java 时间格式转换

import java.io.IOException;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Date;import java.util.regex.Matcher;import java.util.regex.Pattern;import org.apache.commons.httpclient.HttpClient;import org.apache.commons.httpclient.HttpException;import org.apache.commons.httpclient.HttpStatus;import org.apache.commons.httpclient.methods.GetMethod;import org.apache.commons.httpclient.methods.PostMethod;import org.htmlparser.Node;import org.htmlparser.Parser;import org.htmlparser.filters.AndFilter;import org.htmlparser.filters.HasAttributeFilter;import org.htmlparser.filters.TagNameFilter;import org.htmlparser.util.NodeList;import org.htmlparser.util.ParserException;import com.sun.org.apache.bcel.internal.generic.NEW;public class test {public static void main(String[] args) throws HttpException, IOException, ParserException {// TODO Auto-generated method stub//时间转换:String strSourcePattern = "yyyy-MM-dd HH:mm:ss";String strDestPattern = "yyyy-MM-dd";  String strTime = "2012-06-12 04:00:00";  try {      SimpleDateFormat sourceDateFormat = new SimpleDateFormat(strSourcePattern, Locale.US);    SimpleDateFormat destDateFormat = new SimpleDateFormat(strDestPattern, Locale.US);    Date date = sourceDateFormat.parse(strTime);      System.out.println(destDateFormat.format(date));    } catch (ParseException e) {  }                     }}