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));
                }
            }

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();
            }
        }
    }