for (int t = 0; t < memberLen; t++) {
 memTemp = stafferMap.get(strMember[t]);
 if(memTemp != null){
 memberNames += memTemp + ",";
 }
}

memberNames = memberNames.substring(0,memberNames.length()-1);

Team1 = " ' " + Team1.Substring(0, Team1.Length - 2);

StringBuilder sdb = new StringBuilder();
for ( int t = 0; t < memberLen; t++ )
{
 memTemp = stafferMap.get( strMember[t] );
 if ( memTemp != null )
 {
  if ( sbd.length > 0 )
  {
   sbd.append( "," ).append( memTemp );
  }else{
   sbd.append( memTemp );
  }
 }
}
System.out.prentln( "没有多余逗号：" + sbd.toString() );