添加自定义注解
package org.book.configuration.aop; import java.lang.annotation.*; @Documented @Target(ElementType.METHOD) @Retention(RetentionPolicy.RUNTIME) public @interface NoCheckLogin { }
创建一个SpringMvcHandler 类,继承HandlerInterceptorAdapter
package org.book.configuration.Handler; import com.alibaba.fastjson.JSONObject; import lombok.extern.slf4j.Slf4j; import org.book.common.JsonResult; import org.book.configuration.aop.NoCheckLogin; import org.springframework.web.method.HandlerMethod; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.handler.HandlerInterceptorAdapter; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.PrintWriter; import java.lang.reflect.Method; @Slf4j public class SpringMvcHandler extends HandlerInterceptorAdapter { public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3) throws Exception { } public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3) throws Exception { } public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { HandlerMethod hm = null; Method method = null; if(handler instanceof HandlerMethod) { hm = (HandlerMethod) handler; method = hm.getMethod();// 获取方法 } else { return true; } // 该方法是否添加 允许未登录访问注解 if (method !=null && method.isAnnotationPresent(NoCheckLogin.class)) { // 不拦截 return true; } String name = (String) request.getSession().getAttribute("user"); if (name != null) { return true; } else { response.setCharacterEncoding("UTF-8"); response.setContentType("application/json; charset=utf-8"); PrintWriter out = null; try { out = response.getWriter(); out.append(new JSONObject().toJSONString(JsonResult.renderFail("用户未登录")) ); }catch (Exception e){ out = response.getWriter(); out.append(new JSONObject().toJSONString(JsonResult.renderError("后台出错"))); log.info(e.getStackTrace().toString()); } return false; } } }
被@NoLoginCheck注解的方法不会被拦截在springmvc配置文件配置拦截路径和排除路径
<mvc:interceptors> <mvc:interceptor> <mvc:mapping path="/**"/> <mvc:mapping path="/"/> <mvc:mapping path="/index.jsp"/> <mvc:exclude-mapping path="/assets/**"/> <mvc:exclude-mapping path="/images/**"/> <bean class="org.book.configuration.Handler.SpringMvcHandler"></bean> </mvc:interceptor> </mvc:interceptors>
1)预处理preHandle()方法
用户发送请求时,先执行preHandle()方法。会先按照顺序执行所有拦截器的preHandle方法,一直遇到return false为止,比如第二个preHandle方法是return false,则第三个以及以后所有拦截器都不会执行。若都是return true,则执行用户请求的url方法。
2)后处理postHandle()
方法调用了Service并返回ModelAndView,但未进行页面渲染,可以在这里继续修改ModelAndView
3)返回处理afterCompletion()
方法已经渲染了页面,在afterCompletion中,可以根据ex是否为null判断是否发生了异常,进行日志记录。注:一般使用preHandle这个拦截器进行预处理,对url进行请求拦截
Comments | 13,518 条评论
博客作者 kugoo_suKr
Электросамокат Kugoo G1: динамичность и удобство в одном устройстве
kugoo g1 18.2 [url=https://www.kugo-g1.ru]https://www.kugo-g1.ru[/url] .
博客作者 sale
[url=https://baclofem.com/]baclofen online pharmacy[/url]
博客作者 cheap
[url=https://adfinasterid.online/]pharmacy propecia[/url]
博客作者 prescription
[url=https://acyclovirmc.com/]acyclovir generic drug[/url]
博客作者 price
[url=https://acyclovirmc.com/]acyclovir 300 mg[/url]
博客作者 pills
[url=https://acyclovirmc.online/]zovirax cream over the counter uk[/url]
博客作者 azithromycin pills 250 mg
[url=https://azithromycinhq.com/]azithromycin best price[/url]
博客作者 кредит всем онлайн
Не знаете, где быстро получить деньги? Наш телеграм-канал [url=https://t.me/s/MFO_dayt_vsem/]займы где одобряют всем форум[/url] создан для вас! Мы собрали лучшие предложения от МФО, которые дают деньги без отказов и проверки кредитной истории. Получите первый займ под 0% до 15 000 рублей за 10 минут! В канале представлены списки новых МФО 2024 года, выдающих мгновенные микрозаймы даже с плохой кредитной историей и просрочками. Подпишитесь и получите деньги быстро и без проблем!
博客作者 pills
[url=https://odiflucan.online/]diflucan brand name 300mg[/url]
博客作者 price
[url=https://tadacip.store/]tadacip best price[/url]
博客作者 marsbahis
After all, what a great site and informative posts, I will upload inbound link – bookmark this web site? Regards, Reader.Seo Paketi Skype: ByuMuT@KRaLBenim.Com –– live:by_umut
博客作者 xslot Giriş
Thank you great posting about essential oil. Hello Administ . Seo Paketi Skype: ByuMuT@KRaLBenim.Com –– live:by_umut
博客作者 xslot
Hi, just required you to know I he added your site to my Google bookmarks due to your layout. But seriously, I believe your internet site has 1 in the freshest theme I??ve came across.Seo Paketi Skype: ByuMuT@KRaLBenim.Com –– live:by_umut
博客作者 xslot Giriş
Thank you great post. Hello Administ .Seo Paketi Skype: ByuMuT@KRaLBenim.Com –– live:by_umut
博客作者 xslot
Everything is very open and very clear explanation of issues. was truly information.Seo Paketi Skype: ByuMuT@KRaLBenim.Com –– live:by_umut