根据List中对象的某个属性进行去重

package com.huixin;
import java.util.*;
/**
  * 根据对象属性字段给list集合去重
  *
  * @author Lance
  * @date 2017/03/14
  */
 public class ListQC {
     public static void main(String[] args) {
         List<User> userList = new ArrayList<User>();
         User user1 = new User("张三", "001");
         userList.add(user1);
         User user2 = new User("李四", "001");
         userList.add(user2);
         User user3 = new User("王五", "002");
         userList.add(user3);
         for (User u : userList) {
             System.out.println(u.getName());
         }
         System.out.println("去重后=======>");
         List<User> userListNoDupAndSort = removeDuplicateUser(userList);
         for (User u : userListNoDupAndSort) {
             System.out.println(u.getName());
         }
     }
     private static ArrayList<User> removeDuplicateUser(List<User> users) {
         Set<User> set = new TreeSet<User>(new Comparator<User>() {
 @Override
             public int compare(User o1, User o2) {
                 //字符串,则按照asicc码升序排列
                 return o1.getUserId().compareTo(o2.getUserId());
             }
         });
         set.addAll(users);
         return new ArrayList<User>(set);
     }
 }
 class User {
     private String name;
     private String userId;
    public User(String name, String userId) {
         this.name = name;
         this.userId = userId;
     }
    public String getName() {
         return name;
     }
    public void setName(String name) {
         this.name = name;
     }
    public String getUserId() {
         return userId;
     }
    public void setUserId(String userId) {
         this.userId = userId;
     }
 }
 
---------------------
private List<AuditResult> removeDuplicateModel(List<AuditResult> results) {
         Set<AuditResult> set = new TreeSet<>(new Comparator<AuditResult>() {
 @Override
             public int compare(AuditResult o1, AuditResult o2) {
                 //字符串,则按照asicc码升序排列
                 return o1.getAuditEntity().compareTo(o2.getAuditEntity());
             }
         });
         set.addAll(results);
         return new ArrayList<>(set);
 }