为什么 Log4j2 没有登录 Spring 启动应用程序？
Why is Log4j2 not logging inside Spring Boot Application?
我正在尝试使用 spring 启动启动器和 spring 启动启动器 Web。到目前为止，我已经得到了我认为非常简单的设置。我可以看到应用程序显然正在查找和使用 log4j2-spring.xml 文件，所以我的问题是为什么 MyRunner class 中的任何内容都不通过 log4j2 记录？它确实执行并且 System.out.println() 语句正在写入控制台，但 LOG.error 消息不是。请帮忙。
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath />
</parent>
<groupId>com.demo</groupId>
<artifactId>demo</artifactId>
<version>0.0.1</version>
<name>iim</name>
<description>Demo</description>
<properties>
<java.version>1.8</java.version>
<maven-jar-plugin.version>3.1.1</maven-jar-plugin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-core</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
log4j2-spring.xml:
<Properties>
<Property name="LOG_PATTERN">
%d{yyyy-MM-dd HH:mm:ss,SSS} [%t] %-5p [%F:%L] %m%n
</Property>
</Properties>
<Appenders>
<Console name="ConsoleAppender" target="SYSTEM_OUT" follow="true">
<PatternLayout pattern="${LOG_PATTERN}"/>
</Console>
</Appenders>
<Loggers>
<logger name="org.springframework" level="WARN" />
<logger name="org.apache.ibatis.logging.jdbc.BaseJdbcLogger" level="ERROR" />
<logger name="java.sql" level="ERROR" />
<logger name="org.mybatis" level="ERROR" />
<Root level="INFO">
<AppenderRef ref="ConsoleAppender" />
</Root>
</Loggers>
Application.java:
import java.util.stream.Stream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Component;
@SpringBootApplication
@ComponentScan("com.demo")
public class Application {
private static final Logger LOG = LoggerFactory.getLogger(Application.class);
public static void main(String[] args) {
LOG.warn("********** Starting the application");
SpringApplication.run(Application.class, args);
}
@Component
public class MyRunner implements CommandLineRunner {
@Override
public void run(String... args) throws Exception {
System.out.println(String.format("%s!!!", "HELLO WORLD"));
LOG.error(String.format("%s!!!", "HELLO WORLD"));
Stream.of("John Travolta", "Julia Childs", "Jennifer Anniston", "Helen Hunt", "Rachel Green").forEach(n -> {
System.out.println(n);
LOG.error(n);
});
}
}
}
控制台输出：
2019-12-11 10:08:12,294 [restartedMain] INFO [DirectJDKLog.java:173] Initializing ProtocolHandler ["http-nio-8080"]
2019-12-11 10:08:12,296 [restartedMain] INFO [DirectJDKLog.java:173] Starting service [Tomcat]
2019-12-11 10:08:12,297 [restartedMain] INFO [DirectJDKLog.java:173] Starting Servlet engine: [Apache Tomcat/9.0.27]
2019-12-11 10:08:12,377 [restartedMain] INFO [DirectJDKLog.java:173] Initializing Spring embedded WebApplicationContext
2019-12-11 10:08:12,818 [restartedMain] INFO [HikariDataSource.java:110] HikariPool-1 - Starting...
2019-12-11 10:08:12,968 [restartedMain] INFO [HikariDataSource.java:123] HikariPool-1 - Start completed.
2019-12-11 10:08:13,407 [restartedMain] INFO [Slf4jLogger.java:42] SELECT COUNT(*) FROM db_example.DATABASECHANGELOGLOCK
2019-12-11 10:08:13,413 [restartedMain] INFO [Slf4jLogger.java:42] SELECT COUNT(*) FROM db_example.DATABASECHANGELOGLOCK
2019-12-11 10:08:13,415 [restartedMain] INFO [Slf4jLogger.java:42] SELECT `LOCKED` FROM db_example.DATABASECHANGELOGLOCK WHERE ID=1
2019-12-11 10:08:13,428 [restartedMain] INFO [Slf4jLogger.java:42] Successfully acquired change log lock
2019-12-11 10:08:13,967 [restartedMain] INFO [Slf4jLogger.java:42] Reading resource: com/demo/db/liquibase/tables/user.sql
2019-12-11 10:08:14,014 [restartedMain] INFO [Slf4jLogger.java:42] SELECT MD5SUM FROM db_example.DATABASECHANGELOG WHERE MD5SUM IS NOT NULL LIMIT 1
2019-12-11 10:08:14,015 [restartedMain] INFO [Slf4jLogger.java:42] SELECT COUNT(*) FROM db_example.DATABASECHANGELOG
2019-12-11 10:08:14,016 [restartedMain] INFO [Slf4jLogger.java:42] Reading from db_example.DATABASECHANGELOG
2019-12-11 10:08:14,016 [restartedMain] INFO [Slf4jLogger.java:42] SELECT * FROM db_example.DATABASECHANGELOG ORDER BY DATEEXECUTED ASC, ORDEREXECUTED ASC
2019-12-11 10:08:14,025 [restartedMain] INFO [Slf4jLogger.java:42] Successfully released change log lock
2019-12-11 10:08:14,087 [restartedMain] INFO [DirectJDKLog.java:173] Starting ProtocolHandler ["http-nio-8080"]
HELLO WORLD!!!
John Travolta
Julia Childs
Jennifer Anniston
Helen Hunt
Rachel Green
我尝试了你的代码，只做了很少的改动就可以在我的 IDE 上工作，它工作得很好，下面是更新后的代码，这段代码可以帮助你解决问题：
package com.example.demo;
import java.util.stream.Stream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.stereotype.Component;
@SpringBootApplication
public class Application {
private static final Logger LOG = LoggerFactory.getLogger(Application.class);
public static void main(String[] args) {
LOG.warn("********** Starting the application");
SpringApplication.run(Application.class, args);
}
@Component
public class MyRunner implements CommandLineRunner {
@Override
public void run(String... args) throws Exception {
System.out.println(String.format("%s!!!", "HELLO WORLD"));
LOG.error(String.format("%s!!!", "HELLO WORLD"));
Stream.of("John Travolta", "Julia Childs", "Jennifer Anniston", "Helen Hunt", "Rachel Green").forEach(n -> {
System.out.println(n);
LOG.error(n);
});
}
}
}
我一直在日志 xml(log4j2-spring.xml) 下 - src/main/resource
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="INFO">
<Properties>
<Property name="LOG_PATTERN">
%d{yyyy-MM-dd HH:mm:ss,SSS} [%t] %-5p [%F:%L] %m%n
</Property>
</Properties>
<Appenders>
<Console name="ConsoleAppender" target="SYSTEM_OUT" follow="true">
<PatternLayout pattern="shree - ${LOG_PATTERN}"/>
</Console>
</Appenders>
<Loggers>
<logger name="org.springframework" level="WARN" />
<logger name="org.apache.ibatis.logging.jdbc.BaseJdbcLogger" level="ERROR" />
<logger name="java.sql" level="ERROR" />
<logger name="org.mybatis" level="ERROR" />
<Root level="INFO">
<AppenderRef ref="ConsoleAppender" />
</Root>
</Loggers>
</Configuration>
删除了 mybatis 和 jdbc 依赖项，因为 spring 要求数据库配置。这些 Jar 可能会导致您的代码出现问题（覆盖您的日志配置）：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<maven-jar-plugin.version>3.1.1</maven-jar-plugin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
</dependency>
<!-- <dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
</dependency> -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- <dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.1</version>
</dependency> -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</dependency>
<!-- <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
</dependency>
-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- <dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-core</artifactId>
</dependency> -->
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
输出：
. ____ _ __ _ _
/\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.1.RELEASE)
shree - 2019-12-11 22:58:03,221 [restartedMain] INFO [StartupInfoLogger.java:55] Starting Application on LAPTOP-FS2FJ2C3 with PID 6044 (C:\Users\shrir\eclipse-workspace-jee-code\demo\target\classes started by shrir in C:\Users\shrir\eclipse-workspace-jee-code\demo)
shree - 2019-12-11 22:58:03,228 [restartedMain] INFO [SpringApplication.java:651] No active profile set, falling back to default profiles: default
shree - 2019-12-11 22:58:04,014 [restartedMain] INFO [DirectJDKLog.java:173] Initializing ProtocolHandler ["http-nio-8080"]
shree - 2019-12-11 22:58:04,014 [restartedMain] INFO [DirectJDKLog.java:173] Starting service [Tomcat]
shree - 2019-12-11 22:58:04,015 [restartedMain] INFO [DirectJDKLog.java:173] Starting Servlet engine: [Apache Tomcat/9.0.27]
shree - 2019-12-11 22:58:04,074 [restartedMain] INFO [DirectJDKLog.java:173] Initializing Spring embedded WebApplicationContext
shree - 2019-12-11 22:58:04,402 [restartedMain] INFO [DirectJDKLog.java:173] Starting ProtocolHandler ["http-nio-8080"]
shree - 2019-12-11 22:58:04,423 [restartedMain] INFO [StartupInfoLogger.java:61] Started Application in 1.478 seconds (JVM running for 2.412)
HELLO WORLD!!!
shree - 2019-12-11 22:58:04,424 [restartedMain] ERROR [Application.java:36] HELLO WORLD!!!
John Travolta
shree - 2019-12-11 22:58:04,424 [restartedMain] ERROR [Application.java:40] John Travolta
Julia Childs
shree - 2019-12-11 22:58:04,424 [restartedMain] ERROR [Application.java:40] Julia Childs
Jennifer Anniston
shree - 2019-12-11 22:58:04,425 [restartedMain] ERROR [Application.java:40] Jennifer Anniston
Helen Hunt
shree - 2019-12-11 22:58:04,425 [restartedMain] ERROR [Application.java:40] Helen Hunt
Rachel Green
shree - 2019-12-11 22:58:04,425 [restartedMain] ERROR [Application.java:40] Rachel Green
这可能不是您的解决方案，但会帮助您找到问题所在。
由于无法在评论部分解释，请在答案部分添加代码
你的代码是正确的，除了你必须在 运行 语句之后写日志语句的主要方法，否则一切都是正确的，它应该记录。
仅供参考，引导默认日志级别设置为 INFO。
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
LOG.warn("********** Starting the application");
}
我正在尝试使用 spring 启动启动器和 spring 启动启动器 Web。到目前为止，我已经得到了我认为非常简单的设置。我可以看到应用程序显然正在查找和使用 log4j2-spring.xml 文件，所以我的问题是为什么 MyRunner class 中的任何内容都不通过 log4j2 记录？它确实执行并且 System.out.println() 语句正在写入控制台，但 LOG.error 消息不是。请帮忙。
pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath />
</parent>
<groupId>com.demo</groupId>
<artifactId>demo</artifactId>
<version>0.0.1</version>
<name>iim</name>
<description>Demo</description>
<properties>
<java.version>1.8</java.version>
<maven-jar-plugin.version>3.1.1</maven-jar-plugin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.1</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-core</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
log4j2-spring.xml:
<Properties>
<Property name="LOG_PATTERN">
%d{yyyy-MM-dd HH:mm:ss,SSS} [%t] %-5p [%F:%L] %m%n
</Property>
</Properties>
<Appenders>
<Console name="ConsoleAppender" target="SYSTEM_OUT" follow="true">
<PatternLayout pattern="${LOG_PATTERN}"/>
</Console>
</Appenders>
<Loggers>
<logger name="org.springframework" level="WARN" />
<logger name="org.apache.ibatis.logging.jdbc.BaseJdbcLogger" level="ERROR" />
<logger name="java.sql" level="ERROR" />
<logger name="org.mybatis" level="ERROR" />
<Root level="INFO">
<AppenderRef ref="ConsoleAppender" />
</Root>
</Loggers>
Application.java:
import java.util.stream.Stream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.stereotype.Component;
@SpringBootApplication
@ComponentScan("com.demo")
public class Application {
private static final Logger LOG = LoggerFactory.getLogger(Application.class);
public static void main(String[] args) {
LOG.warn("********** Starting the application");
SpringApplication.run(Application.class, args);
}
@Component
public class MyRunner implements CommandLineRunner {
@Override
public void run(String... args) throws Exception {
System.out.println(String.format("%s!!!", "HELLO WORLD"));
LOG.error(String.format("%s!!!", "HELLO WORLD"));
Stream.of("John Travolta", "Julia Childs", "Jennifer Anniston", "Helen Hunt", "Rachel Green").forEach(n -> {
System.out.println(n);
LOG.error(n);
});
}
}
}
控制台输出：
2019-12-11 10:08:12,294 [restartedMain] INFO [DirectJDKLog.java:173] Initializing ProtocolHandler ["http-nio-8080"]
2019-12-11 10:08:12,296 [restartedMain] INFO [DirectJDKLog.java:173] Starting service [Tomcat]
2019-12-11 10:08:12,297 [restartedMain] INFO [DirectJDKLog.java:173] Starting Servlet engine: [Apache Tomcat/9.0.27]
2019-12-11 10:08:12,377 [restartedMain] INFO [DirectJDKLog.java:173] Initializing Spring embedded WebApplicationContext
2019-12-11 10:08:12,818 [restartedMain] INFO [HikariDataSource.java:110] HikariPool-1 - Starting...
2019-12-11 10:08:12,968 [restartedMain] INFO [HikariDataSource.java:123] HikariPool-1 - Start completed.
2019-12-11 10:08:13,407 [restartedMain] INFO [Slf4jLogger.java:42] SELECT COUNT(*) FROM db_example.DATABASECHANGELOGLOCK
2019-12-11 10:08:13,413 [restartedMain] INFO [Slf4jLogger.java:42] SELECT COUNT(*) FROM db_example.DATABASECHANGELOGLOCK
2019-12-11 10:08:13,415 [restartedMain] INFO [Slf4jLogger.java:42] SELECT `LOCKED` FROM db_example.DATABASECHANGELOGLOCK WHERE ID=1
2019-12-11 10:08:13,428 [restartedMain] INFO [Slf4jLogger.java:42] Successfully acquired change log lock
2019-12-11 10:08:13,967 [restartedMain] INFO [Slf4jLogger.java:42] Reading resource: com/demo/db/liquibase/tables/user.sql
2019-12-11 10:08:14,014 [restartedMain] INFO [Slf4jLogger.java:42] SELECT MD5SUM FROM db_example.DATABASECHANGELOG WHERE MD5SUM IS NOT NULL LIMIT 1
2019-12-11 10:08:14,015 [restartedMain] INFO [Slf4jLogger.java:42] SELECT COUNT(*) FROM db_example.DATABASECHANGELOG
2019-12-11 10:08:14,016 [restartedMain] INFO [Slf4jLogger.java:42] Reading from db_example.DATABASECHANGELOG
2019-12-11 10:08:14,016 [restartedMain] INFO [Slf4jLogger.java:42] SELECT * FROM db_example.DATABASECHANGELOG ORDER BY DATEEXECUTED ASC, ORDEREXECUTED ASC
2019-12-11 10:08:14,025 [restartedMain] INFO [Slf4jLogger.java:42] Successfully released change log lock
2019-12-11 10:08:14,087 [restartedMain] INFO [DirectJDKLog.java:173] Starting ProtocolHandler ["http-nio-8080"]
HELLO WORLD!!!
John Travolta
Julia Childs
Jennifer Anniston
Helen Hunt
Rachel Green
我尝试了你的代码，只做了很少的改动就可以在我的 IDE 上工作，它工作得很好，下面是更新后的代码，这段代码可以帮助你解决问题：
package com.example.demo;
import java.util.stream.Stream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.stereotype.Component;
@SpringBootApplication
public class Application {
private static final Logger LOG = LoggerFactory.getLogger(Application.class);
public static void main(String[] args) {
LOG.warn("********** Starting the application");
SpringApplication.run(Application.class, args);
}
@Component
public class MyRunner implements CommandLineRunner {
@Override
public void run(String... args) throws Exception {
System.out.println(String.format("%s!!!", "HELLO WORLD"));
LOG.error(String.format("%s!!!", "HELLO WORLD"));
Stream.of("John Travolta", "Julia Childs", "Jennifer Anniston", "Helen Hunt", "Rachel Green").forEach(n -> {
System.out.println(n);
LOG.error(n);
});
}
}
}
我一直在日志 xml(log4j2-spring.xml) 下 - src/main/resource
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="INFO">
<Properties>
<Property name="LOG_PATTERN">
%d{yyyy-MM-dd HH:mm:ss,SSS} [%t] %-5p [%F:%L] %m%n
</Property>
</Properties>
<Appenders>
<Console name="ConsoleAppender" target="SYSTEM_OUT" follow="true">
<PatternLayout pattern="shree - ${LOG_PATTERN}"/>
</Console>
</Appenders>
<Loggers>
<logger name="org.springframework" level="WARN" />
<logger name="org.apache.ibatis.logging.jdbc.BaseJdbcLogger" level="ERROR" />
<logger name="java.sql" level="ERROR" />
<logger name="org.mybatis" level="ERROR" />
<Root level="INFO">
<AppenderRef ref="ConsoleAppender" />
</Root>
</Loggers>
</Configuration>
删除了 mybatis 和 jdbc 依赖项，因为 spring 要求数据库配置。这些 Jar 可能会导致您的代码出现问题（覆盖您的日志配置）：
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>demo</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<maven-jar-plugin.version>3.1.1</maven-jar-plugin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
</dependency>
<!-- <dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
</dependency> -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</dependency>
<!-- <dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.1.1</version>
</dependency> -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
</dependency>
<!-- <dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
</dependency>
-->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<!-- <dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-core</artifactId>
</dependency> -->
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
输出：
. ____ _ __ _ _
/\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.2.1.RELEASE)
shree - 2019-12-11 22:58:03,221 [restartedMain] INFO [StartupInfoLogger.java:55] Starting Application on LAPTOP-FS2FJ2C3 with PID 6044 (C:\Users\shrir\eclipse-workspace-jee-code\demo\target\classes started by shrir in C:\Users\shrir\eclipse-workspace-jee-code\demo)
shree - 2019-12-11 22:58:03,228 [restartedMain] INFO [SpringApplication.java:651] No active profile set, falling back to default profiles: default
shree - 2019-12-11 22:58:04,014 [restartedMain] INFO [DirectJDKLog.java:173] Initializing ProtocolHandler ["http-nio-8080"]
shree - 2019-12-11 22:58:04,014 [restartedMain] INFO [DirectJDKLog.java:173] Starting service [Tomcat]
shree - 2019-12-11 22:58:04,015 [restartedMain] INFO [DirectJDKLog.java:173] Starting Servlet engine: [Apache Tomcat/9.0.27]
shree - 2019-12-11 22:58:04,074 [restartedMain] INFO [DirectJDKLog.java:173] Initializing Spring embedded WebApplicationContext
shree - 2019-12-11 22:58:04,402 [restartedMain] INFO [DirectJDKLog.java:173] Starting ProtocolHandler ["http-nio-8080"]
shree - 2019-12-11 22:58:04,423 [restartedMain] INFO [StartupInfoLogger.java:61] Started Application in 1.478 seconds (JVM running for 2.412)
HELLO WORLD!!!
shree - 2019-12-11 22:58:04,424 [restartedMain] ERROR [Application.java:36] HELLO WORLD!!!
John Travolta
shree - 2019-12-11 22:58:04,424 [restartedMain] ERROR [Application.java:40] John Travolta
Julia Childs
shree - 2019-12-11 22:58:04,424 [restartedMain] ERROR [Application.java:40] Julia Childs
Jennifer Anniston
shree - 2019-12-11 22:58:04,425 [restartedMain] ERROR [Application.java:40] Jennifer Anniston
Helen Hunt
shree - 2019-12-11 22:58:04,425 [restartedMain] ERROR [Application.java:40] Helen Hunt
Rachel Green
shree - 2019-12-11 22:58:04,425 [restartedMain] ERROR [Application.java:40] Rachel Green
这可能不是您的解决方案，但会帮助您找到问题所在。
由于无法在评论部分解释，请在答案部分添加代码
你的代码是正确的，除了你必须在 运行 语句之后写日志语句的主要方法，否则一切都是正确的，它应该记录。 仅供参考，引导默认日志级别设置为 INFO。
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
LOG.warn("********** Starting the application");
}