java处理列转行

 Map<String, Map<String,String>> map = new HashMap<String,  Map<String,String>>(); while(rs.next()){     if(map.get(rs.getString("TJBH"))==null){          Map<String,String> map2 = new HashMap<String,String>();              map2.put(rs.getString("CCDM"), rs.getString("SBNR"));          map.put(rs.getString("TJBH"), map2);            }else{                map.get(rs.getString("TJBH")).put(rs.getString("CCDM"), rs.getString("SBNR"));                }            } rs.close();