//用TreeSet可以自然排序呀  不就是升序了么？

如：

package com.testClass;

import java.io.IOException;
import java.util.Iterator;
import java.util.Set;
import java.util.TreeSet;

public class Test2 {

    /**
     * @param args
     * @throws IOException
     */
    public static void main(String[] args) throws Exception {

        String time[] = {"2011/02/12 10:00~12:00","2011/03/12 13:00~15:00","2011/05/21 16:00~18:00","2010/12/07 19:00~21:00"};
        
        Set<String> set = new TreeSet<String>();
        
        for (int i = 0; i < time.length; i++) {
            set.add(time[i]);
        }
        
        Iterator<String> iterator = set.iterator();
        
        while(iterator.hasNext()){
            
            System.out.println(iterator.next()+"\n");
        }
        
    }

}