JSP访问Oracle数据库的实例

SQL> grant connect,resource to user1 identified by pass1;
SQL> conn user1/pass1
SQL> create table test(a number,b char(10));
SQL> insert into test values(1,"一");
SQL> insert into test values(2,"二");
SQL> insert into test values(3,"三");
SQL> commit;
SQL> select * from test;
A B
----------
1 一
2 二
3 三
 

<!--首先导入一些必要的packages-->
<%@ page info="database handler"%>
<%@ page import="java.io.*"%>
<%@ page import="java.util.*"%>
<!--告诉编译器使用SQL包-->
<%@ page import="java.sql.*"%>
<%@ page import="javax.servlet.*"%>
<%@ page import="javax.servlet.http.*"%>
<%
//以try开始
try
{
Connection con;
Statement stmt;
ResultSet rs;
//加载驱动程序，下面的代码为加载JDBD-ODBC驱动程序
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
//用适当的驱动程序连接到数据库，test"是系统dsn名
String url="jdbc:odbc:test";
//建立连接，类似于ASP中的创建数据库联接
con=DriverManager.getConnection(url, "user1", "pass1");
//创建一个JDBC声明
stmt = con.createStatement();
//增加新记录
stmt.executeUpdate("INSERT INTO test (a,b) VALUES (1,"2")");
//查询记录
rs = stmt.executeQuery("SELECT a,b from test");
//输出查询结果
out.println("<table border=1 width=400>");
while (rs.next())
{
String col1 = rs.getString(1);
String col2 = rs.getString(2);
//打印所显示的数据
out.println("<tr><td>"+col1+"</td><td>"+col2+"</td></tr>");
}
out.println("</table>");
}
//如果加载时出错，给出相应的错误信息
catch (Exception e) {}
%>