通过反射实现get和set方法

佚名 6年前 (2019-04-27) 随笔 1326人围观抢沙发百度已收录

/* setter方法 o:要操作类的对象 args:属性名 attributeValue:属性值 */
    public static void setXxx(Object o,String args,Object attributeValue){ Class cls = o.getClass(); //判断该属性是否存在
        Field field = null; try { field = cls.getDeclaredField(args); if(field == null){ field = cls.getField(args); } if(field == null){ return; } } catch (NoSuchFieldException e) { e.printStackTrace(); } String fieldName = "set"+args.substring(0,1).toUpperCase()+(args.length()>1?args.substring(1):""); Method method = null; try { method = cls.getMethod(fieldName,attributeValue.getClass()); method.invoke(o,attributeValue); } catch (NoSuchMethodException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } }

 /* getter方法 o:要操作类的对象 args:属性名 */
    public static <T> T getXxx(T o,String args) throws NoSuchFieldException { Class cls = o.getClass(); //判断该属性是否存在
        Field field = field = cls.getDeclaredField(args); if(field == null){ field = cls.getField(args); } if(field == null){ return null; } String fieldName = "get"+args.substring(0,1).toUpperCase()+(args.length()>1?args.substring(1):""); Method method = null; try { method = cls.getMethod(fieldName); return (T)method.invoke(o); } catch (NoSuchMethodException e) { e.printStackTrace(); } catch (IllegalAccessException e) { e.printStackTrace(); } catch (InvocationTargetException e) { e.printStackTrace(); } return null; }