json解析2 - 复杂json解析

电玩女神 2022-12-10 15:00 381阅读 0赞

导入fastjson依赖的jar包

  1. <dependency>
  2.       <groupId>com.alibaba</groupId>
  3.       <artifactId>fastjson</artifactId>
  4.       <version>1.2.60</version>
  5.  </dependency>

先看看数据结构：

watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpZ3VhbmdfODIw_size_16_color_FFFFFF_t_70

对应json字符串： 

  1. {
  2.     "item":[
  3.         {
  4.             "media_id":"DjkC7IK8dPuF6LkHXdpM7bGRF_ae0dk0ZG_0XIi-rvo",
  5.             "content":{
  6.                 "news_item":[
  7.                     {
  8.                         "title":"1",
  9.                         "author":"欧阳宇",
  10.                         "digest":"1",
  11.                         "content":"neirong",
  12.                         "content_source_url":"http://ouyangyu.com",
  13.                         "thumb_media_id":"DjkC7IK8dPuF6LkHXdpM7S6ApFtUuIYUXJ9bgr4KTuA",
  14.                         "show_cover_pic":0,
  15.                         "url":"url",
  16.                         "thumb_url":"url",
  17.                         "need_open_comment":1,
  18.                         "only_fans_can_comment":0
  19.                     },
  20.                     {
  21.                         "title":"1",
  22.                         "author":"欧阳宇",
  23.                         "digest":"1",
  24.                         "content":"neirong",
  25.                         "content_source_url":"http://ouyangyu.com",
  26.                         "thumb_media_id":"DjkC7IK8dPuF6LkHXdpM7S6ApFtUuIYUXJ9bgr4KTuA",
  27.                         "show_cover_pic":0,
  28.                         "url":"url",
  29.                         "thumb_url":"url",
  30.                         "need_open_comment":1,
  31.                         "only_fans_can_comment":0
  32.                     }
  33.                 ],
  34.                 "create_time":1526465140,
  35.                 "update_time":1526465513
  36.             },
  37.             "update_time":1526465513
  38.         },
  39.         {
  40.             "media_id":"DjkC7IK8dPuF6LkHXdpM7T_W4zTBQZtLsxEzFW1c2iE",
  41.             "content":{
  42.                 "news_item":[
  43.                     {
  44.                         "title":"1",
  45.                         "author":"欧阳宇",
  46.                         "digest":"1",
  47.                         "content":"neirong",
  48.                         "content_source_url":"http://ouyangyu.com",
  49.                         "thumb_media_id":"DjkC7IK8dPuF6LkHXdpM7S6ApFtUuIYUXJ9bgr4KTuA",
  50.                         "show_cover_pic":0,
  51.                         "url":"url",
  52.                         "thumb_url":"url",
  53.                         "need_open_comment":1,
  54.                         "only_fans_can_comment":0
  55.                     }
  56.                 ],
  57.                 "create_time":1526465140,
  58.                 "update_time":1526465513
  59.             },
  60.             "update_time":1526465513
  61.         }
  62.     ],
  63.     "total_count":4,
  64.     "item_count":4
  65. }

解析代码：

  1. import com.alibaba.fastjson.JSON;
  2. import com.alibaba.fastjson.JSONArray;
  3. import com.alibaba.fastjson.JSONObject;
  5. public class Test3 {
  6.     public static void main(String[] args) throws Exception {
  8.         String jsonStr = "{\"item\":[" +
  9.                  "{\"media_id\":\"DjkC7IK8dPuF6LkHXdpM7bGRF_ae0dk0ZG_0XIi-rvo\","+
  10.                  "\"content\":{\"news_item\":["+
  11.                                  "{\"title\":\"1\",\"author\":\"欧阳宇\",\"digest\":\"1\","+
  12.                                       "\"content\":\"neirong\","+
  13.                                       "\"content_source_url\":\"http://ouyangyu.com\","+
  14.                                       "\"thumb_media_id\":\"DjkC7IK8dPuF6LkHXdpM7S6ApFtUuIYUXJ9bgr4KTuA\","+
  15.                                       "\"show_cover_pic\":0,"+
  16.                                       "\"url\":\"url\","+
  17.                                       "\"thumb_url\":\"url\","+
  18.                                       "\"need_open_comment\":1,"+
  19.                                       "\"only_fans_can_comment\":0"+
  20.                                   "},"+
  22.                                  "{\"title\":\"1\",\"author\":\"欧阳宇\",\"digest\":\"1\","+
  23.                                   "\"content\":\"neirong\","+
  24.                                   "\"content_source_url\":\"http://ouyangyu.com\","+
  25.                                   "\"thumb_media_id\":\"DjkC7IK8dPuF6LkHXdpM7S6ApFtUuIYUXJ9bgr4KTuA\","+
  26.                                   "\"show_cover_pic\":0,"+
  27.                                   "\"url\":\"url\","+
  28.                                   "\"thumb_url\":\"url\","+
  29.                                   "\"need_open_comment\":1,"+
  30.                                   "\"only_fans_can_comment\":0"+
  31.                               "}"+
  32.                              "],"+
  33.                          "\"create_time\":1526465140,"+
  34.                          "\"update_time\":1526465513"+
  35.                          "},"+
  36.                      "\"update_time\":1526465513"+
  37.                  "},"+
  39.                  "{\"media_id\":\"DjkC7IK8dPuF6LkHXdpM7T_W4zTBQZtLsxEzFW1c2iE\","+
  40.                  "\"content\":{\"news_item\":["+
  41.                      "{\"title\":\"1\",\"author\":\"欧阳宇\",\"digest\":\"1\","+
  42.                      "\"content\":\"neirong\","+
  43.                      "\"content_source_url\":\"http://ouyangyu.com\","+
  44.                      "\"thumb_media_id\":\"DjkC7IK8dPuF6LkHXdpM7S6ApFtUuIYUXJ9bgr4KTuA\","+
  45.                      "\"show_cover_pic\":0,"+
  46.                      "\"url\":\"url\","+
  47.                      "\"thumb_url\":\"url\","+
  48.                      "\"need_open_comment\":1,"+
  49.                      "\"only_fans_can_comment\":0"+
  50.                  "}"+
  51.                  "],"+
  52.                      "\"create_time\":1526465140,"+
  53.                      "\"update_time\":1526465513"+
  54.                       "},"+
  55.                      "\"update_time\":1526465513"+
  56.                      "}"+
  57.                      "],"+
  58.              "\"total_count\":4," +    
  59.              "\"item_count\":4"+
  60.              "}";
  63.         String jsonStr2 = "{\"list\":["+
  64.                                    "{\"ref_date\":\"2018-05-16\",\"user_source\":0,\"msgid\":\"2455330874_1\",\"title\":\"fdsa\","+
  65.                                     "\"int_page_read_user\":1,\"int_page_read_count\":1,\"ori_page_read_user\":0,\"ori_page_read_count\":0,"+
  66.                                     "\"share_user\":0,\"share_count\":0,\"add_to_fav_user\":0,\"add_to_fav_count\":0},"+
  68.                                 "{\"ref_date\":\"2018-05-16\",\"user_source\":0,\"msgid\":\"2455330883_1\",\"title\":\"1\","+
  69.                                     "\"int_page_read_user\":1,\"int_page_read_count\":2,\"ori_page_read_user\":1,\"ori_page_read_count\":1,"+
  70.                                     "\"share_user\":0,\"share_count\":0,\"add_to_fav_user\":0,\"add_to_fav_count\":0},"+
  72.                                 "{\"ref_date\":\"2018-05-16\",\"user_source\":0,\"msgid\":\"2455330883_2\",\"title\":\"2\","+
  73.                                     "\"int_page_read_user\":1,\"int_page_read_count\":1,\"ori_page_read_user\":1,\"ori_page_read_count\":1,"+
  74.                                     "\"share_user\":0,\"share_count\":0,\"add_to_fav_user\":0,\"add_to_fav_count\":0},"+
  76.                                 "{\"ref_date\":\"2018-05-16\",\"user_source\":0,\"msgid\":\"2455330883_3\",\"title\":\"3\",\"int_page_read_user\":1,\"int_page_read_count\":1,\"ori_page_read_user\":0,\"ori_page_read_count\":0,\"share_user\":0,\"share_count\":0,\"add_to_fav_user\":0,\"add_to_fav_count\":0},"+
  77.                                 "{\"ref_date\":\"2018-05-16\",\"user_source\":0,\"msgid\":\"2455330883_4\",\"title\":\"4\",\"int_page_read_user\":1,\"int_page_read_count\":1,\"ori_page_read_user\":0,\"ori_page_read_count\":0,\"share_user\":0,\"share_count\":0,\"add_to_fav_user\":0,\"add_to_fav_count\":0},"+
  78.                                 "{\"ref_date\":\"2018-05-16\",\"user_source\":0,\"msgid\":\"2455330883_5\",\"title\":\"5\",\"int_page_read_user\":1,\"int_page_read_count\":1,\"ori_page_read_user\":0,\"ori_page_read_count\":0,\"share_user\":0,\"share_count\":0,\"add_to_fav_user\":0,\"add_to_fav_count\":0}"+
  79.                                 "]"+
  80.                             "}";
  82.         //原json字符串
  83.         System.out.println("原json字符串");
  84.         System.out.println("jsonStr:"+jsonStr);
  85.         //1.第一层解析
  86.         JSONObject map1 = JSON.parseObject(jsonStr);
  87.         JSONArray item = map1.getJSONArray("item");
  88.         Integer total_count = (Integer)map1.get("total_count");
  89.         Integer item_count = (Integer)map1.get("item_count");
  90.         System.out.println("第一层解析");
  91.         System.out.println("item:"+item.toJSONString());
  92.         System.out.println("total_count:"+total_count);
  93.         System.out.println("item_count:"+item_count);
  95.         //2.第二层解析
  96.         for(int i=0;i<item.size();i++){
  97.             JSONObject map2 = item.getJSONObject(i);
  98.             Integer update_time = (Integer) map2.get("update_time");
  99.             JSONObject content = map2.getJSONObject("content");
  100.             JSONArray news_item = content.getJSONArray("news_item");
  101.             Integer create_time = (Integer) content.get("create_time");
  102.             Integer update_time2 = (Integer) content.get("update_time");
  103.             System.out.println("第二层解析");
  104.             System.out.println("content:"+content.toJSONString());
  105.             System.out.println("create_time:"+create_time);
  106.             System.out.println("update_time2:"+update_time2);
  108.             //3.第三层解析
  109.             for(int j=0;j<news_item.size();j++){
  110.                 JSONObject map3 = news_item.getJSONObject(j);
  111.                 String title = (String) map3.get("title");
  112.                 String author = (String) map3.get("author");
  113.                 String content_source_url = (String) map3.get("content_source_url");
  114.                 Integer need_open_comment = (Integer) map3.get("need_open_comment");
  115.                 System.out.println("第三层解析");
  116.                 System.out.println("title:"+title);
  117.                 System.out.println("author:"+author);
  118.                 System.out.println("content_source_url:"+content_source_url);
  119.                 System.out.println("need_open_comment:"+need_open_comment);
  120.             }
  121.         }
  123.     }
  125. }

结果：大致如图

watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpZ3VhbmdfODIw_size_16_color_FFFFFF_t_70 1

结论：主要使用两个对象的方法

  1. JSONObject map1 = JSON.parseObject(jsonStr); //map对象
  2. JSONArray item = map1.getJSONArray("item");    //数组对象

注意：map获值的类型：字符串或者基本数据类型，注意数据类型
watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpZ3VhbmdfODIw_size_16_color_FFFFFF_t_70 2

watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3lpZ3VhbmdfODIw_size_16_color_FFFFFF_t_70 3

方法2：gons解析

  1. Gson g1=new Gson();
  2.        Map m3 = g1.fromJson(jsonStr, HashMap.class);
  3.        System.out.println(m3.toString());
  4.        System.out.println(m3.get("item_count"));
  5.        System.out.println(m3.get("item"));
  6.        ArrayList l1=(ArrayList) m3.get("item");
  7.        for(int i=0;i<l1.size();i++){
  8.            Map m4 = (Map)l1.get(i);
  9.            System.out.println("update_time:"+m4.get("update_time"));
  10.        }

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