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Springboot生產(chǎn)環(huán)境下，你知道如何動(dòng)態(tài)修改日志級(jí)別嗎？

作者：Springboot實(shí)戰(zhàn)案例錦集
開發(fā) 架構(gòu)
如果你了解過Spring Boot Admin的應(yīng)該都知道它提供了動(dòng)態(tài)切換日志級(jí)別的功能，本篇文章將帶你了解不通過Spring Boot Admin動(dòng)態(tài)實(shí)現(xiàn)日志切換的功能。

項(xiàng)目運(yùn)行時(shí)需要打印更加詳細(xì)的日志信息又不想修改配置文件然后重啟服務(wù)，有沒有一種辦法可以不直接修改配置重啟服務(wù)的方式控制日志的級(jí)別呢？有，如果你了解過Spring Boot Admin的應(yīng)該都知道它提供了動(dòng)態(tài)切換日志級(jí)別的功能，本篇文章將帶你了解不通過Spring Boot Admin動(dòng)態(tài)實(shí)現(xiàn)日志切換的功能。

測(cè)試Controller

package com.pack.logger.change_level
@RestController
@RequestMapping("/logger")
public class LoggerLevelChangeController {
  
  private static final Logger logger = LoggerFactory.getLogger(LoggerLevelChangeController.class) ;
  
  @GetMapping("/print")
  public Object print() {
    logger.info("This is Info logger...") ;
    logger.debug("This is Debug logger...") ;
    return "print" ;
  }
  
}

配置文件中配置對(duì)該包進(jìn)行配置日志級(jí)別

logging:
  level:
    '[com.pack.logger.change_level]':

測(cè)試

2023-01-10 16:29:59.012  INFO 66436 --- [nio-8082-exec-5] c.p.l.c.LoggerLevelChangeController      : This is Info logger...

當(dāng)前對(duì)com.pack.logger.change_level該包配置的日志級(jí)別是INFO，所以這里輸出了info級(jí)別的日志信息。當(dāng)把級(jí)別調(diào)整為DEBUG后，控制臺(tái)中會(huì)輸出INFO和DEBUG的日志信息，這里修改完后我們是需要重新啟動(dòng)服務(wù)的。接下來看看如何不通過重啟服務(wù)也能動(dòng)態(tài)的調(diào)整日志的級(jí)別。

修改日志級(jí)別

接著我們?cè)谏厦娴腃ontroller中添加如下方法：

@GetMapping("/level")
public Object changeLevel(String level) {
  LoggingSystem system = LoggingSystem.get(LoggingSystem.class.getClassLoader());
  // 第一個(gè)參數(shù)指定你需要設(shè)置的日志記錄器的名稱
  // 第二個(gè)參數(shù)將通過接口傳入的級(jí)別轉(zhuǎn)換為L(zhǎng)ogLevel后進(jìn)行設(shè)置
  system.setLogLevel("com.pack.logger.change_level", resolveLogLevel(level)) ;
  return "change logger level success" ;
}
private LogLevel resolveLogLevel(String level) {
  String trimmedLevel = level.trim();
  return LogLevel.valueOf(trimmedLevel.toUpperCase(Locale.ENGLISH));
}

通過LogginSystem對(duì)象進(jìn)行日志級(jí)別的設(shè)置。

測(cè)試

圖片

將日志級(jí)別設(shè)置為debug

再次方法上面的print接口，控制臺(tái)輸出：

2023-01-10 16:38:40.490  INFO 66436 --- [nio-8082-exec-9] c.p.l.c.LoggerLevelChangeController      : This is Info logger...
2023-01-10 16:38:40.490 DEBUG 66436 --- [nio-8082-exec-9] c.p.l.c.LoggerLevelChangeController      : This is Debug logger...

日志級(jí)別切換成功，如果服務(wù)重啟后你這動(dòng)態(tài)設(shè)置的也將無效。

修改整個(gè)系統(tǒng)日志級(jí)別

上面的示例是僅僅對(duì)指定的日志記錄器的名稱進(jìn)行設(shè)置，如果要對(duì)整個(gè)系統(tǒng)的日志級(jí)別進(jìn)行調(diào)整可以通過如下方式：

// 修改上面的changeLevel方法
// 將要設(shè)置的日志記錄器名稱也通過參數(shù)傳遞
@GetMapping("/level")
public Object changeLevel(String name, String level) {
  LoggingSystem system = LoggingSystem.get(LoggingSystem.class.getClassLoader());
  // 如果日志記錄器名稱傳入的是root，那么將其設(shè)置為null
  if (name.equalsIgnoreCase("root")) {
    name = null;
  }
  // 只要將name置為null，那么整個(gè)系統(tǒng)的級(jí)別都將一同進(jìn)行調(diào)整
  system.setLogLevel(name, resolveLogLevel(level)) ;
  return "change logger level success" ;
}

測(cè)試：

圖片

將root日志級(jí)別修改為debug

2023-01-10 16:48:15.244 DEBUG 50544 --- [nio-8082-exec-6] o.a.coyote.http11.Http11InputBuffer      : Before fill(): parsingHeader: [true], parsingRequestLine: [true], parsingRequestLinePhase: [0], parsingRequestLineStart: [0], byteBuffer.position(): [0], byteBuffer.limit(): [0], end: [1166]
2023-01-10 16:48:15.244 DEBUG 50544 --- [nio-8082-exec-6] o.a.tomcat.util.net.SocketWrapperBase    : Socket: [org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper@619d8bee:org.apache.tomcat.util.net.NioChannel@38066775:java.nio.channels.SocketChannel[connected local=/0:0:0:0:0:0:0:1:8082 remote=/0:0:0:0:0:0:0:1:59173]], Read from buffer: [0]
2023-01-10 16:48:15.244 DEBUG 50544 --- [nio-8082-exec-6] org.apache.tomcat.util.net.NioEndpoint   : Socket: [org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper@619d8bee:org.apache.tomcat.util.net.NioChannel@38066775:java.nio.channels.SocketChannel[connected local=/0:0:0:0:0:0:0:1:8082 remote=/0:0:0:0:0:0:0:1:59173]], Read direct from socket: [1166]
2023-01-10 16:48:15.244 DEBUG 50544 --- [nio-8082-exec-6] o.a.coyote.http11.Http11InputBuffer      : Received [GET /logger2/print HTTP/1.1
Host: localhost:8082
Connection: keep-alive
Cache-Control: max-age=0
sec-ch-ua: "Not?A_Brand";v="8", "Chromium";v="108", "Google Chrome";v="108"
sec-ch-ua-mobile: ?0
sec-ch-ua-platform: "Windows"
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
Sec-Fetch-Site: none
Sec-Fetch-Mode: navigate
Sec-Fetch-User: ?1
Sec-Fetch-Dest: document
Accept-Encoding: gzip, deflate, br
Accept-Language: zh-CN,zh;q=0.9
Cookie: rememberMe=true; SESSION=YzQ4NTBkOTQtN2EzYi00YWNjLTk0ZmItZTBmYWVlNGJiNDUx; username=admin; size=small; sidebarStatus=1; password=KfhG4ggUsr1BSTaK5EMdiKhM+5GWwmRl9agleoPd4kaDAjpntUNu81ogBYVblALKNf9uqqnY+vEmCpY0ALWuyw==; Admin-Token=eyJhbGciOiJIUzUxMiJ9.eyJsb2dpbl91c2VyX2tleSI6Ijk0MGEwZmVhLWY2NWMtNGRmNy1hMDhhLWMxZDRhMDBkODZmOSJ9.r4syG-ZXBwOre2p6CDpIqaBePZuzPHFjako6oGXUejqxzxAoHA70Ov5bwmqJ9WB-rnwPQx-QSKxLJKDcgfBKdw; JSESSIONID=862D0514B6BDF558E299783289188AB9

]
2023-01-10 16:48:15.245 DEBUG 50544 --- [nio-8082-exec-6] o.a.t.util.http.Rfc6265CookieProcessor   : Cookies: Parsing b[]: rememberMe=true; SESSION=YzQ4NTBkOTQtN2EzYi00YWNjLTk0ZmItZTBmYWVlNGJiNDUx; username=admin; size=small; sidebarStatus=1; password=KfhG4ggUsr1BSTaK5EMdiKhM+5GWwmRl9agleoPd4kaDAjpntUNu81ogBYVblALKNf9uqqnY+vEmCpY0ALWuyw==; Admin-Token=eyJhbGciOiJIUzUxMiJ9.eyJsb2dpbl91c2VyX2tleSI6Ijk0MGEwZmVhLWY2NWMtNGRmNy1hMDhhLWMxZDRhMDBkODZmOSJ9.r4syG-ZXBwOre2p6CDpIqaBePZuzPHFjako6oGXUejqxzxAoHA70Ov5bwmqJ9WB-rnwPQx-QSKxLJKDcgfBKdw; JSESSIONID=862D0514B6BDF558E299783289188AB9
2023-01-10 16:48:15.245 DEBUG 50544 --- [nio-8082-exec-6] o.a.catalina.connector.CoyoteAdapter     :  Requested cookie session id is 862D0514B6BDF558E299783289188AB9
2023-01-10 16:48:15.245 DEBUG 50544 --- [nio-8082-exec-6] o.a.c.authenticator.AuthenticatorBase    : Security checking request GET /logger2/print
2023-01-10 16:48:15.245 DEBUG 50544 --- [nio-8082-exec-6] org.apache.catalina.realm.RealmBase      :   No applicable constraints defined
2023-01-10 16:48:15.245 DEBUG 50544 --- [nio-8082-exec-6] o.a.c.authenticator.AuthenticatorBase    : Not subject to any constraint
2023-01-10 16:48:15.245 DEBUG 50544 --- [nio-8082-exec-6] org.apache.tomcat.util.http.Parameters   : Set encoding to UTF-8
2023-01-10 16:48:15.245 DEBUG 50544 --- [nio-8082-exec-6] o.s.web.servlet.DispatcherServlet        : GET "/logger2/print", parameters={}
2023-01-10 16:48:15.246 DEBUG 50544 --- [nio-8082-exec-6] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped to com.pack.logger.change_level.LoggerController#print()
2023-01-10 16:48:15.246  INFO 50544 --- [nio-8082-exec-6] c.p.l.change_level.LoggerController      : This is Info logger...
2023-01-10 16:48:15.246 ERROR 50544 --- [nio-8082-exec-6] c.p.l.change_level.LoggerController      : This is Error logger...
2023-01-10 16:48:15.246 DEBUG 50544 --- [nio-8082-exec-6] m.m.a.RequestResponseBodyMethodProcessor : Using 'text/html', given [text/html, application/xhtml+xml, image/avif, image/webp, image/apng, application/xml;q=0.9, application/signed-exchange;v=b3;q=0.9, */*;q=0.8] and supported [text/plain, */*, text/plain, */*, application/json, application/*+json, application/json, application/*+json]
2023-01-10 16:48:15.247 DEBUG 50544 --- [nio-8082-exec-6] m.m.a.RequestResponseBodyMethodProcessor : Writing ["print"]
2023-01-10 16:48:15.247 DEBUG 50544 --- [nio-8082-exec-6] o.s.web.servlet.DispatcherServlet        : Completed 200 OK
2023-01-10 16:48:15.247 DEBUG 50544 --- [nio-8082-exec-6] o.a.coyote.http11.Http11InputBuffer      : Before fill(): parsingHeader: [true], parsingRequestLine: [true], parsingRequestLinePhase: [0], parsingRequestLineStart: [0], byteBuffer.position(): [0], byteBuffer.limit(): [0], end: [1166]
2023-01-10 16:48:15.247 DEBUG 50544 --- [nio-8082-exec-6] o.a.tomcat.util.net.SocketWrapperBase    : Socket: [org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper@619d8bee:org.apache.tomcat.util.net.NioChannel@38066775:java.nio.channels.SocketChannel[connected local=/0:0:0:0:0:0:0:1:8082 remote=/0:0:0:0:0:0:0:1:59173]], Read from buffer:

[0]
2023-01-10 16:48:15.247 DEBUG 50544 --- [nio-8082-exec-6] org.apache.tomcat.util.net.NioEndpoint   : Socket: [org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper@619d8bee:org.apache.tomcat.util.net.NioChannel@38066775:java.nio.channels.SocketChannel[connected local=/0:0:0:0:0:0:0:1:8082 remote=/0:0:0:0:0:0:0:1:59173]], Read direct from socket: [0]
2023-01-10 16:48:15.247 DEBUG 50544 --- [nio-8082-exec-6] o.a.coyote.http11.Http11InputBuffer      : Received []
2023-01-10 16:48:15.247 DEBUG 50544 --- [nio-8082-exec-6] o.apache.coyote.http11.Http11Processor   : Socket: [org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper@619d8bee:org.apache.tomcat.util.net.NioChannel@38066775:java.nio.channels.SocketChannel[connected local=/0:0:0:0:0:0:0:1:8082 remote=/0:0:0:0:0:0:0:1:59173]], Status in: [OPEN_READ], State out: [OPEN]
2023-01-10 16:48:15.247 DEBUG 50544 --- [nio-8082-exec-6] org.apache.tomcat.util.net.NioEndpoint   : Registered read interest for [org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper@619d8bee:org.apache.tomcat.util.net.NioChannel@38066775:java.nio.channels.SocketChannel[connected local=/0:0:0:0:0:0:0:1:8082 remote=/0:0:0:0:0:0:0:1:59173]]
2023-01-10 16:48:16.258 DEBUG 50544 --- [nio-8082-exec-7] o.apache.tomcat.util.threads.LimitLatch  : Counting down[http-nio-8082-exec-7] latch=2
2023-01-10 16:48:16.258 DEBUG 50544 --- [nio-8082-exec-7] org.apache.tomcat.util.net.NioEndpoint   : Calling [org.apache.tomcat.util.net.NioEndpoint@78b6cb49].closeSocket([org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper@76712a2f:org.apache.tomcat.util.net.NioChannel@724ea039:java.nio.channels.SocketChannel[connected local=/0:0:0:0:0:0:0:1:8082 remote=/0:0:0:0:0:0:0:1:59176]])

這次輸出了很多的信息，整個(gè)請(qǐng)求的所有信息。

關(guān)閉日志

修改上面解析日志級(jí)別的方法：

private LogLevel resolveLogLevel(String level) {
  String trimmedLevel = level.trim();
  if ("false".equalsIgnoreCase(trimmedLevel)) {
    return LogLevel.OFF;
  }
  return LogLevel.valueOf(trimmedLevel.toUpperCase(Locale.ENGLISH));
}

只需要將level設(shè)置為false即可。

責(zé)任編輯：武曉燕 來源： 實(shí)戰(zhàn)案例錦集
Springboot修改日志級(jí)別
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