一个服务器可以做多个网站吗,建设网站模板,免费搭建商城网站,随县住房和城乡建设局网站一、前言 在实际开发中#xff0c;有时候我们可能使用springboot注册web组件#xff0c;实现某些功能#xff0c;比如我们需要生成一些api来提供对外的服务#xff0c;而对应的路径其实是不固定的#xff0c;那么这种情况下#xff0c;其实是可以通过这种方式来注册web组…一、前言 在实际开发中有时候我们可能使用springboot注册web组件实现某些功能比如我们需要生成一些api来提供对外的服务而对应的路径其实是不固定的那么这种情况下其实是可以通过这种方式来注册web组件的。
二、如何实现 1.使用SpringBoot注解加继承HttpServet类实现注册Servlet组件。
WebServlet(/api)
public class APIServlet extends HttpServlet {Overrideprotected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {log.debug(servlet execute);String servletPath request.getRequestURI();servletPath servletPath.substring(apiContext.length() 2);PrintWriter out null;try {out response.getWriter();ResponseDto responseDto process(servletPath, request, response);out.append(JSON.toJSONString(responseDto));} catch (Exception e) {response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);out.append(JSON.toJSONString(ResponseDto.fail(e.toString())));log.error(e.toString(), e);} finally {if (out ! null)out.close();}}Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException {doGet(req, resp);}public ResponseDto process(String path, HttpServletRequest request, HttpServletResponse response) {System.out.println(请求处理);ResponseDto dto new ResponseDto();return dto;}
}2.通过继承HttpServet类加配置类来进行注册。
public class APIServlet extends HttpServlet {Overrideprotected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {log.debug(servlet execute);String servletPath request.getRequestURI();servletPath servletPath.substring(apiContext.length() 2);PrintWriter out null;try {out response.getWriter();ResponseDto responseDto process(servletPath, request, response);out.append(JSON.toJSONString(responseDto));} catch (Exception e) {response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);out.append(JSON.toJSONString(ResponseDto.fail(e.toString())));log.error(e.toString(), e);} finally {if (out ! null)out.close();}}
}新建一个配置类将该Servlet加载到Spring容器中配置类代码如下
Slf4j
Configuration
public class ServletConfig {Value(${dbapi.api.context})String apiContext;Autowiredprivate APIServlet apiServlet;Beanpublic ServletRegistrationBean getServletRegistrationBean() {String format String.format(/%s/*, apiContext);ServletRegistrationBean bean new ServletRegistrationBean(apiServlet);bean.addUrlMappings(format);log.info(regist APIServlet servelet for {} urlMappings,format);return bean;}
}两种注册方式都是可用的。
3.注册Filter组件实现过滤。
Slf4j
Component
WebFilter(/api)
public class ApiIPFilter implements Filter {Autowiredprivate IPService ipService;Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException {log.debug(IP filter execute);HttpServletRequest request (HttpServletRequest) servletRequest;HttpServletResponse response (HttpServletResponse) servletResponse;String originIp IPUtil.getOriginIp(request);String method request.getMethod();PrintWriter out null;try {//js跨域的预检请求不经过处理逻辑。开发模式下前端启动访问8521的页面进行请求测试会跨域if (method.equals(OPTIONS)) {response.setStatus(HttpServletResponse.SC_OK);return;}boolean checkIP ipService.checkIP(originIp);if (!checkIP) {out response.getWriter();response.setStatus(HttpServletResponse.SC_FORBIDDEN);out.append(JSON.toJSONString(ResponseDto.fail(Illegal ip ( originIp ), access forbidden)));} else {filterChain.doFilter(servletRequest, servletResponse);}} catch (Exception e) {response.setStatus(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);out.append(JSON.toJSONString(ResponseDto.fail(e.toString())));log.error(e.toString());} finally {if (out ! null) {out.close();}}}这里会对某些IP进行过滤。
最后启动类中的ServletComponentScan注解扫描web组件。
SpringBootApplication
//SpringBoot启动时扫描注册注解标注的Web组件
ServletComponentScan
public class SpringbootDemoApplication {public static void main(String[] args) {SpringApplication.run(SpringbootDemoApplication.class, args);}
}
