mybatis中log4j使用

1.在pom.xml中引入maven依赖

<dependency>
   <groupId>log4j</groupId>
   <artifactId>log4j</artifactId>
   <version>1.2.17</version>
</dependency>

2.在resources文件夹下编写log4j.properties配置文件

#将等级为DEBUG的日志信息输出到console和file这两个目的地，console和file的定义在下面的代码
log4j.rootLogger=DEBUG,console,file

#控制台输出的相关设置
log4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.Target = System.out
log4j.appender.console.Threshold=DEBUG
log4j.appender.console.layout = org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=[%c]-%m%n

#文件输出的相关设置
log4j.appender.file = org.apache.log4j.RollingFileAppender
log4j.appender.file.File=./log/xiaoma.log
log4j.appender.file.MaxFileSize=10mb
log4j.appender.file.Threshold=DEBUG
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=[%p][%d{yy-MM-dd}][%c]%m%n

#日志输出级别
log4j.logger.org.mybatis=DEBUG
log4j.logger.java.sql=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.ResultSet=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG

3.在mybatis-config.xml核心配置文件中添加log4j配置

<settings>
   <setting name="logImpl" value="LOG4J"/>
</settings>

 4.编写测试文件

package com.xiaoma;

import com.xiaoma.entity.User;
import com.xiaoma.mapper.UserMapper;
import com.xiaoma.util.ConnectMySQLUtil;
import org.apache.ibatis.session.SqlSession;
import org.junit.Test;

import java.util.List;

public class test {
    static Logger logger = Logger.getLogger(MyTest.class);
    @Test
    public void selectUser() {
       logger.info("info：进入selectUser方法");
       logger.debug("debug：进入selectUser方法");
       logger.error("error: 进入selectUser方法");
       SqlSession session = MybatisUtils.getSession();
       UserMapper mapper = session.getMapper(UserMapper.class);
       List<User> users = mapper.selectUser();
       for (User user: users){
           System.out.println(user);
      }
       session.close();
    } 
}