java_json总结

1、得到json,通过不断转换，得到想要的key值，此方法较为麻烦：json-lib

{"alibaba_aliqin_fc_sms_num_send_response":{"result":{"err_code":"0","model":"100750884853^1101174334520","success":true},"request_id":"z2cey4146sxj"}}

//得到对应的code值
    public static int getOneString(String body) {
        JSONObject jsonObject = JSONObject.fromObject(body);
        JSONObject jsonObject1 = JSONObject.fromObject(jsonObject.getString("alibaba_aliqin_fc_sms_num_send_response"));
        String errCode = JSONObject.fromObject(jsonObject1.getString("result")).getString("err_code");
        return Integer.parseInt(errCode);
    }

2、org.json:

　　官网：http://developer.android.com/reference/org/json/package-summary.html

　　

3、代码方法：

　　

/**
     * 将Javabean转换为Map
     * 
     * @param javaBean
     *            javaBean
     * @return Map对象
     */
    public static Map toMap(Object javaBean) {
        Map result = new HashMap();
        Method[] methods = javaBean.getClass().getDeclaredMethods();
        for (Method method : methods) {
            try {
                if (method.getName().startsWith("get")) {
                    String field = method.getName();
                    field = field.substring(field.indexOf("get") + 3);
                    field = field.toLowerCase().charAt(0) + field.substring(1);
                    Object value = method.invoke(javaBean, (Object[]) null);
                    result.put(field, null == value ? "" : value.toString());
                }
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
        return result;
    }
    
    /**
     * 将Json对象转换成Map
     * 
     * @param jsonObject
     *            json对象
     * @return Map对象
     * @throws JSONException
     */
    public static Map toMap(String jsonString) throws JSONException {
        JSONObject jsonObject = new JSONObject(jsonString);
        Map result = new HashMap();
        Iterator iterator = (Iterator) jsonObject.keys();
        String key = null;
        String value = null;
        while (iterator.hasNext()) {
            key = (String) iterator.next();
            value = jsonObject.getString(key);
            result.put(key, value);
        }
        return result;
    }
    
    
    /**
     * 将JavaBean转换成JSONObject（通过Map中转）
     * 
     * @param bean
     *            javaBean
     * @return json对象
     */
    public static JSONObject toJSON(Object bean) {

        return new JSONObject(toMap(bean));

    }

    /**
     * 将Map转换成Javabean
     * 
     * @param javabean
     *            javaBean
     * @param data
     *            Map数据
     */
    public static Object toJavaBean(Object javabean, Map data) {

        Method[] methods = javabean.getClass().getDeclaredMethods();
        for (Method method : methods) {

            try {
                if (method.getName().startsWith("set")) {

                    String field = method.getName();
                    field = field.substring(field.indexOf("set") + 3);
                    field = field.toLowerCase().charAt(0) + field.substring(1);
                    method.invoke(javabean, new Object[] {

                    data.get(field)

                    });

                }
            } catch (Exception e) {
            }

        }

        return javabean;

    }

    /**
     * JSONObject到JavaBean
     * 
     * @param bean
     *            javaBean
     * @return json对象
     * @throws ParseException
     *             json解析异常
     * @throws JSONException
     */
    public static void toJavaBean(Object javabean, String jsonString)
            throws ParseException, JSONException {

        JSONObject jsonObject = new JSONObject(jsonString);
    
        Map map = toMap(jsonObject.toString());
        
        toJavaBean(javabean, map);

    }