从Gson的文档中：
Gson为枚举提供了默认的序列化和反序列化…如果您想更改默认的表示形式，则可以通过GsonBuilder.registerTypeAdapter（Type，Object）注册类型适配器来实现。
以下是一种这样的方法。
import java.io.FileReader;import java.lang.reflect.Type;import java.util.List;import com.google.gson.Gson;import com.google.gson.GsonBuilder;import com.google.gson.JsonDeserializationContext;import com.google.gson.JsonDeserializer;import com.google.gson.JsonElement;import com.google.gson.JsonParseException;public class GsonFoo{ public static void main(String[] args) throws Exception { GsonBuilder gsonBuilder = new GsonBuilder(); gsonBuilder.registerTypeAdapter(AttributeScope.class, new AttributeScopeDeserializer()); Gson gson = gsonBuilder.create(); TruncateElement element = gson.fromJson(new FileReader("input.json"), TruncateElement.class); System.out.println(element.lower); System.out.println(element.upper); System.out.println(element.delimiter); System.out.println(element.scope.get(0)); }}class AttributeScopeDeserializer implements JsonDeserializer<AttributeScope>{ @Override public AttributeScope deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { AttributeScope[] scopes = AttributeScope.values(); for (AttributeScope scope : scopes) { if (scope.scope.equals(json.getAsString())) return scope; } return null; }}class TruncateElement{ int lower; int upper; String delimiter; List<AttributeScope> scope;}enum AttributeScope{ TITLE("${title}"), DEscriptION("${description}"); String scope; AttributeScope(String scope) { this.scope = scope; }}
