24:00通过parseDateStr(object.toString(),“HH“)得到的是0-优快云博客

本文链接：https://blog.youkuaiyun.com/chen_heng_Ali/article/details/118185931

这篇博客主要展示了如何在Java中处理24小时制的时间字符串。通过`getHourNow`和`getHourOrigin`两个方法，分别在接收到24:00这样的时间字符串时，返回24和0。这两个方法内部使用了`substring`和`SimpleDateFormat`进行日期格式化和解析。

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一、代码

@Test
  void testHour(){
    String hour = "24:00";
    Integer laterHour = getHourOrigin(hour);
    System.out.println("laterHour->"+laterHour);
    Integer correctHour = getHourNow(hour);
    System.out.println("correctHour->"+correctHour);
  }

  /**
   * 若传参是24:00得到的是24
   * @param object
   * @return
   */
  private Integer getHourNow(Object object){
    int hour = 0;
    if (object instanceof String) {
      hour = Integer.valueOf(((String) object).substring(0, ((String) object).indexOf(":")));
    } else if(object instanceof Date){
      hour = Integer.valueOf(formatDate((Date) object, "HH"));
    }
    return hour;
  }

  /**
   * 若传参是24:00得到的是0
   * @param object
   * @return
   */
  private Integer getHourOrigin(Object object){
    int hour = 0;
    if (object instanceof String) {
      hour = Integer.valueOf(formatDate(parseDateStr(object.toString(),"HH"), "HH"));
    } else if(object instanceof Date){
      hour = Integer.valueOf(formatDate((Date) object, "HH"));
    }
    return hour;
  }

  public static String formatDate(Date date,String formatPattern){
    if(date == null || StringUtils.isBlank(formatPattern)){
      throw new RuntimeException("传入参数异常，日期format报错");
    }
    SimpleDateFormat sdf = new SimpleDateFormat(formatPattern);
    return sdf.format(date);
  }

  public static Date parseDateStr(String time, String formatPattern){
    if(StringUtils.isBlank(time) || StringUtils.isBlank(formatPattern)){
      throw new RuntimeException("传入参数异常，日期字符串parse报错");
    }
    SimpleDateFormat f = new SimpleDateFormat(formatPattern);
    try {
      return f.parse(time);
    } catch (ParseException e) {
      e.printStackTrace();
    }
    return null;
  }