bean 与 string 相互转换

/**
     * 将任意类型转换成字符串
     * @param value
     * @param <T>
     * @return
     */
    public static <T> String beanToString(T value) {
        Class<?> clazz = value.getClass();
        if(clazz == int.class || clazz == Integer.class) {
            return value + "";
        }else if(clazz == String.class) {
            return (String)value;
        }else if(clazz == long.class || clazz == Long.class) {
            return value + "";
        }else {
            return JSON.toJSONString(value);
        }
    }

/**
    * 把一个字符串转换成bean对象
    * @param str
    * @param <T>
    * @return
    */
   public static <T> T stringToBean(String str, Class<T> clazz) {
       if(str == null || str.length() <= 0 || clazz == null) {
           return null;
       }
       if(clazz == int.class || clazz == Integer.class) {
           return (T)Integer.valueOf(str);
       }else if(clazz == String.class) {
           return (T)str;
       }else if(clazz == long.class || clazz == Long.class) {
           return  (T)Long.valueOf(str);
       }else {
           return JSON.toJavaObject(JSON.parseObject(str), clazz);
       }
   }