package com.alibaba.dubbo.governance.web.common.pulltool; import java.text.DateFormat; import java.text.SimpleDateFormat; import java.util.HashMap; import java.util.Map; import org.apache.commons.lang.StringUtils; /** * DateFormat Utility * * @author guanghui.shigh */ public class DateFormatUtil { private static final String DEFAULT_FORMAT = "yyyy-MM-dd HH:mm:ss"; private static final ThreadLocal<Map<String, DateFormat>> tl = new ThreadLocal<Map<String, DateFormat>>(); /** * According to the specified format, Get a DateFormat * * @param format * @return */ public static DateFormat getDateFormat(String format) { Map<String, DateFormat> map = tl.get(); if (map == null) { map = new HashMap<String, DateFormat>(); tl.set(map); } if (StringUtils.isEmpty(format)) { format = DEFAULT_FORMAT; } DateFormat ret = map.get(format); if (ret == null) { ret = new SimpleDateFormat(format); map.put(format, ret); } return ret; } /** * Get Default DateFormat * * @return */ public static DateFormat getDateFormat() { return getDateFormat(null); } }