Xml中使用foreach遍历对象实现代码

<select id="selectProductMSTList" resultType="java.util.Map" parameterType="map">
  SELECT
     <foreach collection="fields" item="field" index="index" close="" separator=",">
      #{field.tablekoumokuNames,jdbcType=VARCHAR}
    </foreach>  
  FROM
    ${temp}.m_product
  LEFT JOIN ${temp}.m_type_cd ON ${temp}.m_product.product_group_cd = ${temp}.m_type_cd.type_cd
  WHERE
    ${temp}.m_product.anken_id = #{ankenId,jdbcType=VARCHAR} AND
    ${temp}.m_product.subsidiary_cd = #{subsidiaryCd,jdbcType=VARCHAR} AND
    ${temp}.m_product.sub_anken_id = #{subAnkenId,jdbcType=VARCHAR}
  ORDER BY
    ${temp}.m_product.subsidiary_cd ASC,
    ${temp}.m_product.brand_cd ASC,
    ${temp}.m_product.product_cd ASC
</select>

Map<String,Object> xx=new HashMap<String, Object>();
xx.put("22","ABC");

paramMap.put("maps",xx);

<foreach collection="maps" item="field" index="key" separator=",">
       ${field}={key}
    </foreach>