java反射

/**
    * java反射bean的get方法
    *
    * @param objectClass
    * @param fieldName
    * @return
    */
   @SuppressWarnings("unchecked")
   public static Method getGetMethod(Class objectClass, String fieldName) {
       StringBuffer sb = new StringBuffer();
       sb.append("get");
       sb.append(fieldName.substring(0, 1).toUpperCase());
       sb.append(fieldName.substring(1));
       try {
           return objectClass.getMethod(sb.toString());
       } catch (Exception e) {
       }
       return null;
   }

/**
     * java反射bean的set方法
     *
     * @param objectClass
     * @param fieldName
     * @return
     */
    @SuppressWarnings("unchecked")
    public static Method getSetMethod(Class objectClass, String fieldName) {
        try {
            Class[] parameterTypes = new Class[1];
            Field field = objectClass.getDeclaredField(fieldName);
            parameterTypes[0] = field.getType();
            StringBuffer sb = new StringBuffer();
            sb.append("set");
            sb.append(fieldName.substring(0, 1).toUpperCase());
            sb.append(fieldName.substring(1));
            Method method = objectClass.getMethod(sb.toString(), parameterTypes);
            return method;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

/**
     * 执行set方法
     *
     * @param o 执行对象
     * @param fieldName 属性
     * @param value 值
     */
    public static void invokeSet(Object o, String fieldName, Object value) {
        Method method = getSetMethod(o.getClass(), fieldName);
        try {
            method.invoke(o, new Object[] { value });
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 执行get方法
     *
     * @param o 执行对象
     * @param fieldName 属性
     */
    public static Object invokeGet(Object o, String fieldName) {
        Method method = getGetMethod(o.getClass(), fieldName);
        try {
            return method.invoke(o, new Object[0]);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }