Question

List<Map<String,Object>> list 中有“id" "name"......等字段，好多数据，按照name排序

如{[1,aa,..][2,cc..][3,bb..].......}按照name排序，输出{[1,aa..][3,bb..][2,cc..]

Answer 1

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Map;

public class Du {

public static void main(String[] args) {

List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();

Collections.sort(list, new Comparator<Map<String, Object>>(){

public int compare(Map<String, Object> o1, Map<String, Object> o2) {
String name1 = "";//name1是从你list里面拿出来的一个
String name2= ""; //name1是从你list里面拿出来的第二个name

String[] ary = {name1, name2};
Arrays.sort(ary);

if(ary[0].equals(name1)){
return -1;
}else{
return 1;
}

}

});

}
}