Java——Json字符串与Object互转

    public static void JacksonTest() {//推荐
        //{"MNG001":[{"ID":"1","PWD":"2"}],"MNG002":[{"FaultCode":"1","PWD":"3"}]}
        String json = "{\"MNG001\":[{\"ID\":\"1\",\"PWD\":\"2\"}],\"MNG002\":[{\"FaultCode\":\"1\",\"PWD\":\"3\"}]}";

        ObjectMapper mapper = new ObjectMapper();
        //把json字符串转为对象
        Object object = null;
        try {
            object = mapper.readValue(json, Object.class);
        } catch (JsonParseException e) {
            e.printStackTrace();
        } catch (JsonMappingException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.out.println("JsonToObject-->"+object.toString());
        //把对象转为json字符串
        String objectjson = "";
        try {
            objectjson = mapper.writeValueAsString(object);
        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }
        System.out.println("ObjectToJson-->"+objectjson);
    }

    public static void GsonTest() {
        //{"MNG001":[{"ID":"1","PWD":"2"}],"MNG002":[{"FaultCode":"1","PWD":"3"}]}
        String json = "{\"MNG001\":[{\"ID\":\"1\",\"PWD\":\"2\"}],\"MNG002\":[{\"FaultCode\":\"1\",\"PWD\":\"3\"}]}";

        Gson gson = new Gson();
        //把json字符串转对象
        Object object = gson.fromJson(json, Object.class);
        System.out.println("JsonToObject-->"+object.toString());
        //把对象转json字符串
        String objectjson = gson.toJson(object);
        System.out.println("ObjectToJson-->"+objectjson);
    }