SpringMVC使用拦截器

标签：spring   springmvc   

拦截器也算得上是spring中的一大特色，即使没用过spring的拦截器至少也用过struts2的拦截器，拦截器大多数情况都是用来做权限的控制的，极少情况下用来初始化资源或释放资源。springmvc当然也可以直接使用拦截器，而且使用起来也特别简单。

一  springmvc的拦截器实现方式

springmvc实现拦截器主要有以下2种方式：

1 实现HandlerInterceptor接口

package com.sxt.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;


public class MyInterceptor implements HandlerInterceptor {

	
	public void afterCompletion(HttpServletRequest request,	HttpServletResponse response, Object handler, Exception ex)	throws Exception {
		System.out.println("最后执行！！！一般用于释放资源！");
		
	}

	
	public void postHandle(HttpServletRequest request,HttpServletResponse response, Object handler,	ModelAndView modelAndView) throws Exception {
		System.out.println("Action执行之后，生成视图之前执行！");
	}

	
	public boolean preHandle(HttpServletRequest request,HttpServletResponse response, Object handler) throws Exception {
		System.out.println("action之前执行！！");
		return true;  
	}

}

package com.sxt.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;


public class MyInterceptor2 extends HandlerInterceptorAdapter {

	@Override
	public boolean preHandle(HttpServletRequest request,HttpServletResponse response, Object handler) throws Exception {
		System.out.println("MyInterceptor2.preHandle()");
		return true;  
	}

}

二  springmvc拦截器的配置

<mvc:interceptors>
	<bean class="com.sxt.interceptor.MyInterceptor"></bean> <!-- 拦截所有springmvc的url！ -->
	<mvc:interceptor>
		<mvc:mapping path="/user.do" />
		<!--<mvc:mapping path="/test/*" />-->
		<bean class="com.sxt.interceptor.MyInterceptor2"></bean>
	</mvc:interceptor>
</mvc:interceptors>

SpringMVC使用拦截器

标签：spring   springmvc   

原文地址：http://blog.csdn.net/walkcode/article/details/41966803