转载：java List 排序 Collections.sort() 对 List 排序

//一个POJO例子

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;

 } 

}

//具体的比较类，实现Comparator接口

import java.util.Comparator;

import java.util.List;

import java.util.ArrayList;

import java.util.Collections;

public class ComparatorUser implements Comparator{