mybatis项目中添加logback日志
1、pom.xml
org.mybatis mybatis mysql mysql-connector-java org.junit.jupiter junit-jupiter-api org.projectlombok lombok ch.qos.logback logback-classic 2、logback.xml
[%d{HH:mm:ss.SSS}] [%-5level] [%thread] [%logger] [%msg]%n UTF-8 3、建库建表
CREATE DATABASE `mybatis-example`; USE `mybatis-example`; CREATE TABLE `t_emp`( emp_id INT AUTO_INCREMENT, emp_name CHAR(100), emp_salary DOUBLE(10,5), PRIMARY KEY(emp_id) ); INSERT INTO `t_emp`(emp_name,emp_salary) VALUES("tom",200.33); INSERT INTO `t_emp`(emp_name,emp_salary) VALUES("jerry",666.66); INSERT INTO `t_emp`(emp_name,emp_salary) VALUES("andy",777.77);4、Employee.java
package com.atguigu.mybatis.pojo; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; @Data @NoArgsConstructor @AllArgsConstructor public class Employee { private Integer empId; private String empName; private Double empSalary; }5、mybatis-config.xml（mybatis的总配置文件）
6、MybatisTest.java
package com.atguigu.mybatis; import com.atguigu.mybatis.mapper.EmpMapper; import org.apache.ibatis.io.Resources; import org.apache.ibatis.session.SqlSession; import org.apache.ibatis.session.SqlSessionFactory; import org.apache.ibatis.session.SqlSessionFactoryBuilder; import org.junit.jupiter.api.AfterEach; import org.junit.jupiter.api.BeforeEach; import org.junit.jupiter.api.Test; import java.io.IOException; import java.io.InputStream; public class MybatisTest { SqlSessionFactory sqlSessionFactory; SqlSession sqlSession; EmpMapper empMapper; @BeforeEach public void setup() throws IOException { // 获取资源流，读取"mybatis-config.xml"文件 InputStream inputStream = Resources.getResourceAsStream("mybatis-config.xml"); // 使用资源流创建SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream); // 使用SqlSessionFactory打开一个Session sqlSession = sqlSessionFactory.openSession(); // 使用Session获取EmpMapper的Mapper对象 empMapper = sqlSession.getMapper(EmpMapper.class); } // 在每个测试用例之后执行的清理方法 @AfterEach public void teardown() { sqlSession.close(); // 关闭SqlSession } @Test public void getEmployeeListTest() { empMapper.getEmployeeList().forEach(System.out::println); } //Employee(empId=1, empName=tom, empSalary=200.33) //Employee(empId=2, empName=jerry, empSalary=666.66) //Employee(empId=3, empName=andy, empSalary=777.77) @Test public void getEmployeeByIdTest() throws IOException { System.out.println(empMapper.getEmployeeById(1)); //Employee(empId=1, empName=tom, empSalary=200.33) } }D:\Java\jdk-17\bin\java.exe -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:D:\BaiduNetdiskDownload\IntelliJ IDEA 2023.2\lib\idea_rt.jar=18702:D:\BaiduNetdiskDownload\IntelliJ IDEA 2023.2\bin" -Dfile.encoding=UTF-8 -classpath "D:\develop\maven\repository\org\junit\platform\junit-platform-launcher\1.3.1\junit-platform-launcher-1.3.1.jar;D:\develop\maven\repository\org\apiguardian\apiguardian-api\1.0.0\apiguardian-api-1.0.0.jar;D:\develop\maven\repository\org\junit\platform\junit-platform-engine\1.3.1\junit-platform-engine-1.3.1.jar;D:\develop\maven\repository\org\junit\platform\junit-platform-commons\1.3.1\junit-platform-commons-1.3.1.jar;D:\develop\maven\repository\org\opentest4j\opentest4j\1.1.1\opentest4j-1.1.1.jar;D:\develop\maven\repository\org\junit\jupiter\junit-jupiter-engine\5.3.1\junit-jupiter-engine-5.3.1.jar;D:\develop\maven\repository\org\junit\jupiter\junit-jupiter-api\5.3.1\junit-jupiter-api-5.3.1.jar;D:\BaiduNetdiskDownload\IntelliJ IDEA 2023.2\lib\idea_rt.jar;D:\BaiduNetdiskDownload\IntelliJ IDEA 2023.2\plugins\junit\lib\junit5-rt.jar;D:\BaiduNetdiskDownload\IntelliJ IDEA 2023.2\plugins\junit\lib\junit-rt.jar;F:\IdeaProjects\workspace\pro-ssm\pro18-mybatis-begin\target\test-classes;F:\IdeaProjects\workspace\pro-ssm\pro18-mybatis-begin\target\classes;F:\my_java\maven_repository\org\mybatis\mybatis\3.5.11\mybatis-3.5.11.jar;F:\my_java\maven_repository\mysql\mysql-connector-java\8.0.25\mysql-connector-java-8.0.25.jar;F:\my_java\maven_repository\com\google\protobuf\protobuf-java\3.11.4\protobuf-java-3.11.4.jar;F:\my_java\maven_repository\org\junit\jupiter\junit-jupiter-api\5.3.1\junit-jupiter-api-5.3.1.jar;F:\my_java\maven_repository\org\apiguardian\apiguardian-api\1.0.0\apiguardian-api-1.0.0.jar;F:\my_java\maven_repository\org\opentest4j\opentest4j\1.1.1\opentest4j-1.1.1.jar;F:\my_java\maven_repository\org\junit\platform\junit-platform-commons\1.3.1\junit-platform-commons-1.3.1.jar;F:\my_java\maven_repository\org\projectlombok\lombok\1.18.20\lombok-1.18.20.jar;F:\my_java\maven_repository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;F:\my_java\maven_repository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;F:\my_java\maven_repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar" com.intellij.rt.junit.JUnitStarter -ideVersion5 -junit5 com.atguigu.mybatis.MybatisTest,getEmployeeListTest 19:39:19,463 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml] 19:39:19,463 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.groovy] 19:39:19,463 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/F:/IdeaProjects/workspace/pro-ssm/pro18-mybatis-begin/target/classes/logback.xml] 19:39:19,537 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender] 19:39:19,540 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [STDOUT] 19:39:19,548 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property 19:39:19,575 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to DEBUG 19:39:19,575 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [STDOUT] to Logger[ROOT] 19:39:19,576 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.atguigu.mybatis] to DEBUG 19:39:19,576 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration. 19:39:19,577 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@62230c58 - Registering current configuration as safe fallback point [19:39:19.582] [DEBUG] [main] [org.apache.ibatis.logging.LogFactory] [Logging initialized using 'class org.apache.ibatis.logging.slf4j.Slf4jImpl' adapter.] [19:39:19.596] [DEBUG] [main] [org.apache.ibatis.datasource.pooled.PooledDataSource] [PooledDataSource forcefully closed/removed all connections.] [19:39:19.596] [DEBUG] [main] [org.apache.ibatis.datasource.pooled.PooledDataSource] [PooledDataSource forcefully closed/removed all connections.] [19:39:19.596] [DEBUG] [main] [org.apache.ibatis.datasource.pooled.PooledDataSource] [PooledDataSource forcefully closed/removed all connections.] [19:39:19.596] [DEBUG] [main] [org.apache.ibatis.datasource.pooled.PooledDataSource] [PooledDataSource forcefully closed/removed all connections.] [19:39:19.682] [DEBUG] [main] [org.apache.ibatis.transaction.jdbc.JdbcTransaction] [Opening JDBC Connection] [19:39:20.235] [DEBUG] [main] [org.apache.ibatis.datasource.pooled.PooledDataSource] [Created connection 1193398802.] [19:39:20.236] [DEBUG] [main] [org.apache.ibatis.transaction.jdbc.JdbcTransaction] [Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@4721d212]] [19:39:20.239] [DEBUG] [main] [com.atguigu.mybatis.mapper.EmpMapper.getEmployeeList] [==> Preparing: select emp_id empId, emp_name empName, emp_salary empSalary from t_emp] [19:39:20.280] [DEBUG] [main] [com.atguigu.mybatis.mapper.EmpMapper.getEmployeeList] [==> Parameters: ] [19:39:20.320] [DEBUG] [main] [com.atguigu.mybatis.mapper.EmpMapper.getEmployeeList] [<== Total: 3] Employee(empId=1, empName=tom, empSalary=200.33) Employee(empId=2, empName=jerry, empSalary=666.66) Employee(empId=3, empName=andy, empSalary=777.77) [19:39:20.325] [DEBUG] [main] [org.apache.ibatis.transaction.jdbc.JdbcTransaction] [Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@4721d212]] [19:39:20.326] [DEBUG] [main] [org.apache.ibatis.transaction.jdbc.JdbcTransaction] [Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@4721d212]] [19:39:20.326] [DEBUG] [main] [org.apache.ibatis.datasource.pooled.PooledDataSource] [Returned connection 1193398802 to pool.] Process finished with exit code 0D:\Java\jdk-17\bin\java.exe -ea -Didea.test.cyclic.buffer.size=1048576 "-javaagent:D:\BaiduNetdiskDownload\IntelliJ IDEA 2023.2\lib\idea_rt.jar=18726:D:\BaiduNetdiskDownload\IntelliJ IDEA 2023.2\bin" -Dfile.encoding=UTF-8 -classpath "D:\develop\maven\repository\org\junit\platform\junit-platform-launcher\1.3.1\junit-platform-launcher-1.3.1.jar;D:\develop\maven\repository\org\apiguardian\apiguardian-api\1.0.0\apiguardian-api-1.0.0.jar;D:\develop\maven\repository\org\junit\platform\junit-platform-engine\1.3.1\junit-platform-engine-1.3.1.jar;D:\develop\maven\repository\org\junit\platform\junit-platform-commons\1.3.1\junit-platform-commons-1.3.1.jar;D:\develop\maven\repository\org\opentest4j\opentest4j\1.1.1\opentest4j-1.1.1.jar;D:\develop\maven\repository\org\junit\jupiter\junit-jupiter-engine\5.3.1\junit-jupiter-engine-5.3.1.jar;D:\develop\maven\repository\org\junit\jupiter\junit-jupiter-api\5.3.1\junit-jupiter-api-5.3.1.jar;D:\BaiduNetdiskDownload\IntelliJ IDEA 2023.2\lib\idea_rt.jar;D:\BaiduNetdiskDownload\IntelliJ IDEA 2023.2\plugins\junit\lib\junit5-rt.jar;D:\BaiduNetdiskDownload\IntelliJ IDEA 2023.2\plugins\junit\lib\junit-rt.jar;F:\IdeaProjects\workspace\pro-ssm\pro18-mybatis-begin\target\test-classes;F:\IdeaProjects\workspace\pro-ssm\pro18-mybatis-begin\target\classes;F:\my_java\maven_repository\org\mybatis\mybatis\3.5.11\mybatis-3.5.11.jar;F:\my_java\maven_repository\mysql\mysql-connector-java\8.0.25\mysql-connector-java-8.0.25.jar;F:\my_java\maven_repository\com\google\protobuf\protobuf-java\3.11.4\protobuf-java-3.11.4.jar;F:\my_java\maven_repository\org\junit\jupiter\junit-jupiter-api\5.3.1\junit-jupiter-api-5.3.1.jar;F:\my_java\maven_repository\org\apiguardian\apiguardian-api\1.0.0\apiguardian-api-1.0.0.jar;F:\my_java\maven_repository\org\opentest4j\opentest4j\1.1.1\opentest4j-1.1.1.jar;F:\my_java\maven_repository\org\junit\platform\junit-platform-commons\1.3.1\junit-platform-commons-1.3.1.jar;F:\my_java\maven_repository\org\projectlombok\lombok\1.18.20\lombok-1.18.20.jar;F:\my_java\maven_repository\ch\qos\logback\logback-classic\1.2.3\logback-classic-1.2.3.jar;F:\my_java\maven_repository\ch\qos\logback\logback-core\1.2.3\logback-core-1.2.3.jar;F:\my_java\maven_repository\org\slf4j\slf4j-api\1.7.25\slf4j-api-1.7.25.jar" com.intellij.rt.junit.JUnitStarter -ideVersion5 -junit5 com.atguigu.mybatis.MybatisTest,getEmployeeByIdTest 19:40:00,097 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback-test.xml] 19:40:00,097 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Could NOT find resource [logback.groovy] 19:40:00,097 |-INFO in ch.qos.logback.classic.LoggerContext[default] - Found resource [logback.xml] at [file:/F:/IdeaProjects/workspace/pro-ssm/pro18-mybatis-begin/target/classes/logback.xml] 19:40:00,180 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - About to instantiate appender of type [ch.qos.logback.core.ConsoleAppender] 19:40:00,184 |-INFO in ch.qos.logback.core.joran.action.AppenderAction - Naming appender as [STDOUT] 19:40:00,190 |-INFO in ch.qos.logback.core.joran.action.NestedComplexPropertyIA - Assuming default type [ch.qos.logback.classic.encoder.PatternLayoutEncoder] for [encoder] property 19:40:00,218 |-INFO in ch.qos.logback.classic.joran.action.RootLoggerAction - Setting level of ROOT logger to DEBUG 19:40:00,219 |-INFO in ch.qos.logback.core.joran.action.AppenderRefAction - Attaching appender named [STDOUT] to Logger[ROOT] 19:40:00,220 |-INFO in ch.qos.logback.classic.joran.action.LoggerAction - Setting level of logger [com.atguigu.mybatis] to DEBUG 19:40:00,220 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - End of configuration. 19:40:00,221 |-INFO in ch.qos.logback.classic.joran.JoranConfigurator@62230c58 - Registering current configuration as safe fallback point [19:40:00.226] [DEBUG] [main] [org.apache.ibatis.logging.LogFactory] [Logging initialized using 'class org.apache.ibatis.logging.slf4j.Slf4jImpl' adapter.] [19:40:00.242] [DEBUG] [main] [org.apache.ibatis.datasource.pooled.PooledDataSource] [PooledDataSource forcefully closed/removed all connections.] [19:40:00.242] [DEBUG] [main] [org.apache.ibatis.datasource.pooled.PooledDataSource] [PooledDataSource forcefully closed/removed all connections.] [19:40:00.242] [DEBUG] [main] [org.apache.ibatis.datasource.pooled.PooledDataSource] [PooledDataSource forcefully closed/removed all connections.] [19:40:00.242] [DEBUG] [main] [org.apache.ibatis.datasource.pooled.PooledDataSource] [PooledDataSource forcefully closed/removed all connections.] [19:40:00.316] [DEBUG] [main] [org.apache.ibatis.transaction.jdbc.JdbcTransaction] [Opening JDBC Connection] [19:40:00.869] [DEBUG] [main] [org.apache.ibatis.datasource.pooled.PooledDataSource] [Created connection 1626852381.] [19:40:00.870] [DEBUG] [main] [org.apache.ibatis.transaction.jdbc.JdbcTransaction] [Setting autocommit to false on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@60f7cc1d]] [19:40:00.874] [DEBUG] [main] [com.atguigu.mybatis.mapper.EmpMapper.getEmployeeById] [==> Preparing: select emp_id empId, emp_name empName, emp_salary empSalary from t_emp where emp_id = ?] [19:40:00.918] [DEBUG] [main] [com.atguigu.mybatis.mapper.EmpMapper.getEmployeeById] [==> Parameters: 1(Integer)] [19:40:00.961] [DEBUG] [main] [com.atguigu.mybatis.mapper.EmpMapper.getEmployeeById] [<== Total: 1] Employee(empId=1, empName=tom, empSalary=200.33) [19:40:00.965] [DEBUG] [main] [org.apache.ibatis.transaction.jdbc.JdbcTransaction] [Resetting autocommit to true on JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@60f7cc1d]] [19:40:00.966] [DEBUG] [main] [org.apache.ibatis.transaction.jdbc.JdbcTransaction] [Closing JDBC Connection [com.mysql.cj.jdbc.ConnectionImpl@60f7cc1d]] [19:40:00.966] [DEBUG] [main] [org.apache.ibatis.datasource.pooled.PooledDataSource] [Returned connection 1626852381 to pool.] Process finished with exit code 0
7、SLF4J
SLF4J，即 简单日志门面（Simple Logging Facade for Java），不是具体的日志解决方案，它只服务于各种各样的日志系统。按照官方的说法，SLF4J是一个用于日志系统的简单Facade，允许最终用户在部署其应用时使用其所希望的日志系统。实际上，SLF4J所提供的核心API是一些接口以及一个LoggerFactory的工厂类。
使用SLF4J的时候，不需要在代码中或配置文件中指定你打算使用那个具体的日志系统。如同使用JDBC基本不用考虑具体数据库一样，SLF4J提供了统一的记录日志的接口，只要按照其提供的方法记录即可，最终日志的格式、记录级别、输出方式等通过具体日志系统的配置来实现，因此可以在应用中灵活切换日志系统。