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package com.qcloud.vod.util;

import com.fasterxml.jackson.databind.ObjectMapper;

/**
 * json工具类
 * @author jianguoxu
 * @time 2017/9/4 20:55
 */
public class JacksonUtil {

    public static ObjectMapper objectMapper;

    /**
     * 使用泛型方法，把json字符串转换为相应的JavaBean对象
     * @param jsonStr
     * @param valueType
     * @param 
     * @return
     */
    public static  T readValue(String jsonStr, Class valueType) {
        if (objectMapper == null) {
            objectMapper = new ObjectMapper();
        }

        try {
            return objectMapper.readValue(jsonStr, valueType);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;
    }

    /**
     * 把JavaBean转换为json字符串
     * @param object
     * @return
     */
    public static String toJSon(Object object) {
        if (objectMapper == null) {
            objectMapper = new ObjectMapper();
        }

        try {
            return objectMapper.writeValueAsString(object);
        } catch (Exception e) {
            e.printStackTrace();
        }

        return null;
    }
}