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 | 13,583 条评论
博客作者 ремонт холодильников bosch в москве
Когда в моей посудомоечной машине Bosch возникли проблемы, я вызвал мастера на дом в Москве. Специалист прибыл в удобное для меня время, и вскоре после диагностики приступил к ремонту. Проблема оказалась в насосе, который был успешно заменен на оригинальный. Цена ремонта была весьма приемлемой, а также мне предоставили гарантию на год, что добавило дополнительного спокойствия.
Бош-Ремонт.рф – [url=https://xn—-9sbn2afcdnw7c.xn--p1ai/кофемашин]ремонт кофемашины bosch[/url]
博客作者 prescription metformin from canada
[url=https://metoformin.online/]metformin singapore[/url]
博客作者 valtrex 500 mg tablet
[url=https://valtrexarb.online/]valtrex from india[/url]
博客作者 big pharmacy online
[url=https://bestmedsx.online/]cheap pharmacy no prescription[/url]
博客作者 happy family drugstore
[url=https://happyfamilystorerx.online/]pharmaceuticals online australia[/url]
博客作者 generic lisinopril
[url=https://olisinopril.online/]lisinopril 20 mg tabs[/url]
博客作者 azithromycin 260 mg
[url=https://ezithromycin.online/]canada azithromycin over the counter[/url]
博客作者 zithromax pill
[url=https://azithromycinmds.online/]can you buy azithromycin over the counter in australia[/url]
博客作者 synthroid 0.137
[url=https://synthroidx.com/]synthroid 50 mcg india[/url]
博客作者 thyroid synthroid
[url=https://asynthroid.com/]synthroid 20 mcg[/url]
博客作者 lisinopril 2.5 mg price
[url=https://lisinoprilgp.com/]lisinopril with out prescription[/url]
博客作者 prednisone purchase
[url=https://prednisonekx.online/]100 mg prednisone daily[/url]
博客作者 synthroid 112 mcg in india
[url=https://synthroidsl.online/]synthroid 60 mg[/url]
博客作者 best tadalafil brand
[url=https://tadalafilu.online/]best price for tadalafil[/url]
博客作者 lisinopril 10 mg for sale
[url=https://lisinoprildrl.online/]cheapest price for lisinopril india[/url]