What’s the difference between @Secured and @PreAuthorize in spring security 3?

Question

The real difference is that @PreAuthorize can work with Spring Expression Language (SpEL). You can:

Access methods and properties of SecurityExpressionRoot.
Access method arguments (requires compilation with debug info or custom ParameterNameDiscoverer):
```
@PreAuthorize("#contact.name == principal.name")
public void doSomething(Contact contact)
```
(Advanced feature) Add your own methods (override MethodSecurityExpressionHandler and set it as <global-method-security><expression-handler ... /></...>).