Spring Boot配置拦截器及实现跨域访问的方法

public class myinterceptor implements handlerinterceptor {

   /**

    * prehandle在执行controller之前执行，返回true，则继续执行contorller

    * 返回false则请求中断。

    */

   @override

   public boolean prehandle(httpservletrequest httpservletrequest, httpservletresponse httpservletresponse, object o)

       throws exception {

     //只有返回true才会继续向下执行，返回false取消当前请求

     long starttime = system.currenttimemillis();

     httpservletrequest.setattribute( "starttime" , starttime);

     return true ;

   }

   /**

    * posthandle是在请求执行完，但渲染modelandview返回之前执行

    */

   @override

   public void posthandle(httpservletrequest httpservletrequest, httpservletresponse httpservletresponse, object o,

       modelandview modelandview) throws exception {

     long starttime = ( long ) httpservletrequest.getattribute( "starttime" );

     long endtime = system.currenttimemillis();

     long executetime = endtime - starttime;

     stringbuilder sb = new stringbuilder( 1000 );

     simpledateformat simpledateformat = new simpledateformat( "yyyy-mm-dd hh:mm:ss" );

     string date = simpledateformat.format( new date());

     sb.append( "-----------------------" ).append(date).append( "-------------------------------------\n" );

     sb.append( "uri    : " ).append(httpservletrequest.getrequesturi()).append( "\n" );

     sb.append( "costtime : " ).append(executetime).append( "ms" ).append( "\n" );

     sb.append( "-------------------------------------------------------------------------------" );

     system.out.println(sb.tostring());

   }

   /**

    * aftercompletion是在整个请求执行完毕后执行

    */

   @override

   public void aftercompletion(httpservletrequest httpservletrequest, httpservletresponse httpservletresponse,

       object o, exception e) throws exception {

   }

}

/**

  * 继承webmvcconfigurationsupport继承并重写addinterceptor方法用于注册拦截器

  * webmvcconfigureadapter已经过时了！！

  */

@configuration

public class registerinterceptor extends webmvcconfigurationsupport {

   @override

   public void addinterceptors(interceptorregistry registry) {

     registry.addinterceptor( new myinterceptor()).addpathpatterns( "/**" );

     super .addinterceptors(registry);

   }

}

public void crossdomain(httpservletrequest request, httpservletresponse response) {

   response.setheader( "access-control-allow-origin" , request.getheader( "origin" ));

   response.setheader( "access-control-allow-credentials" , "true" );

}

public boolean prehandle(httpservletrequest request, httpservletresponse response, object handler)

       throws exception {

     crossdomain(request, response);

     long starttime = system.currenttimemillis();

     request.setattribute( "starttime" , starttime);

     return true ;

   }