SpringMVC学习（四）

拦截器

拦截器：

1.实现HandlerInterceptor接口

public class myinterceptor1 implements HandlerInterceptor {

	@Override
	public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3)
			throws Exception {
		// 执行Handler完成之后执行
		System.out.println("执行Handler完成之后执行");
	}

	@Override
	public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3)
			throws Exception {
		// 处理器执行之后，返回ModelAndView之前执行
		System.out.println("处理器执行之后，返回ModelAndView之前执行");
	}

	@Override
	public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2) throws Exception {
		// 处理器执行之前
		System.out.println("这是在处理器执行之前");
		return true;
	}

}

2.springmvc.xml配置

		<mvc:interceptors>
			<mvc:interceptor>
				<mvc:mapping path="/**"/><!--拦截所有url访问 -->
				<bean class="com.test.interceptor.myinterceptor1"></bean>
			</mvc:interceptor>
		</mvc:interceptors> 		
 		

这样配置就可以了