使用Python将两个JSON合并为一个

时间：2018-07-24 05:25:11

标签： python json

我有两个JSON，我想合并为一个。

JSON 1 

[ 
   { 
      "city":"Aberdeen",
      "year":1996,
      "occupancy_change":null,
      "effective_rent_change":null
   },
   { 
      "city":"Aberdeen",
      "year":1997,
      "occupancy_change":null,
      "effective_rent_change":null
   },
   { 
      "city":"Ambler",
      "year":1996,
      "occupancy_change":1.65,
      "effective_rent_change":4.37
   },
   { 
      "city":"Ambler",
      "year":1997,
      "occupancy_change":1.17,
      "effective_rent_change":-0.25
   }
]

JSON 2 

[ 
   { 
      "year":1996,
      "pma_occupancy_change":null,
      "pma_effective_rent_change":null
   },
   { 
      "year":1997,
      "pma_occupancy_change":null,
      "pma_effective_rent_change":null
   }
]

我想将两个json合并为一个，我想使用以下格式。 

[ 
   { 
      "year":1996,
      "pma_occupancy_change":null,
      "pma_effective_rent_change":null,
      "city":"Aberdeen",
      "occupancy_change":null,
      "effective_rent_change":null,
      "city":"Ambler",
      "occupancy_change":1.65,
      "effective_rent_change":4.37
   },
   { 
      "year":1997,
      "pma_occupancy_change":null,
      "pma_effective_rent_change":null,
      "city":"Aberdeen",
      "occupancy_change":null,
      "effective_rent_change":null
      "city":"Ambler",
      "occupancy_change":1.17,
      "effective_rent_change":-0.25
   }
]

到目前为止，这是我尝试过的方法，但对我而言无效。

from collections import defaultdict

null = None    
d = defaultdict(dict)

for l in (city_li, pma_li):
   for elem in l:
       d[elem['year']].update(elem)

l3 = d.values()
print l3

3 个答案:

答案 0 :(得分：0)

    public void concat2JSONStrings() {
            String JSONString1 = "[ \r\n" + 
                    "   { \r\n" + 
                    "      \"city\":\"Aberdeen\",\r\n" + 
                    "      \"year\":1996,\r\n" + 
                    "      \"occupancy_change\":null,\r\n" + 
                    "      \"effective_rent_change\":null\r\n" + 
                    "   },\r\n" + 
                    "   { \r\n" + 
                    "      \"city\":\"Aberdeen\",\r\n" + 
                    "      \"year\":1997,\r\n" + 
                    "      \"occupancy_change\":null,\r\n" + 
                    "      \"effective_rent_change\":null\r\n" + 
                    "   },\r\n" + 
                    "   { \r\n" + 
                    "      \"city\":\"Ambler\",\r\n" + 
                    "      \"year\":1996,\r\n" + 
                    "      \"occupancy_change\":1.65,\r\n" + 
                    "      \"effective_rent_change\":4.37\r\n" + 
                    "   },\r\n" + 
                    "   { \r\n" + 
                    "      \"city\":\"Ambler\",\r\n" + 
                    "      \"year\":1997,\r\n" + 
                    "      \"occupancy_change\":1.17,\r\n" + 
                    "      \"effective_rent_change\":-0.25\r\n" + 
                    "   }\r\n" + 
                    "]";

            String JSONString2 = "[ \r\n" + 
                    "   { \r\n" + 
                    "      \"year\":1996,\r\n" + 
                    "      \"pma_occupancy_change\":null,\r\n" + 
                    "      \"pma_effective_rent_change\":null\r\n" + 
                    "   },\r\n" + 
                    "   { \r\n" + 
                    "      \"year\":1997,\r\n" + 
                    "      \"pma_occupancy_change\":null,\r\n" + 
                    "      \"pma_effective_rent_change\":null\r\n" + 
                    "   }\r\n" + 
                    "]";

            JsonPath jp = new JsonPath(JSONString1);
            JsonPath jp1 = new JsonPath(JSONString2);
            System.out.println(jp.get("city[0]").toString());
            System.out.println(jp1.get("year[0]").toString());

            JSONObject json = new JSONObject();
            json.put("year", jp.get("city[0]"));
            json.put("pma_occupancy_change", jp1.get("pma_occupancy_change[0]"));


Once you have the JSONObject then you can convert to JSONArray and meet your output.

答案 1 :(得分：0)

使用简单JSON的Java解决方案：

        @Test
        public void concat2JSONStrings() {
            String JSONString1 = "[ \r\n" + 
                    "   { \r\n" + 
                    "      \"city\":\"Aberdeen\",\r\n" + 
                    "      \"year\":1996,\r\n" + 
                    "      \"occupancy_change\":null,\r\n" + 
                    "      \"effective_rent_change\":null\r\n" + 
                    "   },\r\n" + 
                    "   { \r\n" + 
                    "      \"city\":\"Aberdeen\",\r\n" + 
                    "      \"year\":1997,\r\n" + 
                    "      \"occupancy_change\":null,\r\n" + 
                    "      \"effective_rent_change\":null\r\n" + 
                    "   },\r\n" + 
                    "   { \r\n" + 
                    "      \"city\":\"Ambler\",\r\n" + 
                    "      \"year\":1996,\r\n" + 
                    "      \"occupancy_change\":1.65,\r\n" + 
                    "      \"effective_rent_change\":4.37\r\n" + 
                    "   },\r\n" + 
                    "   { \r\n" + 
                    "      \"city\":\"Ambler\",\r\n" + 
                    "      \"year\":1997,\r\n" + 
                    "      \"occupancy_change\":1.17,\r\n" + 
                    "      \"effective_rent_change\":-0.25\r\n" + 
                    "   }\r\n" + 
                    "]";

            String JSONString2 = "[ \r\n" + 
                    "   { \r\n" + 
                    "      \"year\":1996,\r\n" + 
                    "      \"pma_occupancy_change\":null,\r\n" + 
                    "      \"pma_effective_rent_change\":null\r\n" + 
                    "   },\r\n" + 
                    "   { \r\n" + 
                    "      \"year\":1997,\r\n" + 
                    "      \"pma_occupancy_change\":null,\r\n" + 
                    "      \"pma_effective_rent_change\":null\r\n" + 
                    "   }\r\n" + 
                    "]";

            JsonPath jp = new JsonPath(JSONString1);
            JsonPath jp1 = new JsonPath(JSONString2);

            JSONObject json = new JSONObject();
            json.put("year", jp.get("city[0]"));
            json.put("pma_occupancy_change", jp1.get("pma_occupancy_change[0]"));
            json.put("pma_effective_rent_change", jp1.get("pma_effective_rent_change[0]"));
            json.put("city",jp.get("city[0]"));
            json.put("occupancy_change",jp.get("occupancy_change[0]"));
            json.put("effective_rent_change",jp.get("effective_rent_change[0]"));
            json.put("city",jp.get("city[2]"));
            json.put("occupancy_change",jp.get("occupancy_change[2]"));
            json.put("effective_rent_change",jp.get("effective_rent_change[2]"));

            JSONObject json1 = new JSONObject();
            json1.put("year", jp.get("city[2]"));
            json1.put("pma_occupancy_change", jp1.get("pma_occupancy_change[0]"));
            json1.put("pma_effective_rent_change", jp1.get("pma_effective_rent_change[0]"));
            json1.put("city",jp.get("city[0]"));
            json1.put("occupancy_change",jp.get("occupancy_change[0]"));
            json1.put("effective_rent_change",jp.get("effective_rent_change[0]"));
            json1.put("city",jp.get("city[2]"));
            json1.put("occupancy_change",jp.get("occupancy_change[3]"));
            json1.put("effective_rent_change",jp.get("effective_rent_change[3]"));

            JSONArray ja1 = new JSONArray();
            ja1.add(json);
            ja1.add(json1);
            System.out.println("Required appended JSON Output is: "+ja1.toJSONString());





        }

所需的输出：

必需的附加JSON输出为：

  

[{“ effective_rent_change”：4.37，“ year”：“ Aberdeen”，“ city”：“ Ambler”，“ pma_effective_rent_change”：null，“ pma_occupancy_change”：null，“ occupancy_change”：1.65}，{“ effective_rent_change” ：-0.25，“ year”：“ Ambler”，“ city”：“ Ambler”，“ pma_effective_rent_change”：null，“ pma_occupancy_change”：null，“ occupancy_change”：1.17}]

答案 2 :(得分：-2)

合并两个字符串。

@Test
    public void concat2JSONStrings() {
        String JSONString1 = "\"[ \r\n" + 
                "   { \r\n" + 
                "      \\\"city\\\":\\\"Aberdeen\\\",\r\n" + 
                "      \\\"year\\\":1996,\r\n" + 
                "      \\\"occupancy_change\\\":null,\r\n" + 
                "      \\\"effective_rent_change\\\":null\r\n" + 
                "   },\r\n" + 
                "   { \r\n" + 
                "      \\\"city\\\":\\\"Aberdeen\\\",\r\n" + 
                "      \\\"year\\\":1997,\r\n" + 
                "      \\\"occupancy_change\\\":null,\r\n" + 
                "      \\\"effective_rent_change\\\":null\r\n" + 
                "   },\r\n" + 
                "   { \r\n" + 
                "      \\\"city\\\":\\\"Ambler\\\",\r\n" + 
                "      \\\"year\\\":1996,\r\n" + 
                "      \\\"occupancy_change\\\":1.65,\r\n" + 
                "      \\\"effective_rent_change\\\":4.37\r\n" + 
                "   },\r\n" + 
                "   { \r\n" + 
                "      \\\"city\\\":\\\"Ambler\\\",\r\n" + 
                "      \\\"year\\\":1997,\r\n" + 
                "      \\\"occupancy_change\\\":1.17,\r\n" + 
                "      \\\"effective_rent_change\\\":-0.25\r\n" + 
                "   }\r\n" + 
                "]\""; 

        String JSONString2 = "\"[ \r\n" + 
                "   { \r\n" + 
                "      \\\"year\\\":1996,\r\n" + 
                "      \\\"pma_occupancy_change\\\":null,\r\n" + 
                "      \\\"pma_effective_rent_change\\\":null\r\n" + 
                "   },\r\n" + 
                "   { \r\n" + 
                "      \\\"year\\\":1997,\r\n" + 
                "      \\\"pma_occupancy_change\\\":null,\r\n" + 
                "      \\\"pma_effective_rent_change\\\":null\r\n" + 
                "   }\r\n" + 
                "]\"";

        System.out.println(JSONString1.concat(JSONString2));

    }

输出：

"[ 
   { 
      \"city\":\"Aberdeen\",
      \"year\":1996,
      \"occupancy_change\":null,
      \"effective_rent_change\":null
   },
   { 
      \"city\":\"Aberdeen\",
      \"year\":1997,
      \"occupancy_change\":null,
      \"effective_rent_change\":null
   },
   { 
      \"city\":\"Ambler\",
      \"year\":1996,
      \"occupancy_change\":1.65,
      \"effective_rent_change\":4.37
   },
   { 
      \"city\":\"Ambler\",
      \"year\":1997,
      \"occupancy_change\":1.17,
      \"effective_rent_change\":-0.25
   }
]""[ 
   { 
      \"year\":1996,
      \"pma_occupancy_change\":null,
      \"pma_effective_rent_change\":null
   },
   { 
      \"year\":1997,
      \"pma_occupancy_change\":null,
      \"pma_effective_rent_change\":null
   }
]"
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