map中key值相等 对应value值加1

public static void main(String[] args) {Map<String, List<String>> input = new HashMap<String, List<String>>();List<String> list = new ArrayList<String>();list.add("《狂人日记》");list.add("《狂人日记》");list.add("《狂人日记》");list.add("《狂人日记》");input.put("小王", list);Map<String, Map<String, Integer>> maplist = add(input);System.out.println(maplist.get("小王").get("《狂人日记》"));}public static Map<String, Map<String, Integer>> add(Map<String, List<String>> input) {Map<String, List<String>> maplist = new HashMap<String, List<String>>();Map<String, Integer> temp = new HashMap<String, Integer>();temp.put("《狂人日记》", 0);Map<String, String> map = new HashMap<String, String>();map.put("小王", "《狂人日记》");Map<String, Map<String, Integer>> map2 = new HashMap<String, Map<String, Integer>>();map2.put("小王", temp);Set<String> names = map2.keySet();Set<String> names2 = input.keySet();for (String str : names) {for (String str2 : names2) {if (str.equals(str2)) {for (String str3 : input.get(str2)) {temp.put(str3, map2.get(str).get(str3) + 1);map2.put(str, temp);}}}}return map2;}