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规范、简化Json操作，可选Jackson、FastJson实现。并可在TopNB查看耗时统计信息。

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package io.leopard.json;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import com.alibaba.fastjson.JSON;

public class JsonFastJsonImpl implements IJson {

	public JsonFastJsonImpl() {
		JSON.toJSON(null);// 当fastjson包没有引入时，让初始化失败.
	}

	@Override
	public String toJson(Object obj) {
		return JSON.toJSONString(obj);
	}

	@Override
	public String toFormatJson(Object obj) {
		return JSON.toJSONString(obj, true);
	}

	@Override
	public  T toObject(String json, Class clazz) {
		return JSON.parseObject(json, clazz);
	}

	@Override
	public  T toObject(String json, Class clazz, boolean ignoreUnknownField) {
		// TODO ignoreUnknownField未实现
		return JSON.parseObject(json, clazz);
	}

	@Override
	public  List toListObject(String json, Class clazz) {
		return JSON.parseArray(json, clazz);
	}

	@Override
	public  List toListObject(String json, Class clazz, boolean ignoreUnknownField) {
		return JSON.parseArray(json, clazz);
	}

	@Override
	public  List toListObject(List jsonList, Class clazz) {
		if (jsonList == null || jsonList.isEmpty()) {
			return null;
		}
		List list = new ArrayList();
		for (String json : jsonList) {
			list.add(this.toObject(json, clazz));
		}
		return list;
	}

	@Override
	public  List toListObject(List jsonList, Class clazz, boolean ignoreUnknownField) {
		if (jsonList == null || jsonList.isEmpty()) {
			return null;
		}
		List list = new ArrayList();
		for (String json : jsonList) {
			list.add(this.toObject(json, clazz, ignoreUnknownField));
		}
		return list;
	}

	@SuppressWarnings("unchecked")
	@Override
	public Map toMap(String json) {
		return toObject(json, Map.class);
	}

}