Spring Boot配置拦截器及实现跨域访问的方法

public class MyInterceptor implements HandlerInterceptor {

  /**
   * preHandle在执行Controller之前执行，返回true，则继续执行Contorller
   * 返回false则请求中断。
   */
  @Override
  public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse,   o)
      throws Exception {
    //只有返回true才会继续向下执行，返回false取消当前请求 
    long startTime = System.currentTimeMillis();
    httpServletRequest.setAttribute(\"startTime\", startTime);
    return true;
  }

  /**
   * postHandle是在请求执行完，但渲染ModelAndView返回之前执行
   */
  @Override
  public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse,   o,
      ModelAndView modelAndView) throws Exception {
    long startTime = (Long) httpServletRequest.getAttribute(\"startTime\");
    long endTime = System.currentTimeMillis();
    long executeTime = endTime - startTime;
    StringBuilder sb = new StringBuilder(1000);
    SimpleDateFormat simpleDateFormat = new SimpleDateFormat(\"yyyy-MM-dd HH:mm:ss\");
    String date = simpleDateFormat.format(new Date());
    sb.append(\"-----------------------\").append(date).append(\"-------------------------------------\\n\");
    sb.append(\"URI    : \").append(httpServletRequest.getRequestURI()).append(\"\\n\");
    sb.append(\"CostTime : \").append(executeTime).append(\"ms\").append(\"\\n\");
    sb.append(\"-------------------------------------------------------------------------------\");
    System.out.println(sb.toString());
  }

  /**
   * afterCompletion是在整个请求执行完毕后执行
   */
  @Override
  public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse,
        o, Exception e) throws Exception {
  }

}

/**
 * 继承WebMvcConfigurationSupport继承并重写addInterceptor方法用于注册拦截器
 * WebMvcConfigureAdapter已经过时了！！
 */
@Configuration
public class RegisterInterceptor extends WebMvcConfigurationSupport {
  @Override
  public void addInterceptors(InterceptorRegistry registry) {
    registry.addInterceptor(new MyInterceptor()).addPathPatterns(\"/**\");
    super.addInterceptors(registry);
  }
}

  public void crossDomain(HttpServletRequest request, HttpServletResponse response) {
    response.setHeader(\"Access-Control-Allow-Origin\", request.getHeader(\"Origin\"));
    response.setHeader(\"Access-Control-Allow-Credentials\", \"true\");
  }

public boolean preHandle(HttpServletRequest request, HttpServletResponse response,   handler)
      throws Exception {
    crossDomain(request, response);
    long startTime = System.currentTimeMillis();
    request.setAttribute(\"startTime\", startTime);
    return true;
  }