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);
}
}