Resolve Element 'mvc:annotation-driven' must have no character

To resolve the error

cvc-complex-type.2.1: Element 'mvc:annotation-driven' must have no character or element information item [children], because the type's content type is empty.

chagne the mvc schemaLocation to newer version, for example, 3.2 works for me.

<beans xmlns="http://www.springframework.org/schema/beans"
        ...
 xsi:schemaLocation="
        http://www.springframework.org/schema/beans     
        ...
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">

Compute SHA checksum for a string on MAC terminal

$echo -n <the_string> | shasum -a 256

Explanation:
The option -n tells echo not to output the trailing newline.
The option -a 256 of shasum specifies to use 256 algorithm.