Java——Json字符串與Object互轉

    public static void JacksonTest() {//推薦
        //{"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字符串轉為對象
        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());
        //把對象轉為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字符串轉對象
        Object object = gson.fromJson(json, Object.class);
        System.out.println("JsonToObject-->"+object.toString());
        //把對象轉json字符串
        String objectjson = gson.toJson(object);
        System.out.println("ObjectToJson-->"+objectjson);
    }