spring项目记录日志

Java项目记录日志目前有log4j、logback、log4j2

现在用最新的log4j2为例记录日志

1.配置maven

//1.移除springweb自带的日志      
 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>jul-to-slf4j</artifactId>
                    <groupId>org.slf4j</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>log4j-api</artifactId>
                    <groupId>org.apache.logging.log4j</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>log4j-to-slf4j</artifactId>
                    <groupId>org.apache.logging.log4j</groupId>
                </exclusion>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
//2.引入log4j2
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.19.0</version>
            <exclusions>
                <exclusion>
                    <groupId>org.apache.logging.log4j</groupId>
                    <artifactId>log4j-api</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>2.19.0</version>
        </dependency>
//3.引入lombok，方便记录日志
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.18.24</version>
            <scope>compile</scope>
        </dependency>

2.配置log4j2.properties

status = warn
name = tool

filter.threshold.type = ThresholdFilter
filter.threshold.level = info

appender.console.type = Console
appender.console.name = STDOUT
appender.console.layout.type = PatternLayout
appender.console.layout.pattern = [%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n

appender.rolling.type = File
appender.rolling.name = log
appender.rolling.append = true
appender.rolling.fileName = logs/tool.log
appender.rolling.layout.type = PatternLayout
appender.rolling.layout.pattern = [%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} - %msg%n

rootLogger.level = info
rootLogger.appenderRef.stdout.ref = STDOUT
rootLogger.appenderRef.log.ref = log

3.使用案例

@Log4j2
public class Demo{
   private static void init() {  
       log.info("开始：a={},b={}", a, b);       
	try {
	   //do sth
	} catch (Exception ex) {
	   log.error("error",ex);
	} 
   }
}