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     Example to implement the HandlerInterceptorAdapter in Spring Framework  (2011-12-09)

org.springframework.web.servlet.handler
public abstract class org.springframework.web.servlet.handler.HandlerInterceptorAdapter
extends java.lang.Object


implements org.springframework.web.servlet.HandlerInterceptor
Abstract adapter class for the HandlerInterceptor interface, for simplified implementation of pre-only/post-only interceptors.

 

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.List;

public class DefaultInterceptor extends HandlerInterceptorAdapter {

    private static Logger log = LoggerFactory.getLogger(DefaultInterceptor.class);

   // Spring 3.0 does not support exclusion yet,
    private List<String>excludeList = null;

    @Override
    public boolean preHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler) throws Exception {
         String requestUri = request.getRequestURI();
        log.debug("RequestUri: " + requestUri);
        HydraPrincipal p = null;
        if (!excludeHandle(requestUri)) {
            if (something) {
                response.sendRedirect("error_page.html");
                return false;
            }

        }
            //request.getSession().setAttribute("something", "somevalue");

        }
        return super.preHandle(request, response, handler);
    }

    private boolean excludeHandle(String requestUri) {
        if (excludeList!=null) {
            for (String exclude : excludeList) {
                if (requestUri.endsWith(exclude)) {
                    return true;
                }
            }
        }
        return false;
    }

    @Override
    public void afterCompletion(HttpServletRequest request,
            HttpServletResponse response, Object handler, Exception ex)
    throws Exception { //NOSONAR this is actually an override
        // TODO Auto-generated method stub
        super.afterCompletion(request, response, handler, ex);
    }

    @Override
    public void postHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler,
            ModelAndView modelAndView) throws Exception { //NOSONAR this is actually an override
        if(!excludeHandle(request.getRequestURI())) {
            modelAndView.addObject("buildVersion", properties.getBuildVersion());
        }
        super.postHandle(request, response, handler, modelAndView);
    }

    public List<String> getExcludeList() {
        return excludeList;
    }

    public void setExcludeList(List<String> excludeList) {
        this.excludeList = excludeList;
    }
}

==================================
config.xml
==================================

<mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path = "/*.html" />
            <bean class="com.XXX.DefaultInterceptor">
                <property name="excludeList">
                    <list>
                        <value>/authtenticated.html</value>
                        <value>/accessdenied.html</value>
                    </list>
                </property>
            </bean>
        </mvc:interceptor>
    </mvc:interceptors>
      
    <bean class="org.springframework.web.servlet.i18n.AcceptHeaderLocaleResolver"/>

 

 

 


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