[code="java"]
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
public class Main {
/**
* @param args
*/
public static void main(String[] args) {
Map<String,String> map1 = new HashMap<String, String>();
map1.put("operationTime", "2010-01-10 12:20:00");
Map<String,String> map2 = new HashMap<String, String>();
map2.put("operationTime", "2010-01-10 12:40:00");
Map<String,String> map3 = new HashMap<String, String>();
map3.put("operationTime", "2010-01-10 12:30:00");
List<Map<String,String>> list = new ArrayList<Map<String,String>>();
list.add(map1);
list.add(map2);
list.add(map3);
System.out.println("排序前的list:");
System.out.println(list);
final SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Collections.sort(list, new Comparator<Map<String,String>>(){
public int compare(Map<String, String> o1, Map<String, String> o2)
{
//取出操作时间
int ret = 0;
try
{
ret = df.parse(o1.get("operationTime")).compareTo(df.parse(o2.get("operationTime")));
} catch (ParseException e)
{
throw new RuntimeException(e);
}
return ret;
}
});
System.out.println("排序后的list:");
System.out.println(list);
}
}
[/code]