miduo_gm/src/main/java/com/jmfy/utils/JsonUtil.java

package com.jmfy.utils;

import com.google.gson.Gson;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.servlet.http.HttpServletRequest;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;

public class JsonUtil {

    private static final Logger LOGGER = LoggerFactory.getLogger(JsonUtil.class);
    private static JsonUtil jsonUtil;

    private Gson gson = new Gson();

    private static class InnerClass {
        private static final JsonUtil SINGLETON = new JsonUtil();
    }

    public static JsonUtil getInstence() {
        if (jsonUtil == null) {
            jsonUtil = JsonUtil.InnerClass.SINGLETON;
        }
        return jsonUtil;
    }

    public Gson getGson() {
        return gson;
    }

    public HashMap<String, String> getParameterMap(HttpServletRequest request) {
        HashMap<String, String> map = new HashMap();
        Enumeration paramNames = request.getParameterNames();
        while (paramNames.hasMoreElements()) {
            String paramName = (String) paramNames.nextElement();
            String[] paramValues = request.getParameterValues(paramName);
            String paramValue = paramValues[0];
            map.put(paramName, paramValue);
            LOGGER.info("parameter : " + paramName + "=" + paramValue);
        }
        return map;
    }

    public String getReward( HttpServletRequest request) {
        StringBuilder reward = new StringBuilder();
        String[] itemIds = request.getParameterValues("itemIds[]");
        String[] itemNums = request.getParameterValues("itemNums[]");
        return getReward(itemIds,itemNums);
    }


    public String getReward(String[] itemIds,String[] itemNums) {
        StringBuilder reward = new StringBuilder();

        if (itemIds.length ==0 || itemNums.length ==0 ){
            return reward.toString();
        }
        for (int i = 0; i < itemIds.length; i++){
            if (itemIds[i].isEmpty() || itemNums[i].isEmpty()){
                return reward.toString();
            }
            if (reward.length() == 0){
                reward = new StringBuilder(itemIds[i] + "#" + itemNums[i] );
            }else{
                reward.append("|").append(itemIds[i]).append("#").append(itemNums[i]).append("#");
            }
        }
        return reward.toString();
    }


    public static String getServiceKey(String serviceName, String host, String port) {
        StringBuilder sb = new StringBuilder();
        return sb.append(serviceName).append("|")
                .append(host).append("|")
                .append(port).toString();
    }

    /**
     * 获取日期前一天
     * @param specifiedDay
     * @return
     */
    public static String getSpecifiedDayBefore(String specifiedDay){
//SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
        Calendar c = Calendar.getInstance();
        Date date=null;
        try {
            date = new SimpleDateFormat("yy-MM-dd").parse(specifiedDay);
        } catch (ParseException e) {
            e.printStackTrace();
        }
        c.setTime(date);
        int day=c.get(Calendar.DATE);
        c.set(Calendar.DATE,day-1);

        String dayBefore=new SimpleDateFormat("yyyy-MM-dd").format(c.getTime());
        return dayBefore;
    }
    public static String date2TimeStamp(String date_str){
        try {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            return String.valueOf(sdf.parse(date_str).getTime()/1000);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }
    //年月日时分秒 转为毫秒的时间戳
    public static String date3TimeStamp(String date_str){
        try {
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
            return String.valueOf(sdf.parse(date_str).getTime());
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }
    public static String timeStamp2Date(String seconds) {
        if(seconds == null || seconds.isEmpty() || seconds.equals("null")){
            return "";
        }
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        return sdf.format(new Date(Long.valueOf(seconds)));
    }
    //
    public static long getAppointTimeInXDay(long date, int hour) {
        Calendar calendar = Calendar.getInstance();
        calendar.setTimeInMillis(date);
        calendar.set(Calendar.HOUR_OF_DAY, hour);
        calendar.set(Calendar.MINUTE, 0);
        calendar.set(Calendar.SECOND, 0);
        calendar.set(Calendar.MILLISECOND, 0);
        return calendar.getTimeInMillis();
    }

    public static List<String> getDays(String startTime, String endTime) {

        // 返回的日期集合
        List<String> days = new ArrayList<String>();

        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");
        try {
            Date start = dateFormat.parse(startTime);
            Date end = dateFormat.parse(endTime);

            Calendar tempStart = Calendar.getInstance();
            tempStart.setTime(start);

            Calendar tempEnd = Calendar.getInstance();
            tempEnd.setTime(end);
            tempEnd.add(Calendar.DATE, +1);// 日期加1(包含结束)
            while (tempStart.before(tempEnd)) {
                days.add(dateFormat.format(tempStart.getTime()));
                tempStart.add(Calendar.DAY_OF_YEAR, 1);
            }
        } catch (ParseException e) {
            e.printStackTrace();
        }

        return days;
    }
}