onlyring的文档库 2013-04-26
在用springmvc3时经常会碰到登录拦截这种需求,最新想到的办法是用拦截器,但在用拦截器时想让某些静态文件和某些url不需要拦截,实现如下:
spring-servlet.xml:
<mvc:resources mapping="/resources/**" location="/resources/" cache-period="31556926"/> <mvc:interceptors> <mvc:interceptor> <mvc:mapping path="/**"/> <bean class="com.xxx.interceptor.UserLoginCheckInterceptor"> <property name="excludeUrlPatterns"> <list> <value>/login/*</value> <value>/resources/**</value> </list> </property> </bean> </mvc:interceptor> </mvc:interceptors>
UserLoginCheckInterceptor.java
public class UserLoginCheckInterceptor extends HandlerInterceptorAdapter { private List<String> excludeUrlPatterns; private PathMatcher pathMatcher = new AntPathMatcher(); public void setExcludeUrlPatterns(List<String> excludeUrlPatterns) { this.excludeUrlPatterns = excludeUrlPatterns; } @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { String servletPath = request.getServletPath(); for(String urlPattern : excludeUrlPatterns){ if(pathMatcher.match(urlPattern,servletPath)){ return true; } } HttpSession session = request.getSession(); if(!Constants.CORRECT.equals(session.getAttribute(Constants.USER_NAME))){ response.sendRedirect(request.getContextPath() +"/login.jsp"); return false; } return true; } }
说明:
在配置文件中可以写不被拦截url pattern,写法和requestMapping一样,此处用到了AntPathMatcher类,springmvc中url映射本身也是用的此类,这里只是借用一下,即可完成urlpattern.