Java List Sort tool class by specified field

Article title: Java List Sort the tool class by the specified field.

Article Address: http://blog.csdn.net/5iasp/article/details/17717179

Includes the following classes

1. Entity class

Package com.newyear.wish;

/**
 * Entity class * * */public class Video {public video

	(int id, String title, int hits) {
		super ();
		This.id = ID;
		this.title = title;
		This.hits = hits;
	}

	private int id;
	Private String title;
	private int hits;
	public int getId () {return
		ID;
	}
	public void setId (int id) {
		this.id = ID;
	}
	Public String GetTitle () {return
		title;
	}
	public void Settitle (String title) {
		this.title = title;
	}
	public int gethits () {return
		hits;
	}
	public void sethits (int hits) {
		this.hits = hits;
	}

}

2. List Sort Tool class

Package com.newyear.wish;
Import Java.lang.reflect.Method;
Import java.util.ArrayList;
Import java.util.Collections;
Import Java.util.Comparator;

Import java.util.List; /** * List by the specified field Sort tool class * * @param <T> * * public class Listsortutil<t> {/** * @param targetlist Target sort Li St * @param sortfield sort field (Entity Class Property name) * @param sortmode sort (ASC or DESC)/@SuppressWarnings ({"Unchecked", "Rawtyp Es "}" public void sort (list<t> targetlist, final string SortField, final string sortmode) {Collections.sort (T
				Argetlist, New Comparator () {public int compare (object Obj1, Object obj2) {int retVal = 0; 
					The try {//First letter is capitalized String newstr=sortfield.substring (0, 1). toUpperCase () +sortfield.replacefirst ("\\w", "");
					
					String methodstr= "Get" +NEWSTR;
					Method method1 = ((T) obj1). GetClass (). GetMethod (METHODSTR, NULL);
					Method method2 = ((T) obj2). GetClass (). GetMethod (METHODSTR, NULL); if (SortMode!= null && "desc". Equals (SortMode){RetVal = Method2.invoke ((((t) obj2), null). ToString (). CompareTo (Method1.invoke ((((()) obj1), null). ToString ()); Reverse} else {retVal = Method1.invoke (((t) obj1), null). ToString (). CompareTo (Method2.invoke (((()) obj2), null. ToS Tring ());
				Positive sequence} catch (Exception e) {throw new RuntimeException ();
			return retVal;
	}
		});
 }
	
}

3. Test class

Package com.newyear.wish;

Import java.util.ArrayList;
Import java.util.List;

public class Listsortutiltest {

	/**
	 * @param args
	 *
	/public static void main (string[] args) {

		
		list& Lt video> targetlist = new arraylist<video> ();
		Targetlist.add (New video (1, "title1");
		Targetlist.add (New video (2, "title2");
		Targetlist.add (New Video (3, "Title3");
		System.out.println ("Sort before:" + targetlist);
		
		listsortutil<video> sortlist = new listsortutil<video> ();
		Sortlist.sort (TargetList, "hits", "ASC");
		System.out.println ("After sort:" +targetlist);

	}

Test Execution Results:

Sort before: [com.newyear.wish.video@c17164, Com.newyear.wish.video@1fb8ee3, Com.newyear.wish.video@61de33]
Sort after: [Com.newyear.wish.video@1fb8ee3, com.newyear.wish.video@c17164, Com.newyear.wish.video@61de33]