package cn.itcsdn.interceptor;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/*
* 自定义拦截器
* 继承实现:implements HandlerInterceptor
* 
*/
public class LoginInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("预处理方法:preHandle方法");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("后处理方法:postHandle方法");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("完成后处理方法afterCompletion方法");
    }
}

    <mvc:interceptors>
    可以多配置
        <mvc:interceptor>
        	拦截的路径
            <mvc:mapping path="/csnd/**"/>
            自定义拦截器的全限定类名
            <bean class="cn.itcsdn.interceptor.LoginInterceptor"/>
        </mvc:interceptor>
    </mvc:interceptors>

  @RequestMapping("/csnd/cjz")
    @ResponseBody
    public String text(Integer id){
        System.out.println("进入了text方法");
        return id+"" ;
    }