作者：ssslinppp ? ? ?

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1. 攔截器簡介及應用場景

2. 攔截器接口及攔截器適配器

3. 運行流程圖

正常運行

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中斷流程

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4. 程序實例

控制層：

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@Controller@RequestMapping(value?=?"/test")public?class?TestController?{????????@RequestMapping(value?=?"/interceptor12")????public?String?interceptor12()?{????????System.out.println("Controller層方法-interceptor12");????????return?"index";????}????????@RequestMapping(value?=?"/interceptor34")????public?String?interceptor34()?{????????System.out.println("Controller層方法-interceptor34");????????return?"index";????}}??

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總共定義了5個攔截器
每個攔截器中只是打印消息，各攔截器類似，程序如下：

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public?class?MyInterceptor1?extends?HandlerInterceptorAdapter?{????@Override????public?boolean?preHandle(HttpServletRequest?request,????????????HttpServletResponse?response,?Object?handler)?throws?Exception?{????????System.out.println("MyInterceptor1-preHandle()");????????return?true;????}????@Override????public?void?postHandle(HttpServletRequest?request,????????????HttpServletResponse?response,?Object?o,?ModelAndView?mav)????????????throws?Exception?{????????System.out.println("MyInterceptor1-postHandle()");????}????@Override????public?void?afterCompletion(HttpServletRequest?request,????????????HttpServletResponse?response,?Object?o,?Exception?excptn)????????????throws?Exception?{????????System.out.println("MyInterceptor1-afterCompletion()");????}}??

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配置攔截器

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<!--?定義攔截器?-->????<mvc:interceptors>????????<mvc:interceptor>????????????<!--?攔截指定請求?-->????????????<mvc:mapping?path="/test/interceptor12"?/>????????????<bean?class="com.ll.Interceptor.MyInterceptor1"?/>????????</mvc:interceptor>????????????????<!--?攔截所有的請求?-->????????<mvc:interceptor>????????????<mvc:mapping?path="/test/*"?/>????????????<bean?class="com.ll.Interceptor.MyInterceptorAll"?/>????????</mvc:interceptor>????????????????<mvc:interceptor>????????????<mvc:mapping?path="/test/interceptor12"?/>????????????<bean?class="com.ll.Interceptor.MyInterceptor2"?/>????????</mvc:interceptor>????????????????<mvc:interceptor>????????????<mvc:mapping?path="/test/interceptor34"?/>????????????<bean?class="com.ll.Interceptor.MyInterceptor3"?/>????????</mvc:interceptor>????????????????<mvc:interceptor>????????????<mvc:mapping?path="/test/interceptor34"?/>????????????<bean?class="com.ll.Interceptor.MyInterceptor4"?/>????????</mvc:interceptor>????</mvc:interceptors>???

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特別注意攔截器的配置順序,如下：

MyInterceptor1；

MyInterceptorAll；

MyInterceptor2；

MyInterceptor3；

MyInterceptor4；

其中，MyInterceptor1和MyInterceptor2攔截interceptor12請求，MyInterceptor3和MyInterceptor4攔截interceptor34請求，MyInterceptorAll攔截所有請求。

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5. 測試

http://localhost:8080/SpringMVCTest/test/interceptor12?

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http://localhost:8080/SpringMVCTest/test/interceptor34?

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6. 其他應用舉例-登錄檢測

7. 其他

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博客：http://www.cnblogs.com/ssslinppp http://blog.sina.com.cn/spstudy淘寶-代做畢設：http://shop110473970.taobao.com/?spm=a230r.7195193.1997079397.42.AvYpGW http://shop125186102.taobao.com/?spm=a1z10.1-c.0.0.SsuajD


來自為知筆記(Wiz)

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轉載于:https://www.cnblogs.com/ssslinppp/p/4613273.html

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