1、slf4j入门案例

	4.0.0
	com.example
	logging-test
	0.0.1-SNAPSHOT

	
		8
		8
	

	
		
			junit
			junit
			4.12
		

		
		
			org.slf4j
			slf4j-api
			1.7.32
		
		
		
			org.slf4j
			slf4j-simple
			1.7.32
		


	

	
		
			
				org.apache.maven.plugins
				maven-compiler-plugin
				3.8.1
				
					${maven.compiler.source}
					${maven.compiler.target}
					UTF-8
				
			
		
	

package com.example.test;

import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class TestSlf4j {

	private static final Logger LOGGER = LoggerFactory.getLogger(TestSlf4j.class);

	@Test
	public void testSlf4j() {
		// 打印日志信息
		LOGGER.error("error");
		LOGGER.warn("warn");
		LOGGER.info("info");
		LOGGER.debug("debug");
		LOGGER.trace("trace"); // 使用占位符输出日志信息
		String name = "lucy";
		Integer age = 18;
		LOGGER.info("{}今年{}岁了！", name, age); // 将系统异常信息写入日志
		try {
			int i = 1 / 0;
		} catch (Exception e) {
			// e.printStackTrace();
			LOGGER.info("出现异常：", e);
		}
	}

}

运行结果图