spring-3

How to register Spring @Configuration annotated class instead of applicationContext.xml file in web.xml?

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In web.xml you need to bootstrap the context with AnnotationConfigWebApplicationContext: <servlet> <servlet-name>appServlet</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextClass</param-name> <param-value> org.springframework.web.context.support.AnnotationConfigWebApplicationContext </param-value> </init-param> <init-param> <param-name>contextConfigLocation</param-name> <param-value> org.package.YouConfigurationAnnotatedClass </param-value> </init-param> </servlet> And don’t forget to use @EnableWebMvc for your MVC annotations to kick in. further reading: Spring 3.1 MVC Enhancements Spring 3.1 MVC Namespace Enhancements And Configuration EDIT as a … Read more

How to get a method’s annotation value from a ProceedingJoinPoint?

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You can get the Signature from a ProceedingJoinPoint and in case of a method invocation just cast it to a MethodSignature. @Around(“execution(public * *(..)) && @annotation(com.mycompany.MyAnnotation)”) public Object procede(ProceedingJoinPoint call) throws Throwable { MethodSignature signature = (MethodSignature) call.getSignature(); Method method = signature.getMethod(); MyAnnotation myAnnotation = method.getAnnotation(MyAnnotation.class); } But you should first add an annotation attribute. … Read more

What’s the difference between and in servlet?

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<context:annotation-config> declares support for general annotations such as @Required, @Autowired, @PostConstruct, and so on. <mvc:annotation-driven /> declares explicit support for annotation-driven MVC controllers (i.e. @RequestMapping, @Controller, although support for those is the default behaviour), as well as adding support for declarative validation via @Valid and message body marshalling with @RequestBody/ResponseBody.

When use ResponseEntity and @RestController for Spring RESTful applications

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ResponseEntity is meant to represent the entire HTTP response. You can control anything that goes into it: status code, headers, and body. @ResponseBody is a marker for the HTTP response body and @ResponseStatus declares the status code of the HTTP response. @ResponseStatus isn’t very flexible. It marks the entire method so you have to be … Read more

Difference between and

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<context:annotation-config> is used to activate annotations in beans already registered in the application context (no matter if they were defined with XML or by package scanning). <context:component-scan> can also do what <context:annotation-config> does but <context:component-scan> also scans packages to find and register beans within the application context. I’ll use some examples to show the differences/similarities. … Read more

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