List<Map>去重排序

数据格式

[
{
"id":"d3e8a9d6-e4c6-4dd8-a94f-07733d3c1b59",
"parentId":"6d460008-38f7-479d-b6d1-058ebc17dae3",
"myorder":1,
"name":"任务一"
},
{
"id":"6d460008-38f7-479d-b6d1-058ebc17dae3",
"parentId":"33978737-c722-4339-88a1-a9829dd4bca2",
"myorder":1,
"name":"项目一"
},
{
"id":"33978737-c722-4339-88a1-a9829dd4bca2",
"parentId":"5461ed61-543c-4ea1-9cb5-17b008e093a0",
"myorder":1,
"name":"课题一"
},
{
"id":"5461ed61-543c-4ea1-9cb5-17b008e093a0",
"parentId":"57e06272-eab4-4920-ae6a-25e055374851",
"myorder":1,
"name":"电子教案"
},
{
"id":"8d0723db-9087-4c83-8d0e-ab7f24ddf066",
"parentId":"6d460008-38f7-479d-b6d1-058ebc17dae3",
"name":"任务二",
"myorder":2
}
]

 //去重复的

 for ( int i = 0 ; i < newList.size() - 1 ; i ++ ) {
 for ( int j = newList.size() - 1 ; j > i; j -- ) {
 if (newList.get(j).equals(newList.get(i))) {
 newList.remove(j);
 }
 }
 }

 //排序
 this.sort(newList);

 myorder为排序号

 public void sort(List<Map<String, Object>> list) {
 Collections.sort(list, new Comparator<Map<String, Object>>(){
 public int compare(Map<String, Object> o1, Map<String, Object> o2) {
 return (Integer)o1.get("myorder")>(Integer)o2.get("myorder")?1:( (Integer)o1.get("myorder")==(Integer)o2.get("myorder")?0:-1);
 }
 });
 }