alibaba.fastjson.JSON

JSON数据各种解析，最近刚好用到感觉还不错
http://jingyan.baidu.com/article/c74d6000672e450f6b595d53.html
这里只举一个例子，以下为String类型的json串：

{“returnCode”:”00000000”,”returnMsg”:”操作成功”,”QueueInfo”:[{“QueueNum”:”J001”,”StrCustName”:”张三”,”WaitNum”:”0”,”CustGrade”:”0”,”PrintTime”:”2016-12-19 09:37:48”}]}

    public static void main(String[] args) {
        //转义
        String jsonStr="{\"returnCode\":\"00000000\",\"returnMsg\":\"操作成功\",\"QueueInfo\":[{\"QueueNum\":\"J001\",\"StrCustName\":\"张三\",\"WaitNum\":\"0\",\"CustGrade\":\"0\",\"PrintTime\":\"2016-12-19  09:37:48\"}]}";
        //先转成对象
        JSONObject json =JSONObject.parseObject(jsonStr);
        //这时候来点简单的
        String returnCode=json.getString("returnCode");
        String returnMsg=json.getString("returnMsg");

        //System.out.println(returnCode);
        //System.out.println(returnMsg);

        //然后对应QueueInfo，注意它对应的value是 List<Map<String,String>> 类型的
        String queueInfo=json.getString("QueueInfo");
        List<Map<String,String>> list = JSON.parseObject(queueInfo,new TypeReference<List<Map<String,String>>>(){});

        //大家可以测试下list.get(0).get("StrCustName")

        for(Map<String,String> lis:list){
            System.out.println(lis);
            System.out.println(lis.get("StrCustName"));
        }
    }