Map遍历

for (String key : map.keySet()) {
    System.out.println(key);
}
for (String value : map.values()) {
    System.out.println(value);
}

Iterator<Entry<String, String>> entries = map.entrySet().iterator();
while (entries.hasNext()) {
    Entry<String, String> entry = entries.next();
    String key = entry.getKey();
    String value = entry.getValue();
    System.out.println(key + ":" + value);
}

for (Map.Entry<String, String> entry : map.entrySet()) {
    String mapKey = entry.getKey();
    String mapValue = entry.getValue();
    System.out.println(mapKey + "：" + mapValue);
}

for(String key : map.keySet()){
    String value = map.get(key);
    System.out.println(key+":"+value);
}