mybatis 核心配置文件

mybatis 核心配置文件的 mybatis-config.xml文件的详细解析

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configuration
        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration> <!--根元素标签-->
   <!-- <properties resource="database.properties"/>-->
    <!--当propeties的name属性一致的时候,resources文件中的优先级会更高-->
    <properties resource="database.properties">
        <!--<property name="jdbc.driver" value="com.mysql.jdbc.Driver"/>
        <property name="jdbc.url" value="jdbc:mysql://127.0.0.1:3306/smbms"/>
        <property name="jdbc.user" value="root"/>
        <property name="jdbc.password" value="123456"/>-->
    </properties>
    <settings>
        <setting name="logImpl" value="LOG4J"/>
        <setting name="lazyLoadingEnabled" value="false"/>
        <!--partial 部分的-FULL NONE(手动映射 resultMap)-->
        <setting name="autoMappingBehavior" value="PARTIAL"/>
    </settings>
    <typeAliases>
       <!-- <typeAlias type="com.mybatis.pojo.User" alias="u"></typeAlias>-->
        <package name="com.mybatis.pojo"/>
    </typeAliases>
  
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driver}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.user}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
        <environment id="test">
            <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>


    <mappers>
        <!--<mapper resource="com/mybatis/dao/UserMapper.xml"></mapper>-->
        <!--<mapper class="com.mybatis.dao.UserMapper"></mapper>-->
       <!--全局唯一资源定位 uniform resource locator http://127.0.0.1:8080/Servlet-->
       <!-- <mapper url="file:///D:/IdeaProjects/mybatis/mybatisdemo01/src/main/resources/com/mybatis/dao/UserMapper.xml"></mapper>-->
        <package name="com.mybatis.dao" ></package>
    </mappers>
</configuration>

database.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://127.0.0.1:3306/smbms?useUnicode=true&characterEncoding=UTF-8
jdbc.user=root
jdbc.password=123456

mapper.xml中

<!--可复用的sql语句片段-->
    <sql id="query">
        select * from smbms_user
    </sql>
    
    
        <select id="findAllUser" resultType="com.mybatis.pojo.User">
      /*  select * from smbms_user;*/
      <include refid="query"/>
    </select>
   

 <settings>
        <setting name="logImpl" value="LOG4J"/>
        <setting name="lazyLoadingEnabled" value="false"/>
        <!--partial 部分的-FULL NONE(手动映射 resultMap)-->
        <setting name="autoMappingBehavior" value="PARTIAL"/>
    </settings>