java.text.ParseException: Unparseable date: "14/Sep/2011:18:54:

import java.text.ParseException;  import java.text.SimpleDateFormat;  import java.util.Date;import java.util.Locale;  public class ConvertDemo {    /** * 日期转换成字符串 * @param date  * @return str */  public static String DateToStr(Date date) {         SimpleDateFormat format = new SimpleDateFormat("dd/MMM/yyyy:HH:mm:ss",Locale.US);   String str = format.format(date);     return str;  }     /** * 字符串转换成日期 * @param str * @return date */  public static Date StrToDate(String str) {     SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");     Date date = null;     try {         date = format.parse(str);   } catch (ParseException e) {      e.printStackTrace();     }     return date;  }    public static void main(String[] args) {         Date date = new Date();     System.out.println("日期转字符串：" + ConvertDemo.DateToStr(date));     System.out.println("字符串转日期：" + ConvertDemo.StrToDate((ConvertDemo.DateToStr(date).toString())));      }    }