1.根据传入的对象生成Map集合

 @Test
    public void test02(){
        User user = new User();
        user.setId(1);
        user.setName("Albert");
        user.setSex("男");
        try{
            Map<String, Object> map = getFieldVlaue(user);
            System.out.println("通过反射获取属性值："+map);
        }catch(Exception e) {

        }
    }

    /**
     * 利用反射生成map
     * @param obj
     * @return
     * @throws Exception
     */
    public static Map<String, Object> getFieldVlaue(Object obj) throws Exception {
        Map<String, Object> mapValue = new HashMap<String, Object>();
        Class<?> cls = obj.getClass();
        Field[] fields = cls.getDeclaredFields();
        for (Field field : fields) {
            String name = field.getName();
            String strGet = "get" + name.substring(0, 1).toUpperCase() + name.substring(1, name.length());
            Method methodGet = cls.getDeclaredMethod(strGet);
            Object object = methodGet.invoke(obj);
            String value = object != null ? object.toString() : "";
            mapValue.put(name, value);
        }
        return mapValue;
    }