【Spring学习笔记-MVC-17】Spring MVC之拦截器

作者：ssslinppp

1. 拦截器简介及应用场景

2. 拦截器接口及拦截器适配器[/b]

3. 运行流程图

正常运行


中断流程

4. 程序实例

控制层：@Controller@RequestMapping(value = "/test")public class TestController { @RequestMapping(value = "/interceptor12") public String interceptor12() { System.out.println("Controller层方法-interceptor12"); return "index"; } @RequestMapping(value = "/interceptor34") public String interceptor34() { System.out.println("Controller层方法-interceptor34"); return "index"; }}
总共定义了5个拦截器

每个拦截器中只是打印消息，各拦截器类似，程序如下：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()"); }}
配置拦截器<!-- 定义拦截器 --> <mvc:interceptors> <mvc:interceptor> <!-- 拦截指定请求 --> <mvc:mapping path="/test/interceptor12" /> <bean class="com.ll.Interceptor.MyInterceptor1" /> </mvc:interceptor> <!-- 拦截所有的请求 --> <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>
特别注意拦截器的配置顺序,如下：MyInterceptor1；
MyInterceptorAll；
MyInterceptor2；
MyInterceptor3；
MyInterceptor4；
其中，MyInterceptor1和MyInterceptor2拦截interceptor12请求，MyInterceptor3和MyInterceptor4拦截interceptor34请求，MyInterceptorAll拦截所有请求。

5. 测试

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

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

6. 其他应用举例-登录检测

7. 其他

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

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