如何在MyBatis中进行复杂的If条件调整

<select id="selectUsers" resultType="User">
  SELECT * FROM users
  <where>
    <choose>
      <when test="name != null and age != null">
        AND name = #{name} AND age = #{age}
      </when>
      <when test="name != null">
        AND name = #{name}
      </when>
      <when test="age != null">
        AND age = #{age}
      </when>
      <otherwise>
        AND 1=1
      </otherwise>
    </choose>
  </where>
</select>

<select id="selectUsers" resultType="User">
  SELECT * FROM users
  <where>
    <if test="name != null">
      AND name = #{name}
    </if>
    <if test="age != null">
      AND age = #{age}
    </if>
  </where>
</select>

<select id="selectUsers" resultType="User">
  SELECT * FROM users
  <where>
    <trim prefix="AND" prefixOverrides="AND">
      <if test="name != null">
        AND name = #{name}
      </if>
      <if test="age != null">
        AND age = #{age}
      </if>
    </trim>
  </where>
</select>