我使用Genson将Java类序列化为JSON。其中一个类成员是Map,我需要将其直接序列化为名称/值对。例如:
{
"name":"Myname",
"Book": "My book title",
"Fruit": "Orange"
}
我需要序列化:
{
"name":"Myname",
"mp":{
"Book": "My book title",
"Fruit": "Orange"
}
}
我尝试应用Genson,我接近其默认操作,输出为:
install
保证mp中的键不会与Demo的任何成员发生冲突。
如何使用Genson实现此用例?
答案 0 :(得分:2)
可以通过实现自定义Converter
来实现此输出。
例如:
import com.owlike.genson.Context;
import com.owlike.genson.Converter;
import com.owlike.genson.stream.ObjectReader;
import com.owlike.genson.stream.ObjectWriter;
public class DemoConverter implements Converter<Demo> {
@Override
public void serialize(Demo demo, ObjectWriter objectWriter, Context context) {
objectWriter.beginObject();
objectWriter.writeString("name", demo.getName());
demo.getMp().forEach((prop, value) ->
objectWriter.writeString(prop, value)
);
objectWriter.endObject();
}
@Override
public Demo deserialize(ObjectReader objectReader, Context context) throws Exception {
// TODO
}
}
现在,Genson
应该被实例化并与此转换器一起使用:
Genson genson = new GensonBuilder().withConverters(new DemoConverter()).create();
String json = genson.serialize(demo);
// and the JSON is
{"name":"MyName","Fruit":"Orange","Book":"My book title"}