Gson转换错误之输出整形数据变成浮点型数据

在项目开发中，数据库本是整形数据，在经过Gson转换后，输出变成浮点型数据，如输出本为age:1，变为age:1.0，所以要重写Gson的类型转换器。

import com.google.gson.Gson;
import com.google.gson.TypeAdapter;
import com.google.gson.TypeAdapterFactory;
import com.google.gson.internal.LinkedTreeMap;
import com.google.gson.reflect.TypeToken;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class DataTypeAdaptor extends TypeAdapter {
  public static final TypeAdapterFactory FACTORY = new TypeAdapterFactory() {
    @SuppressWarnings("unchecked")
    @Override
    public  TypeAdapter create(Gson gson, TypeToken type) {
      if (type.getRawType() == ServiceListResult.class) {
        return (TypeAdapter) new DataTypeAdaptor(gson);
      }
      return null;
    }
  };

  private final Gson gson;

  DataTypeAdaptor(Gson gson) {
    this.gson = gson;
  }

  @Override
  public void write(JsonWriter out, ServiceListResult value) throws IOException {
    if (value == null) {
      out.nullValue();
      return;
    }

    out.beginObject();//开始接受
    out.name("ReturnCode");//你需要用Gson转换的实体类里的属性
    gson.getAdapter(Integer.class).write(out, value.ReturnCode);
    out.name("Message");//你需要用Gson转换的实体类里的属性
    gson.getAdapter(String.class).write(out, value.Message);
    out.name("Data");//你需要用Gson转换的实体类里的属性
    gson.getAdapter(Object.class).write(out,value.Data);
    out.endObject();
  }

  @Override
  public ServiceListResult read(JsonReader in) throws IOException {
    ServiceListResult data = new ServiceListResult();
    Map dataMap = (Map) readInternal(in);
    data.ReturnCode=((Integer)dataMap.get("ReturnCode"));
    data.Message= (String) dataMap.get("Message");
    data.Data=dataMap.get("Data");
    return data;
  }


  private Object readInternal(JsonReader in) throws IOException {
    JsonToken token = in.peek();
    switch (token) {
      case BEGIN_ARRAY:
        List