常用jdbc操作

Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver");
   Connection con = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;Databasename=epet","sa","sa");
   String sql= "insert into title(Id,TitleName,FilePath,Creator) values(?,?,?,?,)";
   PreparedStatement pStatement = con.prepareStatement(sql);
   pStatement.setInt(1, value);
   pStatement.setString(2, value);
   pStatement.setString(3, value);
   pStatement.setString(4, value);
   int row = pStatement.executeUpdate();//增删改
   ResultSet rs = pStatement.executeQuery();//查询

 

ResultSetMetaData用法：

Map<String, String> mm = new HashMap<String, String>();

Connection conn = ConnectionManager.getInstance().getConnction();

             //查出列名和注释

            String sql = "select  a.column_name,a.comments  from  user_col_comments  a where table_name='CS_GZRY_JXXX'";

            PreparedStatement pst = conn.prepareStatement(sql);

            ResultSet rs = pst.executeQuery();

            ResultSetMetaData data=rs.getMetaData();

            int numberOfColumns = data.getColumnCount();

            //将列名和对应的注释封装到map中

            for(int i=1;i<=numberOfColumns;i++){

                while(rs.next()){

                    System.out.println(rs.getString(i) + "  "+rs.getObject(i+1));

                    mm.put(rs.getString(i), rs.getString(i+1));

                }

            }

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批处理多条不同的sql：

public static  void distributeRole(BigDecimal userid,BigDecimal roleid){

        Connection con = null;

        Statement statement = null;

        ResultSet res = null;

        String sql = "";

        String sql2 = "";

        try {

            sql ="insert into db_user(userid) values (" + userid + ")";

            sql2 = "insert into db_user_role values(" + userid + "," + roleid +")";

            con = DriverManager.getConnection("","sa","");

            //Connection con = DB.getInstance().getConnection();

            if(con != null){

                System.out.println("连接成功");

            }else{

                System.out.println("连接失败");

            }

             con.setAutoCommit(false);

             statement = con.createStatement();

             statement.addBatch(sql);

             statement.addBatch(sql2);

             int[] re =  statement.executeBatch();



             if(re[0] == 1 && re[1] == 1){

                 System.out.println("分配角色成功");

             }else{

                 System.out.println("分配角色失败");

             }

             con.commit(); 

             con.setAutoCommit(true);

        } catch (SQLException e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

            try {

                con.rollback();

            } catch (SQLException e1) {

                // TODO Auto-generated catch block

                e1.printStackTrace();

            }

        }finally{

            try {

                statement.close();

                con.close();

            } catch (SQLException e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

        }

    }

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