网上说可以使用Reader reader = rs.getCharacterStream(1); 获得Long型数据，但是我直接使用ds.getString()来获取并未报错，而且数据库也是9i的，这地方不清楚，还有待研究，先写上
修改Long数据：使用
PreparedStatement pstam = null;
pstam.setCharacterStream(n, new StringReader(value),value.length);
例如：
public boolean editNewsById(String row_id,HashMap map) {
boolean bool = false;
int count = 0;
Connection conn = BDUtil.getConnection();
PreparedStatement pstam = null;
StringBuffer sql = new StringBuffer();
sql.append("update cd_news set news_name= ,describute_news= ,summary_news= where row_id= ");
try {
pstam = conn.prepareStatement(sql.toString());
pstam.setString(1, map.get("title_news").toString());
pstam.setCharacterStream(2, new StringReader(map.get("describute_news").toString()),map.get("describute_news").toString().length());
pstam.setString(3,map.get("summary_news").toString());
pstam.setString(4, row_id);
count = pstam.executeUpdate();
} catch (SQLException e) {
e.printStackTrace();
}finally{
BDUtil.close(conn, pstam, null);
}
if(count>0) {
bool = true;
}
return bool;
}
向数据库中增加Long信息时也是用
pstam.setCharacterStream(n, new StringReader(value),value.length); 同上