从 jackson 中的 objectnode 中删除所有元素

Question

我有以下对象节点：

{
   "type": "FeatureCollection",
   "features": [
        {"type":"Feature",
         "properties":{
              "pro1":"value1",
              "pro2":"value2" 
         },
         "geometry":{
              "type":"Polygon",
              "coordinates":[[[3.22998,48.312428],[3.22998,48.719961],[3.405762,48.719961],[3.405762,48.312428],[3.22998,48.312428]]]
           }
         }  
      ]
}

基本上我想从属性中删除所有元素并得到类似的东西：

"properties":{}

我试过使用以下内容，但它删除了所有内容：

bufferPolygon.setObject(((ObjectNode)bufferIteration).with("properties").removeAll().toString());

Answer 1

Basically I want to remove all the elements from properties and get something like:
"properties":{}

以下应该会给您想要的结果：

JsonNode tree = mapper.readTree(json);
for (JsonNode feature : tree.get("features")) {
    ((ObjectNode) feature).set("properties", mapper.createObjectNode());
}

String updatedJson = mapper.writeValueAsString(tree);

从 jackson 中的 objectnode 中删除所有元素

Remove all elements from objectnode in jackson

java

json

jackson-databind