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Java中如何对Oracle的Long型数据操作

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2016-06-07 16:59:371587browse

在Oracle中是Long型,在Java中如何进行获取,插入和修改:网上说可以使用Reader reader = rs.getCharacterStream(1); 获得Long型

在Oracle中是Long型,在Java中如何进行获取,,插入和修改:

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

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