如果要把“<property> name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>”增加到以下代码：<?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.example.demo.mapper.UserMapper"> <resultMap id="userMap" type="com.example.demo.model.User"> <id property="id" column="id" /> <result property="name" column="name" /> <result property="email" column="email" /> </resultMap> <select id="findAll" resultMap="userMap"> SELECT * FROM user </select> <select id="findById" resultMap="userMap"> SELECT * FROM user WHERE id = #{id} </select> <insert id="save"> INSERT INTO user(name, email) VALUES (#{name}, #{email}) </insert> <update id="update"> UPDATE user SET name=#{name}, email=#{email} WHERE id=#{id} </update> <delete id="delete"> DELETE FROM user WHERE id=#{id} </delete> </mapper>当中，应该增加到什么位置？

您可以将 `<property>` 元素添加到 `<mapper>` 元素内的 `<configuration>` 元素内，如下所示：

<?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.example.demo.mapper.UserMapper">
    <resultMap id="userMap" type="com.example.demo.model.User">
        <id property="id" column="id" />
        <result property="name" column="name" />
        <result property="email" column="email" />
    </resultMap>
    <select id="findAll" resultMap="userMap">
        SELECT * FROM user
    </select>
    <select id="findById" resultMap="userMap">
        SELECT * FROM user WHERE id = #{id}
    </select>
    <insert id="save">
        INSERT INTO user(name, email) VALUES (#{name}, #{email})
    </insert>
    <update id="update">
        UPDATE user SET name=#{name}, email=#{email} WHERE id=#{id}
    </update>
    <delete id="delete">
        DELETE FROM user WHERE id=#{id}
    </delete>
    <configuration>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
    </configuration>
</mapper>

请注意，如果您正在使用的是不同的持久化框架而不是 Hibernate，则应将属性名称和属性值替换为相应的值。