[英]Merge JSON Tree Jackson
I want to merge two JSON trees with jackson.我想将两个 JSON 树与 jackson 合并。
JSONTree1: JSONTree1:
{"test":{"test1":"test1"}}
JSONTree2: JSONTree2:
{"test":{"test2":"test2"}}
Output:输出:
{"test":{"test1":"test1", "test2":"test2"}}
Is there an easy method in jackson which does this?杰克逊有一个简单的方法可以做到这一点吗? I cant find one.
我找不到一个。 Thanks for your help.
谢谢你的帮助。
You can achieve it with jackson as below,你可以用杰克逊实现它,如下所示,
ObjectMapper mapper = new ObjectMapper();
Map<String, Object> json1 = mapper.readValue("{\"test\":{\"test1\":\"test1\"}}", Map.class);
Map<String, Object> json2 = mapper.readValue("{\"test\":{\"test2\":\"test2\"}}", Map.class);
Map result = new HashMap<>();
json1.forEach((k,v)->json2.merge(k, v, (v1, v2)->
{
Map map = new HashMap<>();
map.putAll((Map) v1);
map.putAll((Map) v2);
result.put(k, map);
return v2;
} ));
String resultJson = new ObjectMapper().writeValueAsString(result);
System.out.println(resultJson);
Result:结果:
{"test":{"test1":"test1","test2":"test2"}}
{"test":{"test1":"test1","test2":"test2"}}
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