import java.util.ArrayList;
import java.util.List;
import org.apache.shiro.SecurityUtils;
import org.apache.shiro.subject.Subject;
import java.util.*;
import java.util.stream.Collectors;
import static java.util.Comparator.comparing;
import static java.util.Comparator.comparingLong;
import static java.util.stream.Collectors.collectingAndThen;
import static java.util.stream.Collectors.toCollection;
1 public static void main(String[] args) {
2 Milk milk0=new Milk(0,"123456");
3 Milk milk1=new Milk(1,"123476");
4 Milk milk2=new Milk(0,"876433");
5 List<Milk> list=new ArrayList<>();
6 list.add(milk0);
7 list.add(milk1);
8 list.add(milk2);
9 //去重
10 List<Milk> uniqueMilk = list.stream().collect(
11 collectingAndThen(
12 toCollection(() -> new TreeSet<>(comparing(n->n.getKey()))),ArrayList::new)
13 );
14
15 for (Milk m:uniqueMilk) {
16 System.out.println(m.toString());
17 }
18
19 }
public class Milk {
private Integer key;
private String value;
public Milk(Integer key, String value) {
this.key = key;
this.value = value;
}
public Integer getKey() {
return key;
}
public void setKey(Integer key) {
this.key = key;
}
public String getValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
@Override
public String toString() {
return "Milk{" + "key=" + key + ", value='" + value + '\'' + '}';
}
}
