折腾：
【未解决】VSCode中用Java的Spring Boot搭建智能电力系统后端框架
期间，参考之前的：
【已解决】java的log4j2中没有生成File类型的log文件
去加上日志，输出日志到文件
然后遇到：
【已解决】spring boot中已配置log4j2有console的log输出但是没有生成日志文件
但是同时能看到很多log，感觉好像不太对，哪些方面除了问题似的。
不过后来发现貌似是没问题的。
然后不过需要去优化配置：
【已解决】java中log4j2中配置日志的level不同：console是INFO而file是DEBUG
【总结】
最后，给spring boot的log4j2的配置如下：
src/server/xxx/xxx/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>2.2.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.crifan</groupId>
<artifactId>xxx</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>xxx</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<log4j2.version>2.13.0</log4j2.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</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-log4j2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
<optional>true</optional>
</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>com.jayway.jsonpath</groupId>
<artifactId>json-path</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>${log4j2.version}</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.30</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>src/server/xxx/xxx/src/main/resources/log4j2.xml
<?xml version="1.0" encoding="UTF-8"?>
<Configuration>
<Appenders>
<File name="FileLog" fileName="xxx.log" append="false">
<PatternLayout>
<Pattern>%d{yyyyMMdd HH:mm:ss} %-5p [%t] %C{2} %F%L - %m%n</Pattern>
</PatternLayout>
</File>
<Console name="ConsoleLog" target="SYSTEM_OUT">
<PatternLayout pattern="%d %-5p %F:%L - %m%n"/>
</Console>
</Appenders>
<Loggers>
<Root level="debug">
<AppenderRef ref="FileLog" level="debug"/>
<AppenderRef ref="ConsoleLog" level="info"/>
</Root>
</Loggers>
</Configuration>代码：
src/server/xxx/xxx/src/main/java/com/crifan/xxx/GreetingController.java
import org.slf4j.LoggerFactory;
@RestController
public class GreetingController {
private static Logger logger = LoggerFactory.getLogger(GreetingController.class);
@PostMapping...
public Greeting addMember(@RequestBody Map<String, Object> payload) {
logger.info("post greeting: payload={}", payload);
...效果：
