Map的解析(2种):
(1)Iterator it=map.keySet().iterator();
while(it.next()){
Object obj=it.next();
Object value=map.get(obj);
System.out.println("key="+obj+",value="+value);
}
(2)Iterator it=map.entrySet().iterator();
while(it.next()){
Map.Entry entry=(Map.Entry)it.next();
String key=entry.getKey().toString();
String value=entry.getValue().toString();
System.out.println("key="+obj+",value="+value);
}