配置总结
1、父工程pom依赖
<!-- 导入依赖-->
<dependencies>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.47</version>
</dependency>
<!-- mybatis驱动 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.5.2</version>
</dependency>
<!-- junit测试包 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<!-- log4j日志 -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!-- lombok -->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
</dependency>
</dependencies>
<!--在build中配置resources，来防止我们资源导出失败的问题-->
<build>
<resources>
<resource>
<directory>src/main/resources</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
</resource>
<resource>
<directory>src/main/java</directory>
<includes>
<include>**/*.properties</include>
<include>**/*.xml</include>
</includes>
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>16</source>
<target>16</target>
</configuration>
</plugin>
</plugins>
</build>
2、mybatis-config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<!--configuration 核心配置文件-->
<configuration>
<!-- 引入外部配置文件-->
<properties resource="db.properties"/>
<!-- 日志设置-->
<settings>
<setting name="logImpl" value="LOG4J"/>
</settings>
<!-- 别名优化-->
<typeAliases>
<package name="com.luo.pojo"/>
</typeAliases>
<environments default="development">
<environment id="development">
<transactionManager type="JDBC"/>
<dataSource type="POOLED">
<property name="driver" value="${driver}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
</dataSource>
</environment>
</environments>
<!-- 每一个mapper.xml都需要在这个mybatis核心文件中注册-->
<mappers>
</mappers>
</configuration>
3、db.properties
driver = com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/demo?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC
username=root
password=123456
4、log4j.properties
#????DEBUG????????console?file???????console?file?????????
log4j.rootLogger=DEBUG,console,file
#??????????
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
#?????????
log4j.appender.file = org.apache.log4j.RollingFileAppender
log4j.appender.file.File=./log/luo.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
#??????
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
5、MybatisUtils
//sqlsessionFactory构建sqlsession
public class MyBatisUtils {
private static SqlSessionFactory factory=null;
static {
try {
String resource = "mybatis-config.xml";
InputStream in= Resources.getResourceAsStream(resource);
//创建SqlSessionFactory对象
factory=new SqlSessionFactoryBuilder().build(in);
} catch (IOException e) {
e.printStackTrace();
}
}
//获取SqlSession的方法
public static SqlSession getSqlSession() {
SqlSession sqlSession=null;
if(factory!=null) {
//如果不设置参数或者参数为false就是手动提交事务，参数设置为true就是自动提交事务
sqlSession=factory.openSession(true);
}
return sqlSession;
}
}
6、IDutils
//生成随机id的工具类
public class IDutils {
public static String getId(){
return UUID.randomUUID().toString().replaceAll("-","");
}
@Test
public void test(){
System.out.println(IDutils.getId());
}
}
7、mappper.xml文件开头
<?xml version="1.0" encoding="UTF8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="">
8、测试文件
public class myTest {
@Test
public void test(){
SqlSession sqlSession = MyBatisUtils.getSqlSession();
BlogMapper mapper = sqlSession.getMapper(BlogMapper.class);
////////
sqlSession.close();
}
}
9、工程结构
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