字符串与json互相转换

//对象转换为jsonList<Map> list = new ArrayList<Map>();//中括号里面的东西Map aqMap = new HashMap();Map bqMap = new HashMap();bqMap.put("name","b");bqMap.put("size",3938);list.add(bqMap);aqMap.put("name","a");aqMap.put("children",list);String resultStr= JSONObject.fromObject(aqMap).toString();//要返回的参数字符这样返回的字符串是{name:a,childeren:[{name:b,size:3938}]}

//json转换成字符串
比如我们定义一个类Student（name,age);

private  ObjectMapper mapper = new ObjectMapper();  List<Student> stuList= new ArrayList<>();stuList= mapper.readValue(json, new TypeReference<List<Student>>() {});这样就把json中的数据读取到stuList中了，很简单吧