String getGree = "MID( SUBSTRING_INDEX( daPath, \"/\", -1 ) FROM LOCATE(";
getGree += "\"_\", SUBSTRING_INDEX( daPath, \"/\", -1 )";
getGree += ", POSITION( \"_\" IN SUBSTRING_INDEX( daPath, \"/\",";
getGree += "-1 )) + 1 + 1 ) FOR 4 ) "; 自己动手,丰衣足食..
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