日常开发记录

1.遍历Map中的key-value  

               //遍历Map中的key-value

Map<String,String> map =new HashMap<String,String>();
map.put("1","11111");
map.put("2","22222");
map.put("3","33333");
Iterator<Map.Entry<String,String>>  it =  map.entrySet().iterator();
while(it.hasNext()) {
Entry<String, String>  entry = it.next();
String key = entry.getKey();
String value = entry.getValue();
System.out.println("("+key+","+value+")");
}

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