Map与JSON之间转换

//Map转换成JSON

Map map = new HashMap(); map.put("a","aaa"); map.put("b","bbb"); map.put("c","ccc"); String json=JSON.toJSONString(map); System.out.println(json);//输出{"a":"aaa","b":"bbb","c":"ccc"}

//JSON转换成Map

Map map1 = JSON.parseObject(json);System.out.println(map1.get("a"));for (Object mapData : map.entrySet()) {Map.Entry entry = (Map.Entry)mapData;System.out.println(entry.getKey()+"--->"+entry.getValue());}

map中含有对象Map -> JSON

//Map -> JSONMap map = new HashMap(); map.put("a",new Bar()); map.put("b",new Bar()); map.put("c",new Bar()); String json = JSON.toJSONString(map,true); System.out.println(json); 

//JSON -> Map

Map map1 = (Map)JSON.parse(json); for (String key : map1.keySet()) { System.out.println(key+":"+map1.get(key)); } 

来自：http://www.cnblogs.com/DreamDrive/p/5778959.html