springMVC 拦截器的两种实现方式

1.implements HandlerInterceptor

public class LoginInterceptor implements HandlerInterceptor {

@Override
public void afterCompletion(HttpServletRequest arg0,
HttpServletResponse arg1, Object arg2, Exception arg3)
throws Exception {

}


@Override
public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
Object arg2, ModelAndView arg3) throws Exception {

}


@Override
public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,
Object arg2) throws Exception {
System.out.println("这里是拦截器");
return true;

}

}

2.extends HandlerInterceptorAdapter

public class LoginInterceptor extends HandlerInterceptorAdapter {


@Override
public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,
Object arg2) throws Exception {
System.out.println("这里是拦截器");
return true;
}
}

在spring-mvc.xml中的配置

   <!-- 拦截器 -->
    <mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**" />
<mvc:exclude-mapping path="/resources/**"/>
<mvc:exclude-mapping path="/main/**"/>
<bean class="com.eshore.spring.interceptor.LoginInterceptor" />
</mvc:interceptor>
</mvc:interceptors>