Java中遍历Map的两种方法：keySet和entrySet

//方法一

 Set set = map.keySet();

for (String s:set) {

System.out.println(s+","+map.get(s));

}

//方法二

Set> entryseSet=map.entrySet();

for (Map.Entry entry:entryseSet) {

System.out.println(entry.getKey()+","+entry.getValue());

}