取出List<Map<String,Object>>里面Map的key:value值
1.取出Map其中一个属性的值
Map map = new HashMap(); map.put("key1", "value1"); map.put("key2", "value2"); List> list = new ArrayList>(); list.add(map); for(int i = 0;i < list.size();i++) { Map<String,Object> map = list.get(i); String authorStr = map.get("key1").toString(); System.out.println("author" + " : " + authorStr); }
2.取出所有的key:value
//第一种: Map map = new HashMap(); map.put("key1", "value1"); map.put("key2", "value2"); <List> list = new ArrayList>(); list.add(map); for (Map m : list) { for (String k : m.keySet()) { System.out.println(k + " : " + m.get(k)); } } //第二种: Map map = new HashMap(); map.put("key1", "value1"); map.put("key2", "value2"); <List> list = new ArrayList>(); list.add(map); for(Map map:list) { for(Map.Entry e:map) { e.getKey() 和 e.getValue() 就是你想要的 } } //第三种: Map map = new HashMap(); map.put("key1", "value1"); map.put("key2", "value2"); <List> list = new ArrayList>(); list.add(map); for (int i=0;i<list.size();i++) { Map map1=(Map)list.get(i); Iterator iterator = map1.keySet().iterator(); while (iterator.hasNext()) { String key = (String) iterator.next(); Object object = map1.get(key); System.out.println(object); } }