Mybatis环境搭建

依赖

<dependencies>
    <dependency>
          <groupId>org.mybatis</groupId>
          <artifactId>mybatis</artifactId>
          <version>3.4.5</version>
      </dependency>
      <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>5.1.16</version>
      </dependency>
      <dependency>
          <groupId>log4j</groupId>
          <artifactId>log4j</artifactId>
          <version>1.2.12</version>
      </dependency>
      <dependency>
          <groupId>junit</groupId>
          <artifactId>junit</artifactId>
          <version>4.10</version>
      </dependency>
  </dependencies>

resources 中的配置

SqlMapConfig.xml (可以取别的名字) 根配置

<?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">
 
 <!-- 主配置 -->
 <configuration>
    <!-- 将数据库配置移到外面去
        <properties resource="jdbcConfig.properties" />
        要用的时候需要"${value}来使用
     -->
    <!-- 配置别名,不需要写类全名 -->
    <typeAliases>
        <package name="com.mybatis.domain"/>
    </typeAliases>
        <!-- 开启缓存 -->
    <settings>
        <setting name="cacheEnabled" value="true"/>
    </settings>
    
     <!-- 配置环境 -->
    <environments default="mysql">
        <!-- 配置mysql  -->
        <environment id="mysql">
            <!-- 配置事务类型 -->
            <transactionManager type="JDBC"></transactionManager>
            <!-- 配置连接池 -->
            <dataSource type="POOLED">
                <!-- 连接数据库的基本信息 -->
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/eesy_mybatis"/>
                <property name="username" value="root"/>
                <property name="password" value="tujiawei"/>
            </dataSource>
        </environment>
    </environments>
    <!-- 映射配置文件 -->
    <mappers>
        <package name="com.mybatis.dao"/>
    </mappers>
 </configuration>

log4j.properties

# Set root category priority to INFO and its only appender to CONSOLE.
#log4j.rootCategory=INFO, CONSOLE            debug   info   warn error fatal
log4j.rootCategory=debug, CONSOLE, LOGFILE

# Set the enterprise logger category to FATAL and its only appender to CONSOLE.
log4j.logger.org.apache.axis.enterprise=FATAL, CONSOLE

# CONSOLE is set to be a ConsoleAppender using a PatternLayout.
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

# LOGFILE is set to be a File appender using a PatternLayout.
log4j.appender.LOGFILE=org.apache.log4j.FileAppender
log4j.appender.LOGFILE.File=d:\axis.log
log4j.appender.LOGFILE.Append=true
log4j.appender.LOGFILE.layout=org.apache.log4j.PatternLayout
log4j.appender.LOGFILE.layout.ConversionPattern=%d{ISO8601} %-6r [%15.15t] %-5p %30.30c %x - %m\n

domain中写实体类
dao中写接口
resources中写sql映射

// 测试
        SqlSession session;
    InputStream in;
    IUserDao userDao;
    @Before
    public void init() throws IOException {
        in = Resources.getResourceAsStream("SqlMapConfig.xml");
        SqlSessionFactory factory= new SqlSessionFactoryBuilder().build(in);
        session = factory.openSession(true);
        userDao = session.getMapper(IUserDao.class);
    }
    @After
    public void close() throws IOException {
        in.close();
        session.close();
    }

来源：https://www.cnblogs.com/tujw/p/12313188.html