50","modified_gmt":"2020-07-20T04:21:50","slug":"%e5%9c%a8-java-%e4%b8%ad%e4%bb%a5%e4%b8%8b-json-%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%80%8e%e4%b9%88%e7%94%a8-gson-%e5%8f%8d%e5%ba%8f%e5%88%97%e5%8c%96%ef%bc%8c%e8%b0%a2%e8%b0%a2%e3%80%82","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=137260","title":{"rendered":"\u5728 Java \u4e2d\u4ee5\u4e0b json \u5b57\u7b26\u4e32\u600e\u4e48\u7528 gson \u53cd\u5e8f\u5217\u5316\uff0c\u8c22\u8c22\u3002"},"content":{"rendered":"
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\u5728 Java \u4e2d\u4ee5\u4e0b json \u5b57\u7b26\u4e32\u600e\u4e48\u7528 gson \u53cd\u5e8f\u5217\u5316\uff0c\u8c22\u8c22\u3002 <\/h1>\n

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\u8cc7\u6df1\u5927\u4f6c : starry97 <\/span> <\/i> 5<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u672c\u4eba\u521a\u5b66 java\uff0c\u9009\u62e9\u60f3\u5bf9\u8fd9\u4e2a json \u5b57\u7b26\u4e32\u53cd\u5e8f\u5217\u5316\uff0c\u7f51\u4e86\u627e\u4e86\u597d\u591a demo \u90fd\u5931\u8d25\uff0c\u7279\u6765\u8bf7\u6559\u4e0b\u5927\u5bb6\u8fd9\u4e2a\u8be5\u600e\u4e48\u53cd\u5e8f\u5217\u5316\uff0c\u8c22\u8c22\u3002<\/p>\n

{     \"GroupName1\":{         \"name1\":{             \"name\":\"li\",             \"age\":22         },         \"name2\":{             \"name\":\"zhang\",             \"age\":23         }     },     \"GroupName2\":{         \"name1\":{             \"name\":\"li\",             \"age\":22         },         \"name2\":{             \"name\":\"zhang\",             \"age\":23         },         \"name3\":{             \"name\":\"wang\",             \"age\":22         }     }, } <\/code><\/pre>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (17<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
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     \u8cc7\u6df1\u5927\u4f6c : GM <\/span>  <\/div>\n
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                                                                 \u5b9a\u4e49\u4e00\u4e2a\u7ed3\u6784\u76f8\u540c\u7684 pojo \u4e0d\u5c31\u53ef\u4ee5\u4e86\u4e48\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : Jacky23333 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u76f4\u63a5\u770b github \u4e0a\u9762\u627e gson \u6587\u6863\u5c31\u597d\u5566\uff0c\u5199\u7684\u5f88\u8be6\u7ec6                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : starry97 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @GM \u6211\u770b\u6587\u6863\u91cc\u5b9a\u4e49\u7ed3\u679c\u76f8\u540c\u7684 pojo \u662f\u9700\u8981\u5c5e\u6027\u548c json \u5b57\u6bb5\u4e00\u81f4\u624d\u884c\uff0c\u4f46\u8fd9\u91cc\u7684 GroupName \u662f\u4e00\u76f4\u53d8\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : starry97 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @Jacky23333 \u597d\u7684\uff0c\u6211\u53bb\u627e\u627e\uff0c\u8c22\u8c22\u60a8\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : GM <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u76f4\u63a5\u7528 Jackson \u7684 JsonNode \u7b97\u4e86\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : lxk11153 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @starry97 “\u4f46\u8fd9\u91cc\u7684 GroupName \u662f\u4e00\u76f4\u53d8\u7684”\uff1f\u90a3\u5c31\u53cd\u5e8f\u5217\u5316\u5230 Map \u7c7b\u578b\u5440\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : Jacky23333 <\/span>  <\/div>\n
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                                                                 \u4f60\u8fd9\u4e2a json \u7684\u5c5e\u6027\u540d\u662f\u4e0d\u53ef\u4ee5\u53d8\u5316\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4 GroupName \u5e94\u8be5\u662f\u56fa\u5b9a\u7684\uff0c\u56e0\u4e3a\u4f60\u8bf4\u4e86\u4f60\u8981\u8f6c\u5316\u6210 javabean \u561b\uff0cjavabean \u5b57\u6bb5\u662f\u56fa\u5b9a\u7684\uff0c\u90a3 groupName \u80af\u5b9a\u4e5f\u8981\u662f\u56fa\u5b9a\u7684\u5440\uff0c\u4e0d\u8fc7\u6211\u770b\u4f60\u7684\u9700\u6c42(json \u7684\u5c5e\u6027\u540d\u662f\u4e0d\u56fa\u5b9a\u7684)\u90a3\u4f60\u4e0d\u5e94\u8be5\u8f6c\u5316\u6210 javabean\uff0c\u800c\u662f\u5e94\u8be5\u8f6c\u5316\u6210 Map\uff0c\u8fd9\u6837\u4f60\u901a\u8fc7 Map.keySet \u53bb\u904d\u5386\u6240\u6709\u5c5e\u6027\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : starry97 <\/span>  <\/div>\n
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                                                                 \u611f\u8c22\u5927\u5bb6\uff0c\u5df2\u7ecf\u89e3\u51b3\u4e86\uff0c\u8fd8\u662f\u6211\u592a\u83dc\u4e86\u3002
    \u89e3\u51b3\u65b9\u6cd5\uff1a
    gson.fromJson(jsonStr, new TypeToken<HashMap<String, HashMap<String, JsonBean>>>(){}.getType());                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : lxk11153 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 1. com.fasterxml.jackson.databind.ObjectMapper#readValue(String, TypeReference)
    —- new TypeReference<Map
    2. com.alibaba.fastjson.JSON#parseObject(String)                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : GM <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @starry97 \u641e\u90a3\u4e48\u590d\u6742\uff0cJackson \u591a\u597d\u7528
    ObjectMapper objectMapper = new ObjectMapper();
    JsonNode tree = objectMapper.readTree(jsonStr);<\/p>\n
    JsonNode node = tree.get(“GroupName1”).get(“name1”);
    String name = node.get(“name”).asText();
    int age = node.get(“age”).asInt();                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : hand515 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 Map<String,Map<String,User>><\/p>\n
    \u6709\u65f6\u5019\u633a\u53cd\u611f\u8fd9\u79cd Json \u5b9a\u4e49\u7684\uff0c\u9047\u5230\u4e86\u8fd8\u5f97\u591a\u5199\u4e0d\u5c11\u884c\u4ee3\u7801\uff0c\u7528\u6570\u7ec4\u4e0d\u597d\u5417                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : starry97 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @GM tree.get(“GroupName1”).get(“name1”); \u8fd9\u4e2a GroupName1 \u548c name1 \u662f\u4e00\u76f4\u53d8\u7684\uff0c\u53ef\u4ee5\u7528\u904d\u5386\u7684\u65b9\u6cd5\u5c06 tree \u4e00\u5c42\u4e00\u5c42\u904d\u5386\u51fa\u6765\u5417\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : starry97 <\/span>  <\/div>\n
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                                                                 @hand515 GroupName1 \u91cc\u7684 name \u662f\u4e00\u76f4\u53d8\u7684\uff0c\u4e0d\u597d\u7528\u6570\u7ec4\u8868\u793a\u5427                                                             <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : GM <\/span>  <\/div>\n
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                                                                 @starry97 \u53ef\u4ee5                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : EminemW <\/span>  <\/div>\n
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                                                                 \u4f60\u7684 json \u7ed3\u6784\u5e94\u8be5\u5f04\u6210\u8fd9\u6837\u3002\u6211\u89c9\u5f97\u4f60\u90a3\u6837\u4e0d\u592a\u5408\u9002
    {
     “Group”:[
     {
     “GroupName”:”name1″,
     “member”:[
     {
     “name”:”li”,
     “age”:22
     },
     {
     “name”:”zhang”,
     “age”:23
     }
     ]
     },
     {
     “GroupName”:”name2″,
     “member”:[
     {
     “name”:”li”,
     “age”:22
     },
     {
     “name”:”zhang”,
     “age”:23
      },
     {
     “name”:”wang”,
     “age”:22
     }
     ]
     }
     ]
    }                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : cco <\/span>  <\/div>\n
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                                                                 JSON \u8bbe\u8ba1\u4e5f\u662f\u4e00\u95e8\u827a\u672f- -\uff01 \u4f60\u8fd9\u3002\u3002\u3002\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : NotFoundEgg <\/span>  <\/div>\n
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                                                                 \u4e0d\u5efa\u8bae\u628a\u4e1a\u52a1\u53c2\u6570\u5f53\u6210 json \u7684 key 
    \u5077\u61d2\u4e00\u65f6\u723d \u52a0\u53c2\u706b\u846c\u573a                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    \u5728 Java \u4e2d\u4ee5\u4e0b json \u5b57…<\/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\/137260"}],"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=137260"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/137260\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=137260"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=137260"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=137260"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}