springboot 拦截器过滤token，并且返回结果

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本文介绍了一个使用SpringBoot实现的拦截器案例，该拦截器主要用于处理HTTP请求中的token验证过程。当请求头中的token不符合预设值时，拦截器会阻止请求继续执行并返回错误信息。

springboot 拦截器处理过滤token，并且返回结果

public class ParamInterceptor implements HandlerInterceptor {



    private Logger LOG = Logger.getLogger(ParamInterceptor.class);

    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {

        String token = httpServletRequest.getHeader("token");
        //LOG.info(token)
       
        if(!"aOXnjYZyn==".equals(token)){
            PrintWriter writer = null;
            httpServletResponse.setCharacterEncoding("UTF-8");
            httpServletResponse.setContentType("text/html; charset=utf-8");
            try {
                writer = httpServletResponse.getWriter();
                String error = "token信息有误";
                writer.print(error);
                return false;

            } catch (IOException e) {
                LOG.error("response error",e);
            } finally {
                if (writer != null)
                    writer.close();
            }
        }
        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 {

    }
}

添加拦截器配置

/***
* @Desciption: 拦截器
* @Date: 13:53 2018/1/15
* @return 
*/
@Configuration
public class InterceptorConfig extends WebMvcConfigurerAdapter {

    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new ParamInterceptor()).addPathPatterns("/**");
    }
}

源码：https://github.com/gcWpengfei/spring-cloud-rsa-aes-demo