Gson 转换 Localdate 使用 GsonBuilder setDateFormat 无效

setDateFormat(String pattern)方法
决定序列化和反序列化 java.util.Date，java.sql.Timestamp，java.sql.Timestamp的格式

并不支持localdata 所以需要手写一个 适配器来完成

private Gson gson = new GsonBuilder()
            .setDateFormat("yyyy-MM-dd")
            .registerTypeAdapter(LocalDate.class,new LocalDataTypeAdapter())
            .create();

package com.chinagoods.personnel.config;

import com.google.gson.*;

import java.lang.reflect.Type;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.format.DateTimeFormatter;

/**
 * @Author: {---chenzhichao---}
 * @Date: 2020/6/2 20:04
 */
public class LocalDataTypeAdapter implements JsonSerializer<LocalDate>, JsonDeserializer<LocalDate> {
    private final DateFormat format = new SimpleDateFormat("yyyy-MM-dd");
    @Override
    public LocalDate deserialize(JsonElement jsonElement, Type type, JsonDeserializationContext jsonDeserializationContext) throws JsonParseException {
        if (!(jsonElement instanceof JsonPrimitive)){
            throw new JsonParseException("The date should be a string value");
        }
        return null;
    }

    @Override
    public JsonElement serialize(LocalDate localDate, Type type, JsonSerializationContext jsonSerializationContext) {
        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
        String createTime = dateTimeFormatter.format(localDate);
        return new JsonPrimitive(createTime);
    }
}