Custom enumeration gson conversion
This article introduces the relevant knowledge of "the conversion of custom enumeration gson". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!
CodedTypeTypeAdapterimport com.google.gson.*;import com.utils.mybatis.CodedEnum;import java.lang.reflect.Type / * * CodedEnum conversion rules in GSON, using code instead of the characters * * @ param * @ author tenmao * / public class CodedTypeTypeAdapter implements JsonSerializer, JsonDeserializer {@ Override public E deserialize (JsonElement jsonElement, Type type, JsonDeserializationContext jsonDeserializationContext) throws JsonParseException {if (type instanceof Class) {@ SuppressWarnings ("unchecked") Class klass = (Class) type; return CodedEnum.codeOf (klass, jsonElement.getAsInt ()) .orElse (null) } else {throw new RuntimeException (String.format ("json% s cannot convert to type s", jsonElement, type));} @ Override public JsonElement serialize (E, Type type, JsonSerializationContext jsonSerializationContext) {return new JsonPrimitive (e.getCode ());}} HttpMessageConverterimport com.google.gson.GsonBuilder;import com.tenmao.utils.mybatis.CodedEnum;import com.tenmao.utils.mybatis.converter.CodedTypeTypeAdapter;import lombok.extern.slf4j.Slf4j Import org.reflections.Reflections;import org.reflections.scanners.SubTypesScanner;import org.springframework.http.converter.json.GsonHttpMessageConverter;import java.util.Set;/** * @ author tenmao * @ since 2017-12-1 * / @ Slf4jpublic class HttpMessageConverter extends GsonHttpMessageConverter {public HttpMessageConverter () {final GsonBuilder builder = new GsonBuilder (); final Reflections reflections = new Reflections ("com.tenmao", new SubTypesScanner (true)) Final Set allClasses = reflections.getStore (). GetSubTypesOf (CodedEnum.class.getName ()); for (String klass: allClasses) {try {final Class aClass = Class.forName (klass); builder.registerTypeAdapter (aClass, new CodedTypeTypeAdapter ());} catch (ClassNotFoundException e) {log.error ("fail to register for gson", e) }} setGson (builder.create ());}} spring-mvc.xml complete
After implementing the above steps, as long as you implement the custom enumeration of interface CodedEnum, you can automatically convert to its code value.
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