java将对象转map,map转对象工具类

 /**
     * 将map转换为一个对象
     *
     * @param map
     * @param beanClass
     * @return
     * @throws Exception
     */
    public static Object mapToObject(Map<String, String> map, Class<?> beanClass) throws Exception {
        if (map == null)
            return null;

        Object obj = beanClass.newInstance();

        BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
        PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
        for (PropertyDescriptor property : propertyDescriptors) {
            Method setter = property.getWriteMethod();
            if (setter != null) {
                setter.invoke(obj, map.get(property.getName()));
            }
        }

        return obj;
    }

    /**
     * 将对象转换为map
     *
     * @param obj
     * @return
     * @throws Exception
     */
    public static Map<String, String> obj2Map(Object obj) {

        Map<String, String> map = new HashMap<String, String>();
        // System.out.println(obj.getClass());
        // 获取f对象对应类中的所有属性域
        Field[] fields = obj.getClass().getDeclaredFields();
        for (int i = 0, len = fields.length; i < len; i++) {
            String varName = fields[i].getName();
            varName = varName.toLowerCase();//将key置为小写，默认为对象的属性
            try {
                // 获取原来的访问控制权限
                boolean accessFlag = fields[i].isAccessible();
                // 修改访问控制权限
                fields[i].setAccessible(true);
                // 获取在对象f中属性fields[i]对应的对象中的变量
                Object o = fields[i].get(obj);
                if (o != null)
                    map.put(varName, o.toString());
                // System.out.println("传入的对象中包含一个如下的变量：" + varName + " = " + o);
                // 恢复访问控制权限
                fields[i].setAccessible(accessFlag);
            } catch (IllegalArgumentException ex) {
                ex.printStackTrace();
            } catch (IllegalAccessException ex) {
                ex.printStackTrace();
            }
        }
        return map;
    }