java集合的遍历

map集合的遍历

Iterator iter = map.entrySet().iterator();while (iter.hasNext()) {Map.Entry entry = (Map.Entry) iter.next();Object key = entry.getKey();Object val = entry.getValue();System.out.println("key:" +key + "\t value:" + val);}

map集合第二种遍历方式：

Set<String> names = parameterMap.keySet();for (String name: names) {String[] values = parameterMap.get(name);System.out.println(name + " = " + values);}