mybatis 根据Map字段对应值更新

Mapper.xml

  <update id="updateFields">    update tablename    <set>      <foreach collection="fields.entrySet()" index="key" item="value" separator=",">        <if test="key != 'id'.toString()">          ${key} = #{value}        </if>      </foreach>    </set>    WHERE    id = #{id}  </update>

dao操作

<pre name="code" class="java">    public void updateFields(Map<String, Object> fieldMap, String id, String sqlName) {        Map<String, Object> params = Maps.newHashMap();        params.put("fields", fieldMap);        params.put("id", id);        this.getSqlSession().update(sqlName, params);    }

fieldMap里 key是字段名  value 字段值在·