package com.java2nb.common.jsonserializer; import com.fasterxml.jackson.core.JsonGenerator; import com.fasterxml.jackson.databind.JsonSerializer; import com.fasterxml.jackson.databind.SerializerProvider; import java.io.IOException; public class LongToStringSerializer extends JsonSerializer { @Override public void serialize(Long value, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException { if(value != null){ jsonGenerator.writeString(value+""); }else{ jsonGenerator.writeNull(); } } }