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循環(huán)查詢 以及PreparedStatement

 昵稱1052583 2010-04-21

<%--
    Document   : test3
    Created on : 2010-4-21, 15:49:23
    Author     : Administrator
--%>
<%@page import="rec.DBUtil,java.sql.*"%>
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
 "http://www./TR/html4/loose.dtd">

<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>JSP Page</title>
    </head>
    <body>
        <%
    DBUtil db = new DBUtil();
    Connection conn = db.getConn();
    String sql = "select top 5 * from qk";
//out.print(conn);
    Statement stmt = conn.createStatement();
    ResultSet rs = stmt.executeQuery(sql);
    
    Connection conn2 = db.getConn();
     Statement stmt2 = conn2.createStatement();
    while (rs.next()) {
     int id = rs.getInt(1);
     out.print(id);
     out.print(rs.getString(2));
     String sql2 = "select * from test2 where id=" + id;
     
     ResultSet rs2 = stmt2.executeQuery(sql2);
     out.print("<br>" + sql2 + "<br>");
     while (rs2.next()) {
      out.print(rs2.getString("infor"));
     }
     out.print("<br>------------<br>");
     rs2.close();
    }
     stmt2.close();
     conn2.close();
    conn.close();
//out.print(rs.next());
   /* String sql = "select * from qk where id =?";
    PreparedStatement pst = conn.prepareStatement(sql);
    pst.setInt(1, 7257);
    ResultSet rs = pst.executeQuery();
    if (rs.next()) {
    int id = rs.getInt(1);
    out.print(id);
    out.print(rs.getString(2));
    String sql2 = "select * from test2 where id=" + id;
    Connection conn2 = db.getConn();
    Statement stmt2 = conn2.createStatement();
    ResultSet rs2 = stmt2.executeQuery(sql2);
    out.print("<br>"+sql2+"<br>");
    while (rs2.next()) {
    out.print(rs2.getString("infor"));
    }
    rs2.close();
    stmt2.close();
    conn2.close();
    conn.close();

    }
     * */
  %>
  <br>
  over!
    </body>
</html>

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