jdbc 分页

连接数据库

public class DbUtil {

    private String driver = "oracle.jdbc.OracleDriver";

    private String url = "jdbc:oracle:thin:@localhost:1521:ORCL";

    private String user = "system";

    private String password = "FengZe2012";

    private Connection conn = null;



    public DbUtil() {

        try {

            Class.forName(this.driver);

            this.conn = DriverManager.getConnection(this.url, this.user, this.password);

        } catch (Exception e) {

            e.printStackTrace();

        }

    }



    public Connection getConn() {

        return this.conn;

    }

}

分页查询

public class PagerDemo {

    public static void main(String[] args) {

        DbUtil du = new DbUtil();

        Connection conn = du.getConn();

        try {

            String sql = "select count(*) from stu";

            PreparedStatement pst1 = conn.prepareStatement(sql);

            ResultSet rs1 = pst1.executeQuery();

            rs1.next();

            int recordcount = rs1.getInt(1); //统计总记录数

            pst1.close();

            

            int pagesize = 3; //指定每页多少条

            //算出总页数

            int pagecount = recordcount%pagesize==0 ? recordcount/pagesize : recordcount/pagesize+1;



            sql = "select * from (select s.*,rownum rn from stu s) where rn between ? and ?";

            PreparedStatement pst2 = conn.prepareStatement(sql);

            

            int p = -6;

            p = p < 1 ? 1 : p;

            p = p >= pagecount ? pagecount : p;

            pst2.setInt(1,p*pagesize-pagesize+1);

            pst2.setInt(2,pagesize*p);

            pst2.execute();

            

            ResultSet rs = pst2.executeQuery();

            SimpleDateFormat sdf = new SimpleDateFormat("yyyy年MM月dd日 hh:mm:ss S");

            while(rs.next()){

                System.out.println(rs.getString("sname")+"    "+sdf.format(rs.getDate("sbirthday")));

            }

            //PreparedStatement pst = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);



            conn.close();

        } catch (SQLException e) {

            e.printStackTrace();

        }

    }



}