mybatis学习(3)：映射文件的配置和接口创建

 

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 {
 
}