自定义Zuul过滤器实现登陆鉴权

1.新建一个filter‘包

2.新建一个类，实现ZuulFilter，重写里面的方法

3.在顶部类添加注解，@Component，让Spring扫描

/**
 * 登陆过滤器
 */
@Component
public class LoginFilter extends ZuulFilter {
    @Override
    public String filterType() {  //前置过滤器
        return PRE_TYPE;
    }

    @Override
    public int filterOrder() { //过滤器顺序，越小越先执行
        return 3;
    }

    @Override
    public boolean shouldFilter() { //过滤器是否生效
        RequestContext requestContext = RequestContext.getCurrentContext();
        HttpServletRequest request = requestContext.getRequest();
        System.out.println(request.getRequestURI());
        System.out.println(request.getRequestURL());
        if ("/apizuul/order/api/v1/order/save".equalsIgnoreCase(request.getRequestURI())){ //拦截
            return true;
        }
        return false;
    }

    /**
     * 业务逻辑
     * @return
     * @throws ZuulException
     */
    @Override
    public Object run() throws ZuulException {
        System.out.println("拦截...");
        RequestContext requestContext = RequestContext.getCurrentContext();
        HttpServletRequest request = requestContext.getRequest();
        String token = request.getHeader("token");
        if (StringUtils.isBlank(token)){
            token = request.getParameter("token");
        }
        //登陆校验逻辑  jwt生成token
        if (StringUtils.isBlank(token)){
            requestContext.setSendZuulResponse(false); //不会往下执行
            requestContext.setResponseStatusCode(HttpStatus.UNAUTHORIZED.value());
        }
        return null;
    }