java日期转换成字符串

package com.webkfa.test;
import java.text.SimpleDateFormat;
import java.util.Date;
public class Test {
	/**
	 * 日期转换成字符串
	 * 
	 * @param date
	 * @param formatStr
	 *            "yyyy-MM-dd HH:mm:ss" "yyyy-MM-dd"
	 * @return str
	 */
	public static String DateToStr(Date date, String formatStr) {
		if (formatStr==null || "".equals(formatStr)) {
			formatStr = "yyyy-MM-dd";
		}
		SimpleDateFormat format = new SimpleDateFormat(formatStr);
		String str = format.format(date);
		return str;
	}
	public static void main(String[] args){
		String str=DateToStr(new Date(),"yyyy-MM-dd");
		System.out.println(str);
	}
}