jsp怎么连接数据库oracle_sql

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>

写第一个连接Oracle的JSP程序test.jsp

1、连入SQL*Plus

以system/manager用户登录，

SQL>conn system/manager

创建新的用户：如user1/pass1，赋予connect,resource权限。

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

2、配置ODBC（在服务器端设置）

开始－＞设置－＞控制面板－＞管理工具－＞数据源 (ODBC)－＞系统DSN－＞添加－＞

选择“Oracle ODBC Driver”－＞完成－＞

Data Source Name：test名字随便取，好记就行，如：test

Service Name：oradb Oracle数据库的实例名，本例：oradb，一般Oracle默认安装为ORCL

UserID：user1 Oracle用户名，本例：user1

按“OK”－＞按“确定”退出

3、在C:\JBuilder4\tomcat\webapps\test下创建test.jsp，用notebook编辑，输入以下代码

<%@ page info="database handler"%>

<%@ page import="java.io.*"%>

<%@ page import="java.util.*"%>

<%@ 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) {}

4、打开一个浏览器窗口，输入以下地址来查看运行结果

http://localhost:8080/test/test.jsp

<%@page contentType="text/htmlcharset=gb2312"%>

<%@page import="java.sql.*"%>

Connection conn = null

PreparedStatement stmt = null

ResultSet rs = null

request.setCharacterEncoding("GBK")

try{

Class.forName("oracle.jdbc.driver.OracleDriver")

}

catch(ClassNotFoundException ce){

out.println(ce.getMessage())

}

try{

String url="jdbc:oracle:thin:@localhost:1521:orcl"

conn=DriverManager.getConnection(url,"scott","tiger")

stmt=conn.prepareStatement("select * from emp")

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>

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原文地址: https://outofmemory.cn/sjk/9375736.html

jsp怎么连接数据库oracle

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