柚子快報(bào)邀請(qǐng)碼778899分享：log4j(日志的配置)

http://yzkb.51969.com/

日志一般配置在resources的config下面的，并且Util當(dāng)中的initLogRecord中的initLog（）方法就是加載這個(gè)log4j.properties的.

首先先看log4j.properties的配置文件

log4j.rootLogger=debug, stdout, R

log4j.appender.stdout=org.apache.log4j.ConsoleAppender

log4j.appender.stdout.layout=org.apache.log4j.PatternLayout

# Pattern to output the caller's file name and line number.

log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n

log4j.appender.R=org.apache.log4j.RollingFileAppender

log4j.appender.R.File=example.log

log4j.appender.R.MaxFileSize=100KB

# Keep one backup file

log4j.appender.R.MaxBackupIndex=5

log4j.appender.R.layout=org.apache.log4j.PatternLayout

log4j.appender.R.layout.ConversionPattern=%p %t %c - %m%n

然后看Util包當(dāng)中的initLogRecord代碼

package Util;

import org.apache.log4j.PropertyConfigurator;

import java.io.FileInputStream;

import java.io.IOException;

import java.util.Properties;

public class initLogRecord {

public static void initLog() {

FileInputStream fileInputStream = null;

try {

Properties properties = new Properties();

fileInputStream = new FileInputStream("src/main/resources/config/log4j.properties");

properties.load(fileInputStream);

PropertyConfigurator.configure(properties);

} catch (Exception e) {

e.printStackTrace();

} finally {

if (fileInputStream != null) {

try {

fileInputStream.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}

}

???? 下面找個(gè)例子測(cè)試一下這個(gè)日志??? 當(dāng)中initLogRecord.initLog();就是查看日志的

/**

* 查找所有數(shù)據(jù) 和日志

* @throws IOException

*/

@Test

public void findAll() throws IOException {

initLogRecord.initLog();

//1.讀取mybatis的核心配置文件

InputStream in = Resources.getResourceAsStream("config/mybatis-config.xml");

//2.通過配置信息獲取一個(gè)SqlSessionFactory

SqlSessionFactory build = new SqlSessionFactoryBuilder().build(in);

//3.通過工廠獲取一個(gè)sqlSession對(duì)象

SqlSession sqlSession = build.openSession();

//4.通過空間名+id找到要執(zhí)行的sql語句并執(zhí)行sql語句

List list = sqlSession.selectList("studentsMapper.findAll");

for (students students : list) {

System.out.println(students);

}

}

結(jié)果展示

最后切記，一定要在maven的配置當(dāng)中導(dǎo)入log4j坐標(biāo)?

log4j

log4j

1.2.12

柚子快報(bào)邀請(qǐng)碼778899分享：log4j(日志的配置)

http://yzkb.51969.com/

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