java常见log日志的使用方法解析

// 严重信息
public void severe(String msg) { log(Level.SEVERE, msg);}

// 警告信息
public void warning(String msg) { log(Level.WARNING, msg);}

// info信息
 public void info(String msg) {log(Level.INFO, msg);}

// 设定配置信息
public void config(String msg) {log(Level.CONFIG, msg);}

// 级别小信息
public void fine(String msg) {log(Level.FINE, msg);}

// 级别更小信息
public void finer(String msg) {log(Level.FINE, msg);}

// 级别最小信息
public void finest(String msg) {log(Level.FINE, msg);}

package com.gaokaoli.logger;
import java.util.logging.Logger;

public class text1 {
    public static void main(String []args){
        Logger logger = Logger.getLogger("text1");

        logger.severe("严重信息");
        logger.warning("警示信息");
        logger.info("info信息");

        logger.config("设定配置信息");
        logger.fine("级别小的信息");
        logger.finer("级别更小的信息");
        logger.finest("级别最小的信息");
    }
}

// 严重信息
public void severe(Supplier<String> msgSupplier) {log(Level.SEVERE, msgSupplier);}

// 警告信息
public void warning(Supplier<String> msgSupplier) {log(Level.WARNING, msgSupplier);}

// info信息
 public void info(Supplier<String> msgSupplier) {log(Level.INFO, msgSupplier); }

// 设定配置信息
public void config(Supplier<String> msgSupplier) {log(Level.CONFIG, msgSupplier);}

// 级别小信息
public void fine(Supplier<String> msgSupplier) {log(Level.FINE, msgSupplier);}

// 级别更小信息
public void finer(Supplier<String> msgSupplier) {log(Level.FINER, msgSupplier);}

// 级别最小信息
public void finest(Supplier<String> msgSupplier) {log(Level.FINEST, msgSupplier);}

<dependency>
       <groupId>org.apache.logging.log4j</groupId>
       <artifactId>log4j-api</artifactId>
       <version>2.14.1</version>
</dependency>

<dependency>
       <groupId>org.apache.logging.log4j</groupId>
       <artifactId>log4j-core</artifactId>
       <version>2.14.1</version>
</dependency>

package com.gaokaoli.logger;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;


public class test3 {
    public static void main(String []args){
        Logger logger = LogManager.getLogger("text3");
        logger.fatal("fatal错误");
        logger.error("error错误");
        logger.warn("warn警示");
        logger.info("info基本信息");
        logger.debug("debug调试");
        logger.trace("trace 信息");
    }
}

<dependency>
	<groupId>org.slf4j</groupId>
	<artifactId>slf4j-simple</artifactId>
	<version>1.7.25</version>
	<scope>compile</scope>
</dependency>

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class text2 {
    public static final Logger logger = LoggerFactory.getLogger(text2.class);
    public static void main(String []args){
        logger.error("error错误");
        logger.warn("warn警示");
        logger.info("info基本信息");
        logger.debug("debug调试");
        logger.trace("trace信息");
    }
}