mybatis-xml-configuration.md

Back to Home

The Overview of MyBatis XML Configuration

1. Data Source Configuration: You can specify the details of your database connection, such as driver class, connection URL, username, and password.

   <configuration>
     <environments default="development">
       <environment id="development">
         <dataSource type="POOLED">
           <property name="driver" value="com.mysql.jdbc.Driver"/>
           <property name="url" value="jdbc:mysql://localhost:3306/mydatabase"/>
           <property name="username" value="root"/>
           <property name="password" value="password"/>
         </dataSource>
       </environment>
     </environments>
   </configuration>

2. Mappers Configuration: You define the mappings between your SQL statements and Java methods in mapper XML files. You can specify the location of these files in the MyBatis configuration.

   <mappers>
       <mapper resource="com/example/mapper/EmployeeMapper.xml"/>
       <mapper resource="com/example/mapper/DepartmentMapper.xml"/>
   </mappers>

3. Type Aliases: You can define aliases for your Java classes to simplify mapping and querying.

   <typeAliases>
     <typeAlias alias="Employee" type="com.example.model.Employee"/>
     <typeAlias alias="Department" type="com.example.model.Department"/>
   </typeAliases>

4. Plugins: MyBatis provides a plugin mechanism to intercept and modify the behavior of its components. You can configure plugins in the XML file.

   <plugins>
     <plugin interceptor="com.example.plugins.MyCustomPlugin">
       <property name="property1" value="value1"/>
       <property name="property2" value="value2"/>
     </plugin>
   </plugins>

5. Global Settings: You can configure various global settings such as logging, cache behavior, and lazy loading.

   <settings>
     <setting name="logImpl" value="SLF4J"/>
     <setting name="cacheEnabled" value="true"/>
     <setting name="lazyLoadingEnabled" value="true"/>
   </settings>