Java Map的几种循环方式总结

for(String dataKey : paraMap.keySet())   
{   
    System.out.println(dataKey );              
}

for(Map.Entry<String, Object> entry : paraMap.entrySet())   
{   
    System.out.println(entry.getKey()+": "+entry.getValue());   
}

Iterator it = paraMap.entrySet().iterator();   
while (it.hasNext())    
{   
        Map.Entry pairs = (Map.Entry)it.next();   
        System.out.println(pairs.getKey() + " = " + pairs.getValue());   
 }