配置简单的拦截器java中

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互联网集市收集整理的这篇技术教程文章主要介绍了配置简单的拦截器java中，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含2509字，纯文字阅读大概需要4分钟。

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springMVC.xml文件中====

<!-- 拦截器 -->
<mvc:interceptors>
<mvc:interceptor>
<mvc:mapping path="/**/*"/>
<mvc:exclude-mapping path="/**/fonts/*"/>
<mvc:exclude-mapping path="/**/*.css"/>
<mvc:exclude-mapping path="/**/*.js"/>
<mvc:exclude-mapping path="/**/*.png"/>
<mvc:exclude-mapping path="/**/*.gif"/>
<mvc:exclude-mapping path="/**/*.jpg"/>
<mvc:exclude-mapping path="/**/*.jpeg"/>
<!-- 登录前放行的请求 -->
<mvc:exclude-mapping path="/**/user/login.do"/>
<mvc:exclude-mapping path="/**/user/toRegister.do"/>
<mvc:exclude-mapping path="/**/code/getVerifyCode"/>
<mvc:exclude-mapping path="/**/user/findUserByPhoneNo.do"/>
<mvc:exclude-mapping path="/**/user/findAllotControlByUserNo.do"/>
<mvc:exclude-mapping path="/**/user/userLogin.do"/>
<mvc:exclude-mapping path="/**/user/toUserMainjsp.do"/>
<bean class="interceptor.InterceptorDemo"></bean>
</mvc:interceptor>
</mvc:interceptors>

java代码

package interceptor;

import org.apache.commons.lang3.StringUtils;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

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

public class InterceptorDemo implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
System.out.println("进入preHandle方法");
String user_no=httpServletRequest.getSession().getAttribute("user_no").toString();
System.out.println("进入preHandle方法user_no=="+user_no);
if(!StringUtils.isAllBlank(user_no)) {
System.out.println("session有值");
return true;
}
return false;
}

@Override
public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
String url = httpServletRequest.getServletPath();//获取当前url
String contextPath = httpServletRequest.getContextPath();//获取当前项目的根目录
System.out.println("url:"+url);
System.out.println("contextPath:"+contextPath);
System.out.println("进入postHandler 方法");
}

@Override
public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
System.out.println("进入afterCompletion 方法");

}
}

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