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hotkits项目集合中的一员，JSON适配器组件，让切换JSON解析框架只需要切换依赖包即可。

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package com.wujiuye.hotkit.json.jackson;

import com.fasterxml.jackson.databind.ObjectMapper;

import java.util.HashSet;
import java.util.Set;

/**
 * @author wujiuye 2020/09/09
 */
public class ObjectMapperSub extends ObjectMapper {

    private Set> strategys = new HashSet<>();

    public void putStrategy(final Class cla, JacksonExclusionStrategy strategy) {
        if (strategys.contains(cla)) {
            return;
        }
        synchronized (this) {
            if (strategys.contains(cla)) {
                return;
            }
            Set> newSet = new HashSet<>();
            newSet.add(cla);
            strategys = newSet;
            this.setFilterProvider(strategy);
            // 将@JsonFilter 作用于 java 对象上
            this.addMixIn(cla, JacksonExclusionStrategy.MyFilter.class);
        }
    }

}