Replace a key in GSON | 易学教程

问题

I'm new to GSON. I have a JSON object (As a String) -

{
"name" : "myName",
"city" : "myCity"
}

I parsed this as follows -

JsonParser parser = new JsonParser();
JsonObject json_result = (JsonObject)parser.parse(#TheAboveMentionedStringGoesHere);

Now I want to replace the key name with something else ,say, firstName so that the resulting JSON object is -

{
"firstName" : "myName",
"city" : "myCity"
}

Is this possible? How do I achieve this?

回答1:

If you use com.google.code.gson:gson:2.+ Google GSON third party library, and then according to it's documentations, you can use @SerializedName("commits_url")in the model class or POJO. So your model class might be like below :

public class Example {

    @SerializedName("first_name")
    String name;

    @SerializedName("city")
    String city;
}

and also when you want use it as :

Gist gist = new Gson().fromJson("{
"firstName" : "myName",
"city" : "myCity"
}", Gist.class);

at last if you think you need to use customized Serialiazer and Deserializer, please read this documention.
I hope this helps you.

回答2:

you can do this : first add then remove

json_result.add("firstName", json_result.get("name"));

        json_result.remove("name");

回答3:

JsonParser parser = new JsonParser();
JsonObject json_result = (JsonObject)parser.parse(#TheAboveMentionedStringGoesHere);

have another similar object with a constructor that takes JsonObject as its parameter, but has firstname as its field name.

public class json2{
    String firstname;
    String city;
    public json2(JsonObject){
        this.firstname=JsonObject.name;
        this.city=JsonObject.city;
    }

}

json2 j = new json2(JsonObject);
String jsonString = Gson.toJson(j);

You will get what you want

回答4:

The following function will search through an object and all of its child objects/arrays, and replace the key with the new value. It will apply globally, so it won't stop after the first replacement

function findAndReplace(object, value, replacevalue){
  for(var x in object){
 if(typeof object[x] == 'object'){
  findAndReplace(object[x], value, replacevalue);
 }
 if(object[x] == value){
  object["name"] = replacevalue;
  // break; 
 }
}
}

Please check the Below Link

来源：https://stackoverflow.com/questions/29469788/replace-a-key-in-gson

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json

gson