ibatis3 关联查询， coumn添加多列条件

<resultMap type="themeFormatBean" id="themeFormatMap">
		<id column="THFORMAT_ID" property="thFormatId"  />
		<result column="THTYPE_TH_ID" property="thId"  />
		<result column="THTYPE_HEIGHT" property="thHeight"  />
		<result column="THTYPE_WIDTH" property="thWidth"  />
		<result column="TH_BG_ID" property="thBgId"  />
		<result column="THTYPE_RSPACE" property="thRSpace"  />
		<result column="THTYPE_CSPACE" property="thCSpace"  />
		<result column="THTYPE_TXT_HEIGHT" property="thTxtHeight"  javaType="int" jdbcType="INTEGER" />
		<result column="THTYPE_TXT_WIDTH" property="thTxtWidth"  javaType="int" jdbcType="INTEGER"/>
		<result column="THTYPE_TXT_X" property="thTxtX"  />
		<result column="THTYPE_TXT_Y" property="thTxtY"  />
		
<!--		<result column="TH_URL" property="thUrl"  />-->
		
		
		<result column="TH_FONTID" property="thFontId"  />
		<result column="TH_FONTSIZE" property="thFontSize"  />
		<result column="TH_FONTCOLOR" property="thFontColor"  />
		<result column="TH_ISDEFAULT" property="thIsDefault"/>
		<association property="thUrl" column="{themeIndex=TH_BG_ID,width=THTYPE_WIDTH,height=THTYPE_HEIGHT}" 
		 select="getUrlByBgId"></association>
	</resultMap>

<select id="getUrlByBgId" parameterType="com.contentlib.beans.bussiness.ThemeByIndex" resultType="String">
  SELECT MATERIAL_URL FROM ctt_material_standard  WHERE MATERIAL_ID = #{themeIndex} 
   and MATERIAL_WIDTH=#{width} and MATERIAL_HEIGHT=#{height}
 </select>

 <association property="thUrl" column="{themeIndex=TH_BG_ID,width=THTYPE_WIDTH,height=THTYPE_HEIGHT}"
select="getUrlByBgId"></association>
colum 通过{}添加多列条件查询

在select语句中解析传入sql语句，在网上找了一下，自己摸索了一下，发现居然可以这样子用。。。

java类：

public class ThemeByIndex {
	private String themeIndex;
	private int width;
	private int height;
	public String getThemeIndex() {
		return themeIndex;
	}
	public void setThemeIndex(String themeIndex) {
		this.themeIndex = themeIndex;
	}
	public int getWidth() {
		return width;
	}
	public void setWidth(int width) {
		this.width = width;
	}
	public int getHeight() {
		return height;
	}
	public void setHeight(int height) {
		this.height = height;
	}
	

}