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);
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