java Collections.sort()實現List排序自訂方法

標籤：arraylist   pow   rri   power   name   string   div   java   compareto   

方法一：

package testSimple;import java.util.ArrayList;import java.util.Collections;import java.util.Comparator;import java.util.List;public class testCollectionSort {    public static void main(String[] args) {        List<TblPowerGroup> list = new ArrayList<TblPowerGroup>();        list.add(new TblPowerGroup("100001", "cxx1"));        list.add(new TblPowerGroup("100002", "cxx2"));        list.add(new TblPowerGroup("100003", "cxx6"));        list.add(new TblPowerGroup("100003", "cxx5"));        list.add(new TblPowerGroup("100004", "cxx5"));        list.add(new TblPowerGroup("100004", "cxx6"));        Collections.sort(list, new Comparator<TblPowerGroup>() {            @Override            public int compare(TblPowerGroup o1, TblPowerGroup o2) {                if (o1.getGroupSn().compareTo(o2.getGroupSn()) == 0) {                    return o1.getNodeName().compareTo(o2.getNodeName());                } else {                    return o1.getGroupSn().compareTo(o2.getGroupSn());                }            }        });        System.out.println(list);    }}class TblPowerGroup {    private String groupSn;    private String nodeName;    public TblPowerGroup(String groupSn, String nodeName) {        super();        this.groupSn = groupSn;        this.nodeName = nodeName;    }    public String getGroupSn() {        return groupSn;    }    public void setGroupSn(String groupSn) {        this.groupSn = groupSn;    }    public String getNodeName() {        return nodeName;    }    public void setNodeName(String nodeName) {        this.nodeName = nodeName;    }    @Override    public String toString() {        return "TblPowerGroup [groupSn=" + groupSn + ", nodeName=" + nodeName                + "]";    }}

 

方法二：

package testSimple;import java.util.ArrayList;import java.util.Collections;import java.util.Comparator;import java.util.List;public class testCollectionSort2 {    public static void main(String[] args) {        List<TblPowerGroup> list = new ArrayList<TblPowerGroup>();        list.add(new TblPowerGroup("100001", "cxx1"));        list.add(new TblPowerGroup("100002", "cxx2"));        list.add(new TblPowerGroup("100003", "cxx6"));        list.add(new TblPowerGroup("100003", "cxx5"));        list.add(new TblPowerGroup("100004", "cxx5"));        list.add(new TblPowerGroup("100004", "cxx6"));        Collections.sort(list, new TblPowerGroupSort());        System.out.println(list);    }    private static class TblPowerGroupSort implements Comparator<TblPowerGroup> {        @Override        public int compare(TblPowerGroup o1, TblPowerGroup o2) {            if (o1.getGroupSn().compareTo(o2.getGroupSn()) == 0) {                return o1.getNodeName().compareTo(o2.getNodeName());            } else {                return o1.getGroupSn().compareTo(o2.getGroupSn());            }        }    }}

 

java Collections.sort()實現List排序自訂方法