ssm--之拦截器

最新推荐文章于 2025-06-05 14:22:28 发布

村南头的小伙子

最新推荐文章于 2025-06-05 14:22:28 发布

阅读量266

点赞数 1

CC 4.0 BY-SA版权

本文链接：https://blog.youkuaiyun.com/qq_38569524/article/details/73928232

1.在配置文件中引入拦截器

<!-- 配置拦截器 -->  
    <mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/**"/>
                <bean class="com.bawei.filter.StringmvcFilter"></bean>
        </mvc:interceptor>
    </mvc:interceptors>

2.写一个类，实现HandlerInterceptor接口
在preHandle中进行各种业务判断
public class MyIntercepter implements HandlerInterceptor {

@Override
public void afterCompletion(HttpServletRequest arg0,
        HttpServletResponse arg1, Object arg2, Exception arg3)
        throws Exception {
    // TODO Auto-generated method stub


}

@Override
public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
        Object arg2, ModelAndView arg3) throws Exception {
    // TODO Auto-generated method stub

}

@Override
public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,
        Object arg2) throws Exception {

        String name = (String) arg0.getSession().getAttribute("name");
        System.out.println("++++++++++++"+name);
        if(name==null||name==""){
            arg1.sendRedirect(arg0.getContextPath()+"/login.jsp");
            return false;
        }
        return true;


}