Collections.sort对中文的排序

package lession;import java.io.UnsupportedEncodingException;import java.text.Collator;import java.util.Comparator;import java.util.List;import java.util.ArrayList;import java.util.Collections;class User { String name; int age; public User(String name,int age){  this.name=name;  this.age=age; } public int getAge() {  return age; } public void setAge(int age) {  this.age = age; } public String getName() {  return name; } public void setName(String name) {  this.name = name; } }class ComparatorUser implements Comparator{ Collator collator = Collator.getInstance(java.util.Locale.CHINA); public int compare(Object arg0, Object arg1) {  User user0=(User)arg0;  User user1=(User)arg1;  String name0=toUTF_8(user0.getName());  String name1=toUTF_8(user1.getName());  int age0=user0.getAge();  int age1=user1.getAge();  //先比较名字再比较年龄  int flag=collator.getCollationKey(name0).compareTo(collator.getCollationKey(name1));  if(flag==0){   return Integer.valueOf(age0).compareTo(Integer.valueOf(age1));  }else{   return flag;  }   } private static String toUTF_8(String str) {     try {         return new String(str.getBytes(), "ISO-8859-1");     } catch (UnsupportedEncodingException e) {         e.printStackTrace();         throw new RuntimeException(e);     } }}public class SortTest { public static void main(String[] args){  List userlist=new ArrayList();  userlist.add(new User("吉斌",4));  userlist.add(new User("何佳",1));  userlist.add(new User("张哲",5));  userlist.add(new User("段建波",6));    userlist.add(new User("邓斯奇",5));  userlist.add(new User("邓斯奇",3));  ComparatorUser comparator=new ComparatorUser();  Collections.sort(userlist, comparator);  for (int i=0;i<userlist.size();i++){   User user_temp=(User)userlist.get(i);      System.out.println(user_temp.getName()+","+user_temp.getAge());   } }}