一、Object的属性和值转换到Map中

代码如下：

    public static Map<String,Object> objectToMap(Object o) throws IllegalAccessException {
        HashMap<String, Object> map = new HashMap<>();
        //获取class对象
        Class<?> clazz = o.getClass();
        //获取对象的Field对象数组
        Field[] fields = clazz.getDeclaredFields();
        for (Field field : fields) {
            field.setAccessible(true);
            //获取字段的名称
            String fieldName = field.getName();
            //根据字段名获取字段的属性值
            Object value = field.get(o);

            if(value != null){
                map.put(fieldName,value);
            }
        }

        return map;
    }

二、将Map的key和value封装到object中

    public static  <T> T mapToObject(Map<String, Object> map, Class<T> clazz) throws Exception{
        //创建实例
        T instance = clazz.newInstance();
        Field[] fields = clazz.getDeclaredFields();

        for (Field field : fields) {
            Object o = map.get(field.getName());
            field.setAccessible(true);
            field.set(instance,o);
        }
        return instance;
    }