文章目錄

• jackson
• Gson

jackson

package com.zhidianfan.pig.yd.utils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.
 
ObjectMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * JSON工具類
 *
 * @Author sherry
 * @Description
 * @Date Create in 2018/8/15
 * @Modified By:
 */

public class
 
 JsonUtils {
    private static final ObjectMapper mapper = new ObjectMapper();

    private static Logger logger = LoggerFactory.getLogger(JsonUtils.class);

    /**
     * 物件轉JSON字串
     *
     * @param o
     * @return
     * @throws JsonProcessingException
     */
    public static String obj2Json
 
(Object o) {

        String jsonStr = null;
        try {
            jsonStr = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(o);
        } catch (JsonProcessingException e) {
            logger.error("對{}轉化json失敗", o);
            logger.error(e.getMessage(), e);
        }
        return jsonStr;
    }

    /**
     * JSON字串轉物件
     *
     * @param str
     * @param t
     * @param <T>
     * @return
     */
    public static <T> T jsonStr2Obj(String str, Class<T> t) {
        try {
            return mapper.readValue(str, t);
        } catch (IOException e) {
            logger.error(str + "\n轉化成物件失敗");
            logger.error(e.getMessage(), e);
        }
        return null;
    }

}

Gson

package org.zln.test.wiremock.support;

import com.google.gson.Gson;

import java.lang.reflect.Type;

/**
 * @Author sherry
 * @Description
 * @Date Create in 2018/9/10
 * @Modified By:
 */

public class JsonUtils {

    private static final Gson gson = new Gson();

    /**
     * 物件轉JSON字串
     *
     * @param o
     * @return
     */
    public static String obj2Json(Object o) {
        return gson.toJson(o);
    }

    /**
     * JSON字串轉物件
     *
     * @param str
     * @param t
     * @param <T>
     * @return
     */
    public static <T> T jsonStr2Obj(String str, Class<T> t) {
        return gson.fromJson(str, t);
    }

    public static <T> T jsonStr2Obj2(String str, Type t) {
        return gson.fromJson(str, t);
    }
}