Java时间帮助类DateUtil

package com.xy.util;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class DateUtil
{

<wbr>public static final String yyMMdd = "yy-MM-dd";<br><wbr>public static final String yyyyMMdd = "yyyy-MM-dd";<br><wbr>public static final String HHmmss = "HH:mm:ss";<br><wbr>public static final String yyyyMMddHHmmss = "yyyy-MM-dd HH:mm:ss";<br><wbr>public static final String yyMMddHHmmss = "yy-MM-dd HH:mm:ss";</wbr></wbr></wbr></wbr></wbr>

<wbr>public static Date parseToDate(String s, String style)<br><wbr>{<br><wbr><wbr>SimpleDateFormat simpleDateFormat = new SimpleDateFormat();<br><wbr><wbr>simpleDateFormat.applyPattern(style);<br><wbr><wbr>Date date = null;<br><wbr><wbr>if (s == null || s.length() &lt; 8) return null;<br><wbr><wbr>try<br><wbr><wbr>{<br><wbr><wbr><wbr>date = simpleDateFormat.parse(s);<br><wbr><wbr>}<br><wbr><wbr>catch (ParseException e)<br><wbr><wbr>{<br><wbr><wbr><wbr>e.printStackTrace();<br><wbr><wbr>}<br><wbr><wbr>return date;<br><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr>public static String parseToString(String s, String style)<br><wbr>{<br><wbr><wbr>SimpleDateFormat simpleDateFormat = new SimpleDateFormat();<br><wbr><wbr>simpleDateFormat.applyPattern(style);<br><wbr><wbr>Date date = null;<br><wbr><wbr>String str = null;<br><wbr><wbr>if (s == null || s.length() &lt; 8) return null;<br><wbr><wbr>try<br><wbr><wbr>{<br><wbr><wbr><wbr>date = simpleDateFormat.parse(s);<br><wbr><wbr><wbr>str = simpleDateFormat.format(date);<br><wbr><wbr>}<br><wbr><wbr>catch (ParseException e)<br><wbr><wbr>{<br><wbr><wbr><wbr>e.printStackTrace();<br><wbr><wbr>}<br><wbr><wbr>return str;<br><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

<wbr>public static String parseToString(Date date, String style)<br><wbr>{<br><wbr><wbr>SimpleDateFormat simpleDateFormat = new SimpleDateFormat();<br><wbr><wbr>simpleDateFormat.applyPattern(style);<br><wbr><wbr>String str = null;<br><wbr><wbr>if (date == null) return null;<br><wbr><wbr>str = simpleDateFormat.format(date);<br><wbr><wbr>return str;<br><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>

}

<wbr></wbr>

使用方法：

List<Student> stus = sdao.getAllStu();
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for (int i = 0; i < stus.size(); i++)
<wbr><wbr>{<br><wbr><wbr><wbr>System.out.print(stus.get(i).getSname());<br><wbr><wbr><wbr>System.out.print(<strong>DateUtil.parseToString(stus.get(i).getSbirth(), DateUtil.yyyyMMdd)</strong>)<strong>;<br></strong><wbr><wbr><wbr>System.out.print("\n");<br><wbr><wbr>}</wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr></wbr>