SpringMvc 拦截器

testInterceptor

    @RequestMapping(value="testInterceptor")
    public String testInterceptor( )  {
        System.out.println("处理请求的方法....！");
        return "success";
    }

MyInterceptor

package interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class MyInterceptor  implements HandlerInterceptor{

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        System.out.println("拦截请求");  //
        return true;//true:拦截操作之后，放行 ；false:拦截之后不放行，请求终止；
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
                           ModelAndView modelAndView) throws Exception {
        System.out.println("拦截响应");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        System.out.println("视图(jsp)被渲染完毕");
    }

}

MySecondInterceptor

package interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class MySecondInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        System.out.println("第二个拦截器，拦截请求...22222");
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
                           ModelAndView modelAndView) throws Exception {
        System.out.println("第二个拦截器，拦截响应...22222");
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        System.out.println("第二个拦截器，afterCompletion");
    }

}

springmvc.xml

    <!-- 将自己写的拦截器 配置到springmvc中（spring）；默认拦截全部请求 -->
    <mvc:interceptors>
        <mvc:interceptor>
            <!-- 指定拦截的路径,基于ant风格 -->
            <mvc:mapping path="/**"/>
            <!-- 指定拦不截的路径 -->
            <mvc:exclude-mapping path="/handler/testUpload"/>
            <bean class="interceptor.MyInterceptor"></bean>
        </mvc:interceptor>
        <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <mvc:exclude-mapping path="/handler/testUpload"/>
            <bean class="interceptor.MySecondInterceptor"></bean>
        </mvc:interceptor>
    </mvc:interceptors>

 

<br/>
<a href="handler/testInterceptor">testInterceptor</a>
<br/>

 

 

来源：https://www.cnblogs.com/kikyoqiang/p/11879203.html