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网站建设怎么做?,网站备案级别,如果想看网站的收费电影应该怎么做,重庆提供行业网站建站报价由于项目需要使用拦截器对请求参数进行操作，可是请求流只能操作一次，导致后面方法不能再获取流了。新建SpringBoot项目 1. 新建拦截器WebConfig.java /*** date: 2023/2/6 11:21* author: zhouzhaodong* description:*/ Configuration public class W…

由于项目需要使用拦截器对请求参数进行操作，可是请求流只能操作一次，导致后面方法不能再获取流了。

新建SpringBoot项目

1. 新建拦截器WebConfig.java

/*** @date: 2023/2/6 11:21* @author: zhouzhaodong* @description:*/
@Configuration
public class WebConfig implements WebMvcConfigurer {/*** 添加Web项目的拦截器*/@Overridepublic void addInterceptors(InterceptorRegistry registry) {// 对所有访问路径，都通过MyInterceptor类型的拦截器进行拦截// 放行登录页，登陆操作，静态资源registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**").excludePathPatterns("/", "/login", "/index.html", "/user/login", "/css/**", "/images/**", "/js/**", "/fonts/**");}
}

2. 获取请求参数并处理逻辑

/*** @date: 2023/2/6 12:46* @author: zhouzhaodong* @description: 获取请求参数并处理*/
public class RequestWrapper extends HttpServletRequestWrapper {private final Logger logger = LoggerFactory.getLogger(RequestWrapper.class);private final byte[] body;public RequestWrapper(HttpServletRequest request) {super(request);String sessionStream = getBodyString(request);body = sessionStream.getBytes(StandardCharsets.UTF_8);}public String getBodyString() {return new String(body, StandardCharsets.UTF_8);}/*** @date: 2023/2/6 12:46* @author: zhouzhaodong* @description: 获取请求Body*/public String getBodyString(final ServletRequest request) {StringBuilder sb = new StringBuilder();InputStream inputStream = null;BufferedReader reader = null;try {inputStream = cloneInputStream(request.getInputStream());reader = new BufferedReader(new InputStreamReader(inputStream, StandardCharsets.UTF_8));String line = "";while ((line = reader.readLine()) != null) {sb.append(line);}} catch (IOException e) {e.printStackTrace();} finally {if (inputStream != null) {try {inputStream.close();} catch (IOException e) {e.printStackTrace();}}if (reader != null) {try {reader.close();} catch (IOException e) {e.printStackTrace();}}}logger.info("获取body请求参数:" + sb);return sb.toString();}/*** @date: 2023/2/6 12:46* @author: zhouzhaodong* @description: 复制输入流*/public InputStream cloneInputStream(ServletInputStream inputStream) {ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int len;try {while ((len = inputStream.read(buffer)) > -1) {byteArrayOutputStream.write(buffer, 0, len);}byteArrayOutputStream.flush();} catch (IOException e) {e.printStackTrace();}return new ByteArrayInputStream(byteArrayOutputStream.toByteArray());}@Overridepublic BufferedReader getReader() {return new BufferedReader(new InputStreamReader(getInputStream()));}@Overridepublic ServletInputStream getInputStream() {final ByteArrayInputStream bais = new ByteArrayInputStream(body);return new ServletInputStream() {@Overridepublic int read() {return bais.read();}@Overridepublic boolean isFinished() {return false;}@Overridepublic boolean isReady() {return false;}@Overridepublic void setReadListener(ReadListener readListener) {}};}
}

3. 实现HandlerInterceptor接口

/*** @date: 2023/2/6 11:19* @author: zhouzhaodong* @description: 实现HandlerInterceptor接口*/public class MyInterceptor implements HandlerInterceptor {private final Logger logger = LoggerFactory.getLogger(MyInterceptor.class);/*** @date: 2023/2/6 11:19* @author: zhouzhaodong* @description: 访问控制器方法前执行*/@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {logger.info("================进入拦截器======================");logger.info(new Date() + "--preHandle:" + request.getRequestURL());logger.info("***************************【RequestBeginning】***************************");logger.info("----------------StartProcessingRequest----------------");try {long currentTime = System.currentTimeMillis();SimpleDateFormat formatter = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss");Date date = new Date(currentTime);logger.info("CurrentTime: {}", formatter.format(date));logger.info("ResponseTime: {}", (System.currentTimeMillis() - currentTime) + "ms");String requestUrl = request.getRequestURI();logger.info("RequestURL: {} ", requestUrl);logger.info("GetMethod: {}", handler);String method = request.getMethod();logger.info("Method: {}", method);//获取请求参数RequestWrapper requestWrapper = new RequestWrapper(request);//这里getBodyString()方法无参数logger.info("RequestBody: {}", requestWrapper.getBodyString());} catch (Exception e) {logger.error("MVC业务处理-拦截器异常：", e);}logger.info("-------------------------End-------------------------");return true;}/*** @date: 2023/2/6 12:46* @author: zhouzhaodong* @description: 访问控制器方法后执行*/@Overridepublic void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {logger.info(new Date() + "--postHandle:" + request.getRequestURL());}/*** @date: 2023/2/6 12:46* @author: zhouzhaodong* @description: postHandle方法执行完成后执行，一般用于释放资源*/@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {logger.info(new Date() + "--afterCompletion:" + request.getRequestURL());}
}

4. application.yml

spring:main:# 当出现相同名字的类进行注册时，准许覆盖注册allow-bean-definition-overriding: true

5. 启动类添加@ServletComponentScan注解

6. 新建TestController.java

/*** @date: 2023/2/6 12:24* @author: zhouzhaodong* @description: 测试*/
@RestController
public class TestController {@PostMapping("/one/abc")public String abc(@RequestBody User user){return user.getName();}
}

7. 不进行处理先测试看结果

请求结果：
在这里插入图片描述

控制台输出：
在这里插入图片描述

可以看出，流被读取了一次然后后台就获取不到了。

8. 通过过滤器获取参数然后传到后面程序中

/*** @date: 2023/2/6 12:47* @author: zhouzhaodong* @description:*/
@Component
@WebFilter(urlPatterns = "/*", filterName = "channelFilter")
public class ChannelFilter implements Filter {private final Logger logger = LoggerFactory.getLogger(ChannelFilter.class);@Overridepublic void init(FilterConfig filterConfig) {}@Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {logger.info("================进入过滤器======================");// 防止流读取一次后就没有了, 所以需要将流继续写出去HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest;RequestWrapper requestWrapper = new RequestWrapper(httpServletRequest);filterChain.doFilter(requestWrapper, servletResponse);}@Overridepublic void destroy() {}
}