jsp连接oracle数据库，主要是通过jdbc技术，首先加载驱动类，然后连接url，输入用户名和密码，打开数据库连接资源，如下代码：
<%@page contentType="text/htmlcharset=gb2312"%><%@page import="java.sql.*"%>
<HTML><BODY>
<hr align="center" width="55%" color="#991111" size="5"/>
<%
Connection conn = null
PreparedStatement stmt = null
ResultSet rs = null
request.setCharacterEncoding("GBK")
try{
Class.forName("oracle.jdbc.driver.OracleDriver")//加载oracle数据库驱动
}
catch(ClassNotFoundException ce){
out.println(ce.getMessage())
}
try{
String url="jdbc:oracle:thin:@localhost:1521:orcl"//连接oracle数据库的url
conn=DriverManager.getConnection(url,"scott","tiger")//开始连接
stmt=conn.prepareStatement("select * from emp")//获取返回的结果集
rs=stmt.executeQuery()
out.print("<TABLE BORDER='1' width='55%' cellpadding='3' align=center>")
out.print("<TR><TD>"+"<b>Empno</b>"+"</TD>")
out.print("<TD>"+"<b>Ename</b>"+"</TD>")
out.print("<TD>"+"<b>Job</b>"+"</TD>")
out.print("<TD>"+"<b>Mgr</b>"+"</TD>")
out.print("<TD>"+"<b>hiredate</b>"+"</TD>")
out.print("<TD align=center>"+"<b>Sal</b>"+"</TD>")
out.print("<TD>"+"<b>Comm</b>"+"</TD>")
out.print("<TD>"+"<b>Deptno</b>"+"</TD></TR>")
while(rs.next()){
out.print("<TR><TD>"+rs.getString(1)+"</TD>")
out.print("<TD>"+rs.getString(2)+"</TD>")
out.print("<TD >"+rs.getString(3)+"</TD>")
out.print("<TD>"+rs.getString(4)+"</TD>")
out.print("<TD>"+rs.getString(5)+"</TD>")
out.print("<TD>"+rs.getString(6)+"</TD>")
out.print("<TD>"+rs.getString(7)+"</TD>")
out.print("<TD>"+rs.getString(8)+"</TD></TR>")
}
out.print("</TABLE>")
rs.close()
stmt.close()
conn.close()
}
catch(Exception e){
System.out.println(e.getMessage())
}
%>
</BODY></HTML>
JSP连接Oracle10g数据库的方法：<%@ page contentType="text/htmlcharset=gb2312"%>
<%@ page import="java.sql.*" %>
<%@ page import="java.io.*" %>
<%@ page import="java.util.*" %>
<html>
<head>
<title>Oracle数据库连接测试</title>
</head>
<body>
<%
java.sql.Connection lConn = null
java.sql.Statement lStat = null
java.sql.ResultSet lRs = null
try
{
DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver())
String lUrl = "java:oracle:thin:@localhost:1521:orcl"
//java:oracle:thin: 表示使用的是thin驱动
//@srv:1521: 表示使用的服务器的名字和端口号
//dbname: 表示数据库的SID
lConn = DriverManager.getConnection(lUrl,"system","rg")
lStat = lConn.createStatement()
//创建表
String createTableCoffees = "CREATE TABLE COFFEES " +
"(COF_NAME VARCHAR(32), SUP_ID INTEGER, PRICE FLOAT, " +
"SALES INTEGER, TOTAL INTEGER)"
lStat.executeUpdate(createTableCoffees)
//插入数据
lStat.executeUpdate("INSERT INTO COFFEES VALUES ('Colombian', 101, 7.99, 0, 0)")
lStat.executeUpdate("INSERT INTO COFFEES VALUES ('Espresso', 150, 9.99, 0, 0)")
lStat.executeUpdate("INSERT INTO COFFEES VALUES ('Colombian_Decaf', 101, 8.99, 0, 0)")
lStat.executeUpdate("INSERT INTO COFFEES VALUES ('French_Roast_Decaf', 49, 9.99, 0, 0)")
//查询结果
lRs = lStat.executeQuery("select * from COFFEES")
//显示结果
out.println("<table>")
while (lRs.next()) {
out.print("<tr><td>" + lRs.getString(1))
//COF_NAME
out.print( "<td>" + lRs.getInt(2))
//SUP_ID
out.print( "<td>" + lRs.getFloat(3))
//PRICE
out.print( "<td>" + lRs.getInt(4))
//SALES
out.println( "<td>" + lRs.getInt(5))
//TOTAL
}
out.println("</table>")
lRs.close()
lStat.close()
} catch (SQLException e) {
throw new ServletException(e)
} finally {
try {
if (lConn != null)
lConn.close()
} catch (SQLException e) {
}
}
%>
</body>
</html>
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