Map<String, Integer> map = new HashMap<>();
map.put( "staff9", 1 );
map.put( "staff1", 3 );
System.out.println(map.toString());
System.out.println(JSONObject.toJSONString(map));
List<Map<String, Integer>> list = new ArrayList<>();
list.add(map);
System.out.println(list.toString());
System.out.println(JSONArray.toJSONString(list));
结果
{staff9=1, staff1=3}
{"staff9":1,"staff1":3}
[{staff9=1, staff1=3}]
[{"staff9":1,"staff1":3}]
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