package com.didispace.chapter13; import lombok.extern.log4j.Log4j; import lombok.extern.slf4j.Slf4j; import org.springframework.beans.factory.annotation.Value; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @SpringBootApplication public class Chapter13Application { public static void main(String[] args) { SpringApplication.run(Chapter13Application.class, args); } @Slf4j @RestController static class HelloController { @Value("${db:}") private String db; @Value("${mq:}") private String mq; @RequestMapping("/") @Log4j public String index() { log.info("db：" + db); log.info("mq：" + mq); return ""; } } }

package com.why.common.exception; import com.why.entity.R; import lombok.extern.slf4j.Slf4j; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.RestControllerAdvice; /** * 全局异常处理 */ @Slf4j @RestControllerAdvice public class GlobalExceptionHandler { @ExceptionHandler(value = RuntimeException.class) public R handler(RuntimeException e){ log.error("运行时异常：---------{}" + e.getMessage()); return R.error(e.getMessage()); } }

根据你提供的代码，我注意到你使用了 lombok 注解 @Slf4j 来自动生成日志记录器。这个注解会为你的类生成一个名为 log 的静态日志记录器。因此，你不需要手动声明一个名为 log 的变量。从你的代码中看不出...

import lombok.extern.slf4j.Slf4j;@Slf4j，如何不使用lombok还可以使用log

import org.slf4j.LoggerFactory; public class MyClass { private static final Logger log = LoggerFactory.getLogger(MyClass.class); // ... } 3. 使用日志记录器记录日志： log.debug("Debug ...

import lombok.extern.slf4j.Slf4j;

这段代码使用了Lombok库的@Slf4j注解，它会在编译时自动生成一个名为log的slf4j日志对象，从而简化了在代码中编写日志的过程。在使用这个日志对象时，可以直接调用它的方法来输出日志信息，而不必在每个类中都声明一...

import lombok.extern.slf4j.Slf4j;Slf4j为啥高亮

@Slf4j 是 Lombok 提供的注解之一，它会在编译时自动生成一个名为 log 的私有静态变量，并使用 Slf4j 进行初始化。使用 log 变量可以方便地进行日志输出。因此，如果你的开发环境中已经安装了 Lombok 插件并...

package com.jy.common.netty.strategy; import com.jy.common.netty.protobuf.Message; import io.netty.channel.ChannelHandlerContext; import lombok.extern.slf4j.Slf4j; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Bean; import org.springframework.stereotype.Component; import javax.annotation.PostConstruct; import java.util.List; import java.util.Map; import java.util.stream.Collectors; @Component public class StrategyFactory { @Autowired private List<ChannelReadStrategy> channelReadStrategies; public void channelRead(ChannelHandlerContext ctx, Object t){ Message message= (Message) t; for(ChannelReadStrategy strategy : channelReadStrategies){ if(strategy.getCommandType()==message.getCmd()){ strategy.channelRead(ctx,t); } } } } 优化洗这段代码

import lombok.extern.slf4j.Slf4j; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Configuration; import javax.annotation.PostConstruct; ...

package com.itheima.reggie.config; import lombok.extern.slf4j.Slf4j; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport; @Slf4j @Configuration public class WebMvcConfig extends WebMvcConfigurationSupport { /** * 设置静态资源映射 * @param registry */ @Override protected void addResourceHandlers(ResourceHandlerRegistry registry) { log.info("开始进行静态资源映射..."); registry.addResourceHandler("/backend/").addResourceLocations("classpath:/backend/"); registry.addResourceHandler("/front/").addResourceLocations("classpath:/front/"); } }

这是一段用于在Spring项目中配置静态资源映射的代码。它继承了WebMvcConfigurationSupport类并重写了addResourceHandlers()方法，在方法中使用ResourceHandlerRegistry类的addResourceHandler()和...

package com.example.demo.controller; import com.example.demo.entity.*; import lombok.extern.slf4j.Slf4j; import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; @Slf4j @RequestMapping(value = "user") @RestController public class usercontroller { private userinfo userinfo; @GetMapping(value = "login") public String login(){ return "你好"; } @GetMapping("register") public String register(String username,String password){ log.info("name:{}", username); log.info("password:{}", password); int resultOCunt = userinfomapper.saveinfo("username", "password"); return "注册成功"; } }

我看到你的代码中使用了 Lombok 提供的 @Slf4j 注解来自动生成日志对象，这是一种很方便的方式。在登录接口中，你只是简单地返回了一个字符串 "你好"，这显然不是一个真正的登录功能。如果你想要实现登录功能，你...

package com.jy.common.netty.strategy.channelstrategy; import com.jy.common.netty.protobuf.Message; import com.jy.common.netty.service.ClientService; import com.jy.common.netty.strategy.ChannelReadStrategy; import com.jy.common.utils.spring.SpringUtils; import io.netty.channel.ChannelHandlerContext; import lombok.extern.slf4j.Slf4j; import org.springframework.stereotype.Component; /** * 储存MAC地址 */ @Component @Slf4j public class NormalStrategy implements ChannelReadStrategy { private Message.CommandType commandType = Message.CommandType.MAC_ADDRESS; private ClientService clientService; public ClientService getClientService() { if (clientService == null) { clientService = SpringUtils.getBean(ClientService.class); } return clientService; } @Override public void channelRead(ChannelHandlerContext ctx, Object t) { Message message= (Message) t; getClientService().add(message.getMac(),ctx); log.info("mac地址保存成功！"); } @Override public Message.CommandType getCommandType() { return commandType; } } 优化这段代码

import lombok.extern.slf4j.Slf4j; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; @Component @Slf4j public class NormalStrategy ...

帮我看看定时任务为什么不生效，代码如下：package com.chinamobile.cmss.cdispatching.cutplan.scheduler; import com.chinamobile.cmss.cdispatching.cut.mapper.cut.NcReservationMapper; import com.chinamobile.cmss.cdispatching.cutplan.config.condition.SHEnvironContion; import com.chinamobile.cmss.cdispatching.cutplan.service.tenant.impl.SupplementaryDataService; import lombok.extern.slf4j.Slf4j; import org.apache.commons.collections.CollectionUtils; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.context.annotation.Conditional; import org.springframework.scheduling.annotation.EnableScheduling; import org.springframework.scheduling.annotation.Scheduled; import org.springframework.stereotype.Component; import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.List; /** * @Author zhoupeng * @Date 2023/4/24 0024 16:14 * @Desc 割接管理平台的割接信息数据同步租户系统 */ @Component @EnableScheduling @Slf4j //@Conditional(SHEnvironContion.class) public class CutDataSyncScheduler { @Autowired private SupplementaryDataService dataService; @Autowired private NcReservationMapper ncReservationMapper; /** * 每天23:30同步 / @Scheduled(cron = "0 30 19 * ?") public void syncData() { log.info("syncData start"); } }

根据你提供的代码来看，定时任务的cron表达式是 "0 30 19 * * ?"，表示每天晚上19:30执行任务。请检查一下你的服务器时间是否正确，如果时间不正确，可能导致定时任务无法按照预期执行。另外，你可以在程序启动时...

lombok.extern.slf4j.Slf4j 使用示例

lombok.extern.slf4j.Slf4j 是 Lombok 框架提供的注解，用于在 Java 项目中启用 SLF4J（Simple Logging Facade for Java）日志框架。Lombok 是一个简化 Java 编程的库，通过注解可以自动生成一些常见的 ...

lombok.extern.slf4j.Slf4j 怎么用

import lombok.extern.slf4j.Slf4j; // 引入 Lombok 的 slf4j 注解 @Slf4j public class MyClass { public void myMethod() { // 记录日志 logger.info("Info message"); logger.warn("Warning message"); ...

package com.tiger.biz.websocket; import lombok.extern.slf4j.Slf4j; import org.java_websocket.client.WebSocketClient; import org.java_websocket.drafts.Draft_6455; import org.java_websocket.handshake.ServerHandshake; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Value; import org.springframework.data.redis.core.RedisTemplate; import org.springframework.stereotype.Component; import javax.websocket.server.ServerEndpoint; import java.net.URI; import java.text.SimpleDateFormat; import java.util.Date; import java.util.Map; import java.util.concurrent.Executors; import java.util.concurrent.ScheduledExecutorService; import java.util.concurrent.TimeUnit; /** * websocket的客户端 */ @Slf4j public class DemoWebSocketClient extends WebSocketClient { @Autowired private RedisTemplate<String, String> redisTemplate; public static final String HEARTBEAT_CMD = "此处为商定的保活命令"; public DemoWebSocketClient(URI serverUri) { super(serverUri, new Draft_6455()); } @Override public void onOpen(ServerHandshake serverHandshake) { //开启心跳保活 heartbeat(this); log.info("===建立连接,心跳保活开启==="); } @Override public void onMessage(String s) { log.info("{}时来自服务端的消息：{}", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new Date()), s); try { Map<Object, Object> map = redisTemplate.opsForHash().entries("zd:location"); System.out.println(map.size()+"dd"); } catch (Exception e) { e.printStackTrace(); } } @Override public void onClose(int a, String s, boolean b) { //重连 log.info("由于:{},连接被关闭,开始尝试重新连接", s); DemoReconnectThreadEnum.getInstance().reconnectWs(this); } @Override public void onError(Exception e) { log.error("====websocket出现错误====" + e.getMessage()); } /** * 心跳保活 * * @param var1 */ private void heartbeat(DemoWebSocketClient var1) { Schedul 改进以上代码怎么让 redistimplate正常注入且URI serverUri不报错

@Slf4j public class DemoWebSocketClient extends WebSocketClient { private RedisTemplate, String> redisTemplate; @Value("${websocket.server-uri}") private String serverUri; public ...

package com.bolt.gateway.config; import com.bolt.gateway.handler.HystrixFallbackHandler; import com.bolt.gateway.props.AuthProperties; import com.bolt.gateway.props.RouteProperties; import lombok.AllArgsConstructor; import lombok.extern.slf4j.Slf4j; import org.springframework.boot.context.properties.EnableConfigurationProperties; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpMethod; import org.springframework.http.HttpStatus; import org.springframework.http.MediaType; import org.springframework.http.server.reactive.ServerHttpRequest; import org.springframework.http.server.reactive.ServerHttpResponse; import org.springframework.web.cors.reactive.CorsUtils; import org.springframework.web.filter.reactive.HiddenHttpMethodFilter; import org.springframework.web.reactive.function.server.RequestPredicates; import org.springframework.web.reactive.function.server.RouterFunction; import org.springframework.web.reactive.function.server.RouterFunctions; import org.springframework.web.server.ServerWebExchange; import org.springframework.web.server.WebFilter; import org.springframework.web.server.WebFilterChain; import reactor.core.publisher.Mono; /** * 路由配置信息 * * @author arch_group */ @Slf4j @Configuration @AllArgsConstructor @EnableConfigurationProperties({RouteProperties.class, AuthProperties.class}) public class RouterFunctionConfiguration { /** * 这里为支持的请求头，如果有自定义的header字段请自己添加 / private static final String ALLOWED_HEADERS = "x-requested-with, zkpt-ks-auth, Content-Type, Authorization, credential, X-XSRF-TOKEN, token, username, client"; private static final String ALLOWED_METHODS = ""; private static final String ALLOWED_ORIGIN = ""; private static final String ALLOWED_EXPOSE = ""; private static final String MAX_AGE = "18000L"; private final HystrixFallbackHandler hystrixFallbackHandler; @Bean public WebFilter corsFilter() { return (ServerWebExchange ctx, WebFilterChain chain) -> { ServerHttpRequest request = ctx.getRequest(); if (CorsUtils.isCorsRequest(request)) { ServerHttpResponse response = ctx.getResponse(); HttpHeaders headers = response.getHeaders(); headers.add("Access-Control-Allow-Headers", ALLOWED_HEADERS); headers.add("Access-Control-Allow-Methods", ALLOWED_METHODS); headers.add("Access-Control-Allow-Origin", ALLOWED_ORIGIN); headers.add("Access-Control-Expose-Headers", ALLOWED_EXPOSE); headers.add("Access-Control-Max-Age", MAX_AGE); headers.add("Access-Control-Allow-Credentials", "true"); if (request.getMethod() == HttpMethod.OPTIONS) { response.setStatusCode(HttpStatus.OK); return Mono.empty(); } } return chain.filter(ctx); }; } @Bean public RouterFunction routerFunction() { return RouterFunctions.route( RequestPredicates.path("/fallback") .and(RequestPredicates.accept(MediaType.TEXT_PLAIN)), hystrixFallbackHandler); } /** * 解决springboot2.0.5版本出现的 Only one connection receive subscriber allowed. * 参考：https://github.com/spring-cloud/spring-cloud-gateway/issues/541 */ @Bean public HiddenHttpMethodFilter hiddenHttpMethodFilter() { return new HiddenHttpMethodFilter() { @Override public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) { return chain.filter(exchange); } }; } }

这是一个Spring Cloud Gateway的路由配置类。它使用了函数式编程风格来定义路由规则。在这个类中，主要做了以下几件事情： 1. 配置跨域请求的过滤器(corsFilter)：当请求的Origin与服务端的地址不一致时，浏览器会...

package org.example.application.custom.controller; import lombok.extern.slf4j.Slf4j; import org.example.application.common.ResponseDTO; import org.example.application.common.utils.jwt.JwtIgnore; import org.example.application.custom.entity.Free; import org.example.application.custom.form.FreeForm; import org.example.application.custom.service.FreeService; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestBody; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RestController; import java.util.List; @RestController @RequestMapping(value = "/api/free") @Slf4j public class FreeController { private final FreeService freeService; public FreeController(FreeService freeService) { this.freeService = freeService; } @RequestMapping("/list/mine") public ResponseDTO queryMine(@RequestBody FreeForm form) { Iterable<Free> list = freeService.queryMineList(form); return ResponseDTO.returnSuccess(list); } @RequestMapping("/list/check") public ResponseDTO queryCheck(@RequestBody FreeForm form) { Iterable<Free> list = freeService.queryCheckList(form); return ResponseDTO.returnSuccess(list); } @RequestMapping("/save") public ResponseDTO save(@RequestBody FreeForm form) { freeService.save(form); return ResponseDTO.returnSuccess(); } @RequestMapping("/get/{id}") public ResponseDTO getById(@PathVariable String id) { Free entity = freeService.getById(id); return ResponseDTO.returnSuccess(entity); } @RequestMapping("/delete/{id}") public ResponseDTO deleteById(@PathVariable String id) { freeService.deleteById(id); return ResponseDTO.returnSuccess(); } @RequestMapping("/check/{id}/{status}") public ResponseDTO check(@PathVariable String id, @PathVariable Integer status) { freeService.check(id, status); return ResponseDTO.returnSuccess(); } }

这段代码是一个 Spring Boot 的 Controller 类，位于 org.example.application.custom.controller 包下。它引入了 lombok、ResponseDTO、JwtIgnore、...该类使用了 @Slf4j 注解，表示使用了 lombok 提供的日志功能。

lombok.extern.slf4j的依赖

lombok.extern.slf4j的依赖是指在使用Java开发时，使用了Lombok工具包中@Slf4j注解时所需的依赖项。该依赖项使得在生成代码中自动添加SLF4J日志注释，并做到简洁明了地输出日志信息。

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import lombok.extern.slf4j.Slf4j;@Slf4j，如何不使用lombok还可以使用log

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import lombok.extern.slf4j.Slf4j;Slf4j为啥高亮

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