对对象的某些属性进行排序

package test.user.taojq;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

class User {
	 String name;
	 String age;

	 public User(String name,String age){
	  this.name=name;
	  this.age=age;
	 }
	 public String getAge() {
	  return age;
	 }
	 public void setAge(String age) {
	  this.age = age;
	 }
	 public String getName() {
	  return name;
	 }
	 public void setName(String name) {
	  this.name = name;
	 } 
}
//测试类
public class SortTest {


 public static void main(String[] args){
  List userlist=new ArrayList();
  userlist.add(new User("dd","4"));
  userlist.add(new User("aa","1"));
  userlist.add(new User("ee","5"));
  userlist.add(new User("bb","2"));  
  userlist.add(new User("ff","5"));
  userlist.add(new User("cc","3"));
  userlist.add(new User("gg","6"));

//  ComparatorUser comparator=new ComparatorUser();
//  Collections.sort(userlist, comparator);

  Collections.sort(userlist, new Comparator<User>(){
	  public int compare(User user0, User user1) {
		  int flag=user0.getAge().compareTo(user1.getAge());
		  if(flag==0){
		   return user0.getName().compareTo(user1.getName());
		  }else{
		   return flag;
		  }  
	   }
  });
  for (int i=0;i<userlist.size();i++){
   User user_temp=(User)userlist.get(i);
      System.out.println(user_temp.getAge()+","+user_temp.getName()); 
  }

 }
}