專案的pom.xml配置檔案

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.jCuckoo</groupId>
	<artifactId>MybatisTest</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>MybatisTest</name>
	<url>http://maven.apache.org</url>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	</properties>

	<dependencies>
		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
			<version>3.8.1</version>
			<scope>test</scope>
		</dependency>
		<!-- https://mvnrepository.com/artifact/org.mybatis/mybatis -->
		<dependency>
			<groupId>org.mybatis</groupId>
			<artifactId>mybatis</artifactId>
			<version>3.4.5</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<version>8.0.7-dmr</version>
		</dependency>
		<!-- https://mvnrepository.com/artifact/log4j/log4j -->
		<dependency>
			<groupId>log4j</groupId>
			<artifactId>log4j</artifactId>
			<version>1.2.17</version>
		</dependency>

	</dependencies>
</project>
 

<?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>
	<typeAliases>
		<!-- 一次指定一個類的別名 -->
		<typeAlias alias="role" type="com.jCuckoo.chapter02.pojo.Role"/>
		<!-- 使用自動掃描的形式來定義別名，在Role中使用@Alias("role")註解進行說明-->
		<!-- <package name="com.jCuckoo.chapter02.pojo"/> -->
	</typeAliases>
	<environments default="development">
		<environment id="development">
			<transactionManager type="JDBC" />
			<dataSource type="POOLED">
				<property name="driver" value="com.mysql.cj.jdbc.Driver" />
				<property name="url" value="jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT" />
				<property name="username" value="root" />
				<property name="password" value="" />
			</dataSource>
		</environment>
	</environments>
	<mappers>
		<!-- 1.使用檔案路徑引入對映器 -->
		<mapper resource="com\jCuckoo\chapter02\mapper\RoleMapper.xml" />
		<!-- 2.使用包名引入對映器 -->
		<!-- <package name="com.jCuckoo.chapter02.mapper" /> -->
		<!-- 3.使用引入對映器 -->
		<!-- <mapper class="com.jCuckoo.chapter02.mapper.RoleMapper"/> -->
	</mappers>
</configuration> 
 

mybatis_config.xml檔案配置方式二：

<?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>
	<properties>
		<property name="driver" value="com.mysql.cj.jdbc.Driver" />
		<property name="url" value="jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT" />
		<property name="username" value="root" />
		<property name="password" value="" />
	</properties>
	<typeAliases>
		<typeAlias alias="role" type="com.jCuckoo.chapter02.pojo.Role" />
	</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>
	<mappers>
		<mapper resource="com\jCuckoo\chapter02\mapper\RoleMapper.xml" />
	</mappers>
</configuration> 
 

方式一和方式二中的URL被CSDN自動轉換，應該是以下格式：

<property name="url" value="jdbc:mysql://localhost:3306/mybatis?useUnicode=true&amp;characterEncoding=utf8&amp;serverTimezone=GMT" />

mybatis_config.xml檔案配置方式三：

1）jdbc.properties配置資料庫連線資訊

driver=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/mybatis?useUnicode=true&characterEncoding=utf8&serverTimezone=GMT
username=root
password=

<?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>
	<properties resource="jdbc.properties"></properties>
	<typeAliases>
		<typeAlias alias="role" type="com.jCuckoo.chapter02.pojo.Role" />
	</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>
	<mappers>
		<mapper resource="com\jCuckoo\chapter02\mapper\RoleMapper.xml" />
	</mappers>
</configuration>