java时间日期处理
/**
* <p>
* Title: 工具类
* </p>
* <p>
* Description: 用来处理时间日期字符串等
* </p>
* <p>
* Copyright: (C) 2006.11 常用方法，需要者随便拿去^-^
* </p>
*
* @author weiking
* @version 1.０
*/
public class UtilTool {
public UtilTool() {
super();
}
/**
* 取当前打印日期
*
* @return
* @throws java.lang.Exception
*/
public String getPrintDate() {
String printDate = "";
Calendar calendar = new GregorianCalendar();
calendar.setTime(new Date());
printDate += calendar.get(Calendar.YEAR) + "年";
printDate += (calendar.get(Calendar.MONTH) + 1) + "月";
printDate += calendar.get(Calendar.DATE) + "日";
return printDate;
}
/**
* 将指定的日期字符串转化为日期对象
*
* @param dateStr
* 日期字符串
* @return java.util.Date
*/
public static Date getDate(String dateStr, String format) throws Exception {
if (dateStr == null || format == null) {
throw new Exception("数据类型异常" + dateStr + "|" + format);
}
SimpleDateFormat df = new SimpleDateFormat(format);
try {
Date date = df.parse(dateStr);
return date;
} catch (Exception ex) {
return null;
}
}
/**
* 将指定日期转换为 Timestamp
*
* @param date
* 指定日期格式为 "20030908"
* @return Timestamp
* @throws Exception
*/
public static Timestamp getTimestamp(String dateStr) throws Exception {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd 00:00:00.000");
return Timestamp.valueOf(sdf.format(getDate(dateStr, "yyyyMMdd")));
}
/**
* 从指定Timestamp中得到相应的日期
*
* @param datetime
* 指定的Timestamp
* @return 日期 "2003-09-08"
*/
public String getDateFromDateTime(Timestamp datetime) {
SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd");
return sdf.format(datetime).toString();
}
/**
* 得到当前时间的时间戳
*
* @return 当前时间戳
*/
public Timestamp getNowTimestamp() {
long curTime = System.currentTimeMillis();
return new Timestamp(curTime);
}
}
