📄 select3.txt

📁 一本jsp自学教材

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<%@ page contentType="text/html; charset=gb2312" %>
<%@ page language="java" %>
<%@ page import="com.mysql.jdbc.Driver" %>
<%@ page import="java.sql.*" %>
<HTML>
<head>
<title>多表查询</title>
</head>
<BODY>
<%
  //驱动程序名、数据库用户名、密码、数据库名、表名
  String driverName="com.mysql.jdbc.Driver";
  String username="root";
  String password="yesterdayn";
  String dbName="study";
  //连接字符串 
  String url="jdbc:mysql://localhost/"+dbName+"?characterEncoding=GBK";
try{
  //加载驱动程序
  Class.forName("com.mysql.jdbc.Driver");
  //建立同数据库的连接对象
  Connection connection=DriverManager.getConnection(url,username,password);
  Statement statement = connection.createStatement();  
  //发送执行SQL语句
  String sql="SELECT ordering.name,product.* FROM ordering,product WHERE ordering.pdm=product.pdm";
  ResultSet rs = statement.executeQuery(sql); 
  out.print("多表查询成功！<BR>");  
  out.print("<TABLE BORDER=1 bordercolorlight=#000000 >");
  out.print("<TR><TD width=40>序号</TD>");
  out.print("<TD width=60>客户</TD>");
  out.print("<TD width=80>商品名称</TD>");
  out.print("<TD width=60>品牌</TD>");
  out.print("<TD width=80>价格/元</TD></TR>");
  int i=1;
  while(rs.next())
    {
     out.print("<TR>");
     out.print("<TD>"+i+"</TD>");
     out.print("<TD>"+rs.getString("ordering.name")+"</TD>");
     out.print("<TD>"+rs.getString("product.pname")+"</TD>");     
     out.print("<TD>"+rs.getString("provider")+"</TD>"); 
     out.print("<TD>"+rs.getString("price")+"</TD>");
     out.print("</TR>");
   }
  out.print("</TABLE>"); 
  rs.close();   
  statement.close();   
  connection.close();
 }
catch(SQLException e)
  {
   out.print(e.toString()); 
  }  
%>  
</HTML>
</BODY>

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