配置文件

db.properties

jdbc.driver=com.oracle.jdbc.OracleDriver
jdbc.url=jdbc:oracle:thin:@127.0.0.1:1521:wiicare
jdbc.username=wiicare
jdbc.password=Mdsd123

log4j.properties

### 设置###
log4j.rootLogger = ERROR,stdout### è¾åºä¿¡æ¯å°æ§å¶æ¬ ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n
log4j.category.org.springframework.beans.factory=ERROR

mybatis-config.xml

<?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"><configutation><!-- 引入数据库配置 --><properties resource="db.properties"></properties><!-- 定义别名 --><typeAliases><typeAlias type="com.geyao.mybatis.pojo.Blog" alias="Blog"></typeAlias></typeAliases><!-- 定义数据源 --><environments default=""><environment id="development"><dataSource type="POOLED"><property name="driver" value="${jdbc.driver}"></property><property name="url" value="${jdbc.url}"></property><property name="username" value="${jdbc.username}"></property><property name="password" value="${jdbc.password}"></property></dataSource></environment></environments><mappers><package name="com.geyao.mabatis.mapper"></package></mappers></configutation>

BlogMapper.xml

<?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="com.geyao.mybatis.mapper.BlogMapper"><!-- statement --><select id="selectBlog" parameterType="int" resultType="Blog">select * from Blog where id=#{id}</select></mapper>

BlogMapper类

package com.geyao.mybatis.mapper;import com.geyao.mybatis.pojo.Blog;public interface BlogMapper {Blog selectBlog(Integer id);}

Blog类

package com.geyao.mybatis.pojo;public class Blog {}