学习SpringMVC(二十三)之拦截器相关

<span style="font-size:24px;">package com.cgf.springmvc.interceptors;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
public class MySecondInterceptors implements HandlerInterceptor{
<span style="color:#ff0000;">/**
* 在渲染视图之后被调用；
* 可以用来释放资源
*/</span>
public void afterCompletion(HttpServletRequest arg0,
HttpServletResponse arg1, Object arg2, Exception arg3)
throws Exception {
// TODO Auto-generated method stub
System.out.println("MySecondInterceptors afterCompletion");
}
<span style="color:#ff0000;">/**
* 该方法在目标方法调用之后，渲染视图之前被调用；
* 可以对请求域中的属性或视图做出修改
*
*/</span>
public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
Object arg2, ModelAndView arg3) throws Exception {
// TODO Auto-generated method stub
System.out.println("MySecondInterceptors postHandle");
}
<span style="color:#ff0000;">/**
* 可以考虑作权限，日志，事务等等
* 该方法在目标方法调用之前被调用；
* 若返回TURE,则继续调用后续的拦截器和目标方法
* 若返回FALSE,则不会调用后续的拦截器和目标方法
*
*/</span>
public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,
Object arg2) throws Exception {
// TODO Auto-generated method stub
System.out.println("MySecondInterceptors preHandle");
return true;
}

}
</span>

<span style="font-size:24px;"><!-- 装配拦截器 -->
<mvc:interceptors>
<bean class="com.cgf.springmvc.interceptors.MyInterceptors"></bean>
<mvc:interceptor>
<mvc:mapping path="/springmvc/testFileUpload"/>
<bean class="com.cgf.springmvc.interceptors.MySecondInterceptors"></bean>
</mvc:interceptor>
<bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor"></bean>
</mvc:interceptors></span>