```xml <?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> <typeAliases> <typeAlias type="com.gosuncn.entity.User" alias="user"/> </typeAliases> </configuration> ``` ```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.gosuncn.dao.UserMapper"> <select id="findUserById" parameterType="java.lang.Integer" resultType="user"> select id, name, age, address from user where id = #{id} </select> </mapper> ``` 只要配置了别名就不区分大小写。