【Log4j2】Spring 整合 Log4j2 日志框架

超、凢脫俗 2023-10-07 23:08 0阅读 0赞

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#### Log4j2日志框架 ####

*  一、添加Maven依赖
 *  二、添加日志配置文件
 *  三、测试案例
 *   *  ⚪组件类
     *  ⚪XML配置文件
     *  ⚪测试
 *  四、手动使用日志
 *   *  ⚪创建Logger类型对象
     *  ⚪设置日志内容

## 一、添加Maven依赖 ##

--------------------

<dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-core</artifactId>
                <version>2.19.0</version>
            </dependency>
            <dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-slf4j2-impl</artifactId>
                <version>2.19.0</version>
            </dependency>

## 二、添加日志配置文件 ##

--------------------

*  文件名固定为：`log4j2.xml`，文件必须放到类的根路径下

![在这里插入图片描述][a1203b4dfb034ec2b268c4a6549ad689.png_pic_center]

`XML配置文件内容` ：

<?xml version="1.0" encoding="UTF-8"?>
    <configuration>
        <loggers>
            
            <root level="DEBUG">
                <appender-ref ref="spring6log"/>
                <appender-ref ref="RollingFile"/>
                <appender-ref ref="log"/>
            </root>
        </loggers>
    
        <appenders>
            
            <console name="spring6log" target="SYSTEM_OUT">
                
                <PatternLayout pattern="%d{yyyy-MM-dd HH:mm:ss SSS} [%t] %-3level %logger{1024} - %msg%n"/>
            </console>
    
            
            <File name="log" fileName="d:/spring6_log/test.log" append="false">
                <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %class{36} %L %M - %msg%xEx%n"/>
            </File>
    
            
            <RollingFile name="RollingFile" fileName="d:/spring6_log/app.log"
                         filePattern="log/$${date:yyyy-MM}/app-%d{MM-dd-yyyy}-%i.log.gz">
                <PatternLayout pattern="%d{yyyy-MM-dd 'at' HH:mm:ss z} %-5level %class{36} %L %M - %msg%xEx%n"/>
                <SizeBasedTriggeringPolicy size="50MB"/>
                
                <DefaultRolloverStrategy max="20"/>
            </RollingFile>
        </appenders>
    </configuration>

## 三、测试案例 ##

--------------------

### ⚪组件类 ###

package com.haojin.spring6;
    
    /**
     * @author .29.
     * @create 2023-02-01 17:05
     */
    public class hello {
        
        public hello(){
        
            System.out.println("执行了空参构造方法...");
        }
    
        public void helloWorld(){
        
            System.out.println("Hello World！");
        }
    
    
    }

### ⚪XML配置文件 ###

### ⚪测试 ###

import com.haojin.spring6.hello;
    import org.junit.jupiter.api.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    /**
     * @author .29.
     * @create 2023-02-01 17:07
     */
    public class TestHello {
        
    
        @Test
        public void test1(){
        
    
            ApplicationContext context =
                    new ClassPathXmlApplicationContext("bean.xml");
    
            hello hello = context.getBean("hello", hello.class);
    
            System.out.println("hello = " + hello);
    
            System.out.print("method result : ");
            hello.helloWorld();
        }
    }

![在这里插入图片描述][99626945ebd546b59cfac9d8cfd6d2df.png]

顶部自动打印 日志

## 四、手动使用日志 ##

--------------------

### ⚪创建Logger类型对象 ###

LoggerFactory.getLogger()方法获取对象

private Logger logger = LoggerFactory.getLogger(HelloWorldTest.class);

### ⚪设置日志内容 ###

调用方法设置内容

logger.info("测试完成...");

`完整测试类` ：

public class TestHello {
        
        // LoggerFactory.getLogger()方法获取Logger类型对象
        private Logger logger = LoggerFactory.getLogger(TestHello.class);
    
        @Test
        public void test1(){
        
    
            ApplicationContext context =
                    new ClassPathXmlApplicationContext("bean.xml");
    
            hello hello = context.getBean("hello", hello.class);
    
            System.out.println("hello = " + hello);
    
            System.out.print("method result : ");
            hello.helloWorld();
            
            //设置日志内容
            logger.info("测试完成...");
        }
    }

> ![在这里插入图片描述][7558d098462549d1b62f2dc53655040f.png]

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[fd543646dabc428c98339174c5fbe018.png_pic_center 1]: https://blog.csdn.net/ebb29bbe/category_12171996.html?spm=1001.2014.3001.5482
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[20a7f1b58dfb4660b75d7f021c157d57.png_pic_center 1]: https://blog.csdn.net/ebb29bbe?type=blog