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mybatis学习(3):映射文件的配置和接口创建


mybatis学习(3):映射文件的配置和接口创建_apache

 

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 {

}

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