北大青鸟武汉宏鹏鲁广校区老师解读：Spring mvc Session拦截器

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下面向大家详细介绍spring mvc Session拦截器的使用，本文以登录为例，未登录无权限访问项目内页面，session为空时返回项目页。

代码如下：

[html]

package com.sundear.sundearemm.interceptor;

import com.sundear.sundearemm.model.User;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;

import org.springframework.web.servlet.ModelAndView;

/**

*

* @author yh

*/

public class SessionInterceptor implements HandlerInterceptor {

private Logger logger = Logger.getLogger(SessionInterceptor.class.getName());

@Override

public boolean preHandle(HttpServletRequest hsr, HttpServletResponse hsr1, Object o) throws Exception {

User user=(User) hsr.getSession().getAttribute("LoginUser");

if(user==null){

logger.log(Level.INFO, "user not login");

hsr1.sendRedirect("/SundearEmm");

return false;

}

return true;

}

@Override

public void postHandle(HttpServletRequest hsr, HttpServletResponse hsr1, Object o, ModelAndView mav) throws Exception {

}

@Override

public void afterCompletion(HttpServletRequest hsr, HttpServletResponse hsr1, Object o, Exception excptn) throws Exception {

}

}

package com.sundear.sundearemm.interceptor;

import com.sundear.sundearemm.model.User;

import java.util.logging.Level;

import java.util.logging.Logger;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;

import org.springframework.web.servlet.ModelAndView;

/**

*

* @author yh

*/

public class SessionInterceptor implements HandlerInterceptor {

private Logger logger = Logger.getLogger(SessionInterceptor.class.getName());

@Override

public boolean preHandle(HttpServletRequest hsr, HttpServletResponse hsr1, Object o) throws Exception {

User user=(User) hsr.getSession().getAttribute("LoginUser");

if(user==null){

logger.log(Level.INFO, "user not login");

hsr1.sendRedirect("/SundearEmm");

return false;

}

return true;

}

@Override

public void postHandle(HttpServletRequest hsr, HttpServletResponse hsr1, Object o, ModelAndView mav) throws Exception {

}

@Override

public void afterCompletion(HttpServletRequest hsr, HttpServletResponse hsr1, Object o, Exception excptn) throws Exception {

}

}

这些还不够，我们还需要修改spring mvc的配置文件dispatcher-servlet.xml,加入拦截器代码如下：

[html]

<!-- interceptors -->

<mvc:interceptors >

<mvc:interceptor>

<mvc:mapping path="/group/*" />

<mvc:mapping path="/user/*"/>

<mvc:mapping path="/subscribe/*"/>

<mvc:mapping path="/recipient/*"/>

<mvc:mapping path="/mail/*"/>

<bean class="com.sundear.sundearemm.interceptor.SessionInterceptor"></bean>

</mvc:interceptor>

</mvc:interceptors>

<!-- interceptors -->

<mvc:interceptors >

<mvc:interceptor>

<mvc:mapping path="/group/*" />

<mvc:mapping path="/user/*"/>

<mvc:mapping path="/subscribe/*"/>

<mvc:mapping path="/recipient/*"/>

<mvc:mapping path="/mail/*"/>

<bean class="com.sundear.sundearemm.interceptor.SessionInterceptor"></bean>

</mvc:interceptor>

</mvc:interceptors>如有访客不明白的可以给我留言，我会给大家满意的解决方法……

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本文标题：Java培训：Spring mvc Session拦截器，责任编辑：宏鹏，来源：武汉北大青鸟鲁广校区栏目，于2013-04-20 09:29:28发布于北大青鸟鲁广校区。北大青鸟武汉宏鹏鲁广校区老师解读：Spring mvc Session拦截器