【Mybatis】09 日志工厂配置 & Log4J

什么是日志 Log?

系统日志是记录系统中硬件、软件和系统问题的信息，同时还可以监视系统中发生的事件。

用户可以通过它来检查错误发生的原因，或者寻找受到攻击时攻击者留下的痕迹。

系统日志包括系统日志、应用程序日志和安全日志。

【我感觉是一样的】

我们过往所采哟的办法：

SOUT打印

DEBUG调试

现在，我们使用日志工厂

在上回阅读官方文档指北时，可以看到这样一个东西

我们所要知道和掌握主要是

LOG4J & STDOUT_LOGING

第二个Mybatis自带提供的

如何使用？

STDOUT_LOGGING日志输出

Mybatis自带的标准输出日志，只需要在核心配置中设置即可

1、在核心配置文件设置setting标签

我们可以不需要打印了

每次执行，都会打印日志记录

我们可以清晰的看到程序具体是怎么执行的

Logging initialized using 'class org.apache.ibatis.logging.stdout.StdOutImpl' adapter.
Class not found: org.jboss.vfs.VFS
JBoss 6 VFS API is not available in this environment.
Class not found: org.jboss.vfs.VirtualFile
VFS implementation org.apache.ibatis.io.JBoss6VFS is not valid in this environment.
Using VFS adapter org.apache.ibatis.io.DefaultVFS
Find JAR URL: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/pojo
Not a JAR: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/pojo
Reader entry: User.class
Listing file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/pojo
Find JAR URL: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/pojo/User.class
Not a JAR: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/pojo/User.class
Reader entry: ����   1 _      H      I      J K
Checking to see if class cn.dai.pojo.User matches criteria [is assignable to Object]
PooledDataSource forcefully closed/removed all connections.
PooledDataSource forcefully closed/removed all connections.
PooledDataSource forcefully closed/removed all connections.
PooledDataSource forcefully closed/removed all connections.
Find JAR URL: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper
Not a JAR: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper
Reader entry: UserMapper.class
Reader entry: UserMapper.xml
Listing file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper
Find JAR URL: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper/UserMapper.class
Not a JAR: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper/UserMapper.class
Reader entry: ����   1    getUserList ()Ljava/util/List;     Signature &()Ljava/util/List<Lcn/dai/pojo/User;>; getUserById (I)Lcn/dai/pojo/User; addUser (Lcn/dai/pojo/User;)I updateUserById deleteUserById (I)I addUserByMap (Ljava/util/Map;)I 8(Ljava/util/Map<Ljava/lang/String;Ljava/lang/Object;>;)I getUserLike $(Ljava/lang/String;)Ljava/util/List; 8(Ljava/lang/String;)Ljava/util/List<Lcn/dai/pojo/User;>;
Find JAR URL: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper/UserMapper.xml
Not a JAR: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper/UserMapper.xml
Reader entry: <?xml version="1.0" encoding="UTF-8" ?>
Checking to see if class cn.dai.mapper.UserMapper matches criteria [is assignable to Object]
org.apache.ibatis.session.defaults.DefaultSqlSession@2781e022
Opening JDBC Connection
Created connection 689745064.
==>  Preparing: /* 这里填写我们的SQL语句 */ SELECT * FROM user;
==> Parameters:
<==    Columns: user_id, user_name, user_password
<==        Row: 1, 杰哥, 123456
<==        Row: 2, 阿伟, 123456
<==        Row: 3, 空条承太郎, 123456
<==        Row: 4, 乔鲁诺乔巴纳, 123456
<==        Row: 5, 迪奥布兰多, 123456
<==        Row: 6, 乔瑟夫乔斯达, 123456
<==        Row: 7, 乔纳森乔斯达, 123456
<==        Row: 8, 丽萨丽萨, 654321
<==        Row: 9, 东方仗助, 654321
<==        Row: 10, 东方定助, 654321
<==        Row: 11, 花京院典明, 654321
<==        Row: 12, 波鲁纳雷夫, 654321
<==        Row: 13, 吉良吉影, 654321
<==        Row: 14, 布加拉提, 654321
<==        Row: 15, 葛德米斯达, 131313
<==        Row: 18, 哈吉咩, 335577
<==      Total: 16
User(user_id=1, user_name=杰哥, user_password=123456)
User(user_id=2, user_name=阿伟, user_password=123456)
User(user_id=3, user_name=空条承太郎, user_password=123456)
User(user_id=4, user_name=乔鲁诺乔巴纳, user_password=123456)
User(user_id=5, user_name=迪奥布兰多, user_password=123456)
User(user_id=6, user_name=乔瑟夫乔斯达, user_password=123456)
User(user_id=7, user_name=乔纳森乔斯达, user_password=123456)
User(user_id=8, user_name=丽萨丽萨, user_password=654321)
User(user_id=9, user_name=东方仗助, user_password=654321)
User(user_id=10, user_name=东方定助, user_password=654321)
User(user_id=11, user_name=花京院典明, user_password=654321)
User(user_id=12, user_name=波鲁纳雷夫, user_password=654321)
User(user_id=13, user_name=吉良吉影, user_password=654321)
User(user_id=14, user_name=布加拉提, user_password=654321)
User(user_id=15, user_name=葛德米斯达, user_password=131313)
User(user_id=18, user_name=哈吉咩, user_password=335577)
Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@291caca8]
Returned connection 689745064 to pool.

Process finished with exit code 0

LOG4J 日志输出

1、先设置日志输出为LOG4J

2、依赖导入

Maven坐标

<!-- https://mvnrepository.com/artifact/log4j/log4j -->
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>

3、配置LOG4J的配置文件

src\main\resources\log4j.properties

#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/l4j.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

然后在需要使用日志的类中设置这个属性，

我们进行的一个简单的测试

import cn.dai.mapper.UserMapper;
import cn.dai.pojo.User;
import cn.dai.util.MybatisUtil;
import org.apache.ibatis.session.SqlSession;

import org.apache.log4j.Logger;
import org.junit.Test;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * @author ArkD42
 * @file Mybatis
 * @create 2020 - 05 - 04 - 8:33
 */
public class SqlSessionTest {

    private static Logger logger = Logger.getLogger(SqlSessionTest.class);

    @Test
    public void log4jTest(){
        logger.info("----------普通信息打印级别------------");
        logger.debug("----------调试打印级别------------");
        logger.error("----------错误查看打印级别------------");
    }
}

测试结果

在我们配置文件信息中的输出文件路径，现在也生成了

这里没有装log文件的插件支持，IDEA提示我们是否安装【看自己喜好】

在这里我们使用之前的测试

只需要添加一个即可

    @Test
    public void sqlSessionTest(){
        SqlSession sqlSession = MybatisUtil.getSqlSession(true);
        logger.info("开始输出");
        System.out.println(sqlSession);
        UserMapper mapper = sqlSession.getMapper(UserMapper.class);

        List<User> userList = mapper.getUserList();

        for (User user: userList) {
            System.out.println(user);
        }
        sqlSession.close();
    }

打印结果

[org.apache.ibatis.logging.LogFactory]-Logging initialized using 'class org.apache.ibatis.logging.log4j.Log4jImpl' adapter.
[org.apache.ibatis.logging.LogFactory]-Logging initialized using 'class org.apache.ibatis.logging.log4j.Log4jImpl' adapter.
[org.apache.ibatis.io.VFS]-Class not found: org.jboss.vfs.VFS
[org.apache.ibatis.io.JBoss6VFS]-JBoss 6 VFS API is not available in this environment.
[org.apache.ibatis.io.VFS]-Class not found: org.jboss.vfs.VirtualFile
[org.apache.ibatis.io.VFS]-VFS implementation org.apache.ibatis.io.JBoss6VFS is not valid in this environment.
[org.apache.ibatis.io.VFS]-Using VFS adapter org.apache.ibatis.io.DefaultVFS
[org.apache.ibatis.io.DefaultVFS]-Find JAR URL: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/pojo
[org.apache.ibatis.io.DefaultVFS]-Not a JAR: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/pojo
[org.apache.ibatis.io.DefaultVFS]-Reader entry: User.class
[org.apache.ibatis.io.DefaultVFS]-Listing file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/pojo
[org.apache.ibatis.io.DefaultVFS]-Find JAR URL: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/pojo/User.class
[org.apache.ibatis.io.DefaultVFS]-Not a JAR: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/pojo/User.class
[org.apache.ibatis.io.DefaultVFS]-Reader entry: ����   1 _      H      I      J K
[org.apache.ibatis.io.ResolverUtil]-Checking to see if class cn.dai.pojo.User matches criteria [is assignable to Object]
[org.apache.ibatis.datasource.pooled.PooledDataSource]-PooledDataSource forcefully closed/removed all connections.
[org.apache.ibatis.datasource.pooled.PooledDataSource]-PooledDataSource forcefully closed/removed all connections.
[org.apache.ibatis.datasource.pooled.PooledDataSource]-PooledDataSource forcefully closed/removed all connections.
[org.apache.ibatis.datasource.pooled.PooledDataSource]-PooledDataSource forcefully closed/removed all connections.
[org.apache.ibatis.io.DefaultVFS]-Find JAR URL: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper
[org.apache.ibatis.io.DefaultVFS]-Not a JAR: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper
[org.apache.ibatis.io.DefaultVFS]-Reader entry: UserMapper.class
[org.apache.ibatis.io.DefaultVFS]-Reader entry: UserMapper.xml
[org.apache.ibatis.io.DefaultVFS]-Listing file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper
[org.apache.ibatis.io.DefaultVFS]-Find JAR URL: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper/UserMapper.class
[org.apache.ibatis.io.DefaultVFS]-Not a JAR: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper/UserMapper.class
[org.apache.ibatis.io.DefaultVFS]-Reader entry: ����   1    getUserList ()Ljava/util/List;     Signature &()Ljava/util/List<Lcn/dai/pojo/User;>; getUserById (I)Lcn/dai/pojo/User; addUser (Lcn/dai/pojo/User;)I updateUserById deleteUserById (I)I addUserByMap (Ljava/util/Map;)I 8(Ljava/util/Map<Ljava/lang/String;Ljava/lang/Object;>;)I getUserLike $(Ljava/lang/String;)Ljava/util/List; 8(Ljava/lang/String;)Ljava/util/List<Lcn/dai/pojo/User;>;
[org.apache.ibatis.io.DefaultVFS]-Find JAR URL: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper/UserMapper.xml
[org.apache.ibatis.io.DefaultVFS]-Not a JAR: file:/C:/Users/Administrator/IdeaProjects/Mybatis/Mybatis02%20-%20Configure/target/classes/cn/dai/mapper/UserMapper.xml
[org.apache.ibatis.io.DefaultVFS]-Reader entry: <?xml version="1.0" encoding="UTF-8" ?>
[org.apache.ibatis.io.ResolverUtil]-Checking to see if class cn.dai.mapper.UserMapper matches criteria [is assignable to Object]
[SqlSessionTest]-开始输出
org.apache.ibatis.session.defaults.DefaultSqlSession@192d3247
[org.apache.ibatis.transaction.jdbc.JdbcTransaction]-Opening JDBC Connection
[org.apache.ibatis.datasource.pooled.PooledDataSource]-Created connection 532087022.
[cn.dai.mapper.UserMapper.getUserList]-==>  Preparing: /* 这里填写我们的SQL语句 */ SELECT * FROM user;
[cn.dai.mapper.UserMapper.getUserList]-==> Parameters:
[cn.dai.mapper.UserMapper.getUserList]-<==      Total: 16
User(user_id=1, user_name=杰哥, user_password=123456)
User(user_id=2, user_name=阿伟, user_password=123456)
User(user_id=3, user_name=空条承太郎, user_password=123456)
User(user_id=4, user_name=乔鲁诺乔巴纳, user_password=123456)
User(user_id=5, user_name=迪奥布兰多, user_password=123456)
User(user_id=6, user_name=乔瑟夫乔斯达, user_password=123456)
User(user_id=7, user_name=乔纳森乔斯达, user_password=123456)
User(user_id=8, user_name=丽萨丽萨, user_password=654321)
User(user_id=9, user_name=东方仗助, user_password=654321)
User(user_id=10, user_name=东方定助, user_password=654321)
User(user_id=11, user_name=花京院典明, user_password=654321)
User(user_id=12, user_name=波鲁纳雷夫, user_password=654321)
User(user_id=13, user_name=吉良吉影, user_password=654321)
User(user_id=14, user_name=布加拉提, user_password=654321)
User(user_id=15, user_name=葛德米斯达, user_password=131313)
User(user_id=18, user_name=哈吉咩, user_password=335577)
[org.apache.ibatis.transaction.jdbc.JdbcTransaction]-Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@1fb700ee]
[org.apache.ibatis.datasource.pooled.PooledDataSource]-Returned connection 532087022 to pool.

Process finished with exit code 0