今天在写一个接口项目的时候，我们提供给别人的接口数据，我们所有的接口都是要从header中获取一个凭证，

这个凭证需要从数据库中查询一些数据，然后给接下来的controller中使用，解决方案如下：

1、AuthInterceptor.java 拦截器

@Component
public class AuthInterceptor extends HandlerInterceptorAdapter {

public final Logger logger = LoggerFactory.getLogger(AuthInterceptor.class);



@Value(value = "${spring.profiles.active}")
    String springProfilesActive;

@Autowired
PartnerService partnerService;

@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String partnerNo = request.getHeader("partnerNo");
response.setCharacterEncoding("UTF-8");
        if(StringUtil.isNil(partnerNo)){
            ResponseHelper.write(response, JsonUtil.beanToJson(WebUtil.tokenError("partnerNo不能为空")));
            return false;
}else{
            PartnerDto partnerDto=partnerService.getPartner(partnerNo);
            if(partnerDto==null){
                ResponseHelper.write(response, JsonUtil.beanToJson(WebUtil.tokenError("合作伙伴信息不存在")));
}
            PartnerThreadLocal.set(partnerDto);

}
        request.setAttribute("startTime",System.currentTimeMillis());
        return true;
}

private boolean validUrl(HttpServletRequest request) {
logger.info("================>>>>springProfilesActive={}",springProfilesActive);
        if (StringUtil.isBlank(springProfilesActive) || !"dev".equals(springProfilesActive)){
return true;
}
        String reqUrl = request.getRequestURI();
        for (int i = 0; i < WebConfig.globalFunction.length; i++) {
            String url = WebConfig.globalFunction[i];
            if (reqUrl.contains(url)){
return false;
}
        }
return true;
}

@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
super.postHandle(request, response, handler, modelAndView);
//long endTime = System.currentTimeMillis();
        //long startTime = (Long)request.getAttribute("startTime");
        //long executeTime = endTime - startTime;
        //logger.debug("[" + handler + "] \n 执行耗时 : " + executeTime + "ms");
}

@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
//本次请求完成，清空合作伙伴信息
PartnerThreadLocal.set(null);
        super.afterCompletion(request, response, handler, ex);
}
}

2、PartnerThreadLocal.java 

package com.kaishi.kscs.api.auth.bean;

import com.kaishi.kscs.admin.dto.PartnerDto;

/**
 * 合作伙伴数据缓存（仅当次请求有效）
* @author dengjihai
 * @create 2018-06-06
 **/
public class PartnerThreadLocal {

private PartnerThreadLocal(){

    }

private static final ThreadLocal<PartnerDto> partnerDtoThreadLocal = new ThreadLocal<>();


    public static void set(PartnerDto partnerDto){
partnerDtoThreadLocal.set(partnerDto);
}

public static PartnerDto get(){
return partnerDtoThreadLocal.get();
}


}