log4j.properties 配置

#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/hang/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

Mybatis-config.xml配置

<?xml version="1.0" encoding="UTF8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">

<configuration>
    <!--引入外部配置文件-->
    <properties resource="db.properties"/>

    <!--日志配置-->
    <settings>
<!--        <setting name="logImpl" value="STDOUT_LOGGING"/>-->
        <setting name="logImpl" value="LOG4J"/>
    </settings>
    <!--可以给实体类起别名-->
<typeAliases>
    <package name="com.hang.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Mybatis核心配置文件中注册！-->
    <mappers>
            <mapper resource="com/hang/mapper/UserMapper.xml"/>
<!--        <mapper class="com.hang.mapper.UserMapper"/>-->
<!--        <package name="com.hang.mapper"/>-->
    </mappers>
</configuration>

Mapper配置

<?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="com.hang.mapper.UserMapper">
    <!--结果集映射-->
    <resultMap id="UserMap" type="User">
        <!--column数据库中的字段，property是实体类中的属性-->
<!--        <result column="id" property="id"/>-->
<!--        <result column="name" property="name"/>-->
        <result column="pwd" property="password"/>
    </resultMap>
    <select id="getUserByID" resultMap="UserMap">
        select * from mybatis.user where id = #{id}
    </select>
</mapper>