使用SpringMVC的拦截器interceptor解决项目路径问题

原来在jsp页面上使用的是

${pageContext.request.contextPath}

使用SpringMVC的拦截器，自定义的拦截器实现HandlerInterceptor接口，用户所有的请求都会被拦截器拦截，可以在preHandle和和postHandle中编写自己的业务逻辑

public class LoginInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
return true;
}

@Override
public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
//如果不是转发的view
if (null != modelAndView) {
if (!(modelAndView.getView() instanceof RedirectView)) {
String basePath = httpServletRequest.getContextPath();
modelAndView.addObject("basePath",basePath);
}
}
}

@Override
public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

}
89c0

}

在SpringMVC的配置文件中配置拦截器

<!--拦截器-->
<mvc:interceptors>
<bean class="com.xx.interceptors.LoginInterceptor"></bean>
</mvc:interceptors>

这样即可在页面中使用${basePath}来获取到项目路径