对map通过key进行排序

1、升序

public Map getAscMap(Map map){if(map==null||map.isEmpty()){return null;}Map<String, Object> treeMap=new TreeMap<String,Object>(new Comparator<String>() {@Overridepublic int compare(String o1, String o2) {return o1.compareTo(o2);}});treeMap.putAll(map);return treeMap;}

2、倒序

public Map getAbscMap(Map map){if(map==null||map.isEmpty()){return null;}Map<String, Object> treeMap=new TreeMap<String, Object>(new Comparator<String>() {@Overridepublic int compare(String o1, String o2) {return o2.compareTo(o1);}});treeMap.putAll(map);return treeMap;}