java bean反射 获取get set方法(Method)

 /**
     * 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;
    }