Spring AOP实现拦截转发控制

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;

@Aspect
public class demoInterceptor {

private demoInterceptor() {

};

@Pointcut("execution(* com.demo.controller.login(..))")
private void interceptor() {
};

@Around("interceptor()")
public Object aroundLogin(ProceedingJoinPoint point) throws Throwable {
HttpServletRequest request = null;
HttpServletResponse response = null;
Object[] args = point.getArgs();
for (int i = ; i < args.length; i++) {
if (args[i] instanceof HttpServletRequest) {
request = (HttpServletRequest) args[i];
}
if (args[i] instanceof HttpServletResponse) {
response = (HttpServletResponse) args[i];
}

}
if (request.getParameter("j_username").equals("demo")) {

return point.proceed();
} else {
response.sendRedirect("/login.do");
return null;
}
}
}

aop-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">
<aop:aspectj-autoproxy/>
<bean class="demoInterceptor"/>
</beans>

转自：http://www.iprotoss.com/?p=130