springMvc之拦截器

设置拦截器步骤

1. 继承HandlerInterceptor接口,对接口中的方法进行实现
2. springmvc.xml配置文件配置拦截器

public class LoginInterceptor implements HandlerInterceptor {

	//控制器前执行拦截
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
		// 返回值true执行前端控制器
        return true | false;
    }
	// 控制器执行后拦截
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        
    }
	// 视图解析器执行后拦截
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        
    }

}

spring配置文件

		<mvc:interceptor>
			// 配置拦截路径
            <mvc:mapping path="/**"/>
            // 不拦截路径
            <mvc:exclude-mapping path="/users/separate/userLogin"/>
            // 自定义拦截类
            <bean class="cn.luntan.ssm.interceptor.LoginInterceptor"></bean>
        </mvc:interceptor>