<insert id="updateOrInsertPhone2Email" useGeneratedKeys="true" keyProperty="id" parameterType="com.sa.pojo.Phone2Email" >
    <!-- 查看是否存在memberid,如果存在及更新，否则插入 -->
    <selectKey keyProperty="count" order="BEFORE" resultType="int">
      select count(*) as count from phone2email where phone = #{phone,jdbcType=VARCHAR}
    </selectKey>

    <!-- 如果大于0则更新 -->
    <if test="count>0">
      update phone2email set email=#{email,jdbcType=VARCHAR} where phone = #{phone,jdbcType=VARCHAR}
    </if>

    <!-- 如果等于0则保存 -->
    <if test="count==0">
      insert into phone2email(phone,email)
      values(#{phone,jdbcType=VARCHAR},#{email,jdbcType=VARCHAR})
    </if>

  </insert>

这里的count要有setter方法，也就是要作为Phone2Email（对象）的属性：

@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@ToString
public class Phone2Email {
    private Integer id;

    private String phone;

    private String email;

    private int count;


 }

如果没有则会报错：

Caused by: org.apache.ibatis.executor.ExecutorException: No setter found for the keyProperty 'count' in com.sa.pojo.Phone2Email.