学习笔记——mybatis的sql拼接与log4j调试

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="Book">
<resultMap type="com.lijie.bean.Book" id="BookResult">
<id column="ID" jdbcType="INTEGER" property="id"/>
<result column="NAME" jdbcType="VARCHAR" property="name"/>
</resultMap>
<select id="queryBookList" parameterType="com.lijie.bean.Book" resultMap="BookResult">
select id,name from book
<where>
<if test="id !=null">
and ID=#{id}
</if>

</where>
</select>
</mapper>

log4j.rootLogger=DEBUG,Console
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.layout=org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n
log4j.logger.org.apache=INFO