拦截器
拦截器是SpringMVC框架自己的,只用SpringMVC才能使用
拦截器只会拦截访问的控制方法,静态资源是不会拦截的
定义拦截器
实现HandlerInterceptor
其实只要使用preHandle就可以了,他返回true才执行,否则不执行
比如我们就可以在这里实现登陆请求
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
| package com.onlineStore.interceptor;
import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse;
public class MyInterceptor implements HandlerInterceptor { @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { return true; }
@Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
}
@Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
} }
|
文件上传和下载
MultipartResolver
1 2 3 4 5 6 7 8
| <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="maxUploadSize" value="17367648787"></property> <property name="defaultEncoding" value="UTF-8"></property> </bean>
|
结束
最后更新时间:
这里可以写作者留言,标签和 hexo 中所有变量及辅助函数等均可调用,示例:
<%- page.permalink.replace(/index\.html$/, '') %>