完美解决axios跨域请求出错的问题

public class ProcessInterceptor implements HandlerInterceptor {

  @Override
  public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
    httpServletResponse.setHeader("Access-Control-Allow-Origin", "*");
    httpServletResponse.setHeader("Access-Control-Allow-Headers", "Content-Type,Content-Length, Authorization, Accept,X-Requested-With");
    httpServletResponse.setHeader("Access-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");
    httpServletResponse.setHeader("X-Powered-By","Jetty");

    String method= httpServletRequest.getMethod();
    if (method.equals("OPTIONS")){
      httpServletResponse.setStatus(200);
      return false;
    }
    System.out.println(method);
    return true;
  }
  @Override
  public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
  }
  @Override
  public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
  }
}

<mvc:interceptors> 
    <bean class="cn.tfzc.ssm.common.innterceptor.ProcessInterceptor"></bean> 
  </mvc:interceptors>