利用重载的方式，编写返回指定当前时间格式的，JsonUtils工

package com.ruoyi.wuzichaoshi.controller;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;

import java.text.SimpleDateFormat;

/**
 * author:xyb
 * Date:2020/2/20 21:16
 */
public class JsonUtils {

    public static String getJson(Object object) {
        return getJson(object, "yyyy-MM-dd HH:mm:ss");
    }


    public static String getJson(Object object,String dateFormat){

        ObjectMapper mapper = new ObjectMapper();
        // 关闭jackson反悔时间戳功能
        mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);

        // 自定义时间格式，让mapper指定时间格式为SimpleDateFormat。默认："2020-02-20T13:45:37.762+0000"
        SimpleDateFormat sdf = new SimpleDateFormat(dateFormat);
        mapper.setDateFormat(sdf);

        try {
            return mapper.writeValueAsString(object);
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }

        // 预防空指针？
        return null;

    }
}