json转换工具

package com.nkay.common.util;

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

import com.fasterxml.jackson.core.JsonGenerationException;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.objectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.type.TypeFactory;

/**
 * JSON工具类
 */

public class JsonUtil {
	protected static LogService log = LogService.getLogger（JsonUtil.class）;
	
	private static objectMapper mapper = new objectMapper（）;
	
	static {