全局监听请求：HandlerInterceptor

创建拦截器类

public class RequestInterceptor implements HandlerInterceptor {@Overridepublic boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {return HandlerInterceptor.super.preHandle(request, response, handler);}@Overridepublic void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);}@Overridepublic void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {...TrackUtil.report(info); // 通过工具类调用服务}
}

添加拦截器

@Configuration
public class WebConfig implements WebMvcConfigurer {@Overridepublic void addInterceptors(InterceptorRegistry interceptorRegistry) {interceptorRegistry.addInterceptor(...); // 其他拦截器interceptorRegistry.addInterceptor(new RequestInterceptor()); // 添加本拦截器}
}

拦截器类调用Service服务

借助工具类

@Component
public class TrackUtil {public static TrackUtil trackUtil; //声明对象@Autowired //注入TrackService trackService;@PostConstruct //初始化public void init() {trackUtil = this;trackUtil.trackService = this.trackService;}public static void report(Object info){trackUtil.trackService.report(info);}
}

全局异常处理：@ExceptionHandler

统一处理业务异常

@ControllerAdvice
public class GlobalExceptionHandler {@ExceptionHandler({ServletException.class})@ResponseBody@ResponseStatus(value = HttpStatus.BAD_REQUEST)public JsonResult errorHandler1(HttpServletRequest request,HttpServletResponse response,Exception e) {e.printStackTrace();response.setCharacterEncoding("UTF-8");//防止返回中文乱码return JsonResult.build(400, e.getMessage());}@ExceptionHandler({Exception.class})@ResponseBody@ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)public JsonResult errorHandler(HttpServletRequest request,HttpServletResponse response,Exception e) {e.printStackTrace();response.setCharacterEncoding("UTF-8");//防止返回中文乱码return JsonResult.build(500, e.getMessage());}
}

自定义JsonResult

@Data
public class JsonResult {private Integer code; //响应状态码private String msg; //响应消息private Object data; //响应数据public JsonResult(Integer code, String msg, Object data) {this.code = code;this.msg = msg;this.data = data;}public JsonResult(Integer code, String msg) {this.code = code;this.msg = msg;}public static JsonResult build(Integer status, String msg, Object data) {JsonResult jsonResult = new JsonResult(status, msg, data);return jsonResult;}public static JsonResult build(Integer status, String msg) {JsonResult jsonResult = new JsonResult(status, msg);return jsonResult;}public static JsonResult ok( Object data) {JsonResult jsonResult = new JsonResult(200, "success", data);return jsonResult;}@Overridepublic String toString() {JSONObject jsonObject=new JSONObject();jsonObject.put("code",code);jsonObject.put("msg",msg);jsonObject.put("data",data);return JSON.toJSONString(jsonObject);}
}

全局跨域配置：WebMvcConfigurer

@Configuration
public class WebConfig implements WebMvcConfigurer {@Overridepublic void addCorsMappings(CorsRegistry corsRegistry) {corsRegistry.addMapping("/**").allowedOrigins("*").allowedMethods("GET", "HEAD", "POST", "PUT", "DELETE", "OPTIONS").allowCredentials(true).maxAge(3600).allowedHeaders("*");}
}

静态(static)方法中调用接口（Service层）

@Component
public class JwtUtil {/*** 静态方法调用非静态接口层(Service层)*/public static JwtUtil jwtUtil; //声明对象@PostConstruct //初始化public void init() {jwtUtil = this;jwtUtil.userService = this.userService;}@Autowired //注入UserService userService;public static boolean checkSign(String token) {
...String username= jwtUtil.userService.getUsernameById(userId);
...
}

定时任务

package com.example.demo.util;import lombok.extern.slf4j.Slf4j;
import org.springframework.scheduling.annotation.Async;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;@Component
@EnableScheduling //开启定时任务
@EnableAsync //开启多线程
@Slf4j
public class ScheduleAsync {/** cron* [秒] [分] [小时] [日] [月] [周] [年]* 年非必须* *每秒/分/小时/日...都会触发* ？不指定值，只可用于日和周* 1-3表示区间，1、2、3都会触发* 5/15表示递增触发，从5开始，每15秒触发* L表示最后一天或周六*/@Async@Scheduled(cron = "0/10 * * * * ?")//从00开始每十秒public void first(){log.info(LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));}@Async@Scheduled(cron = "0 0 2 * * ?")//每天半夜两点public void second(){log.info(LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")));}
}