HttpInterceptor.java

package com.app.mvc.common;

import com.app.mvc.acl.util.RequestHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

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

/**
 * Created by Gaven8 on 16/7/12.
 */
@Slf4j
public class HttpInterceptor extends HandlerInterceptorAdapter {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        // 正常返回时, 显式回收threadLocal里的信息
        removeThreadLocalInfo();

    }

    @Override
    public void afterCompletion(
            HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        // 出异常时, 显式回收threadLocal里的信息
        removeThreadLocalInfo();
    }

    private void removeThreadLocalInfo() {
        RequestHolder.remove();
    }
}