java连接数据库oracle

步骤：

1、先找到classes12.jar文件，该文件在你安装oracle目录下，可以去找，要是不知道放哪，可以通过搜索该文件找到文件所在的目录

2、在一个Eclipse里创建一个java项目，在该项目属性界面，点击Java Build Path ->Libraries->点击Add External JARs 添加你刚刚搜索到的classes12.jar文件

3、编写代码如下：

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.SQLException;

public class db {

private String url = "jdbc:oracle:thin:@10.10.21.48:1521:ORCL";

private String usename = "SCOTT";

private String pw = "password";

private Connection conn = null;

public Connection Conn1()

{

try {

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

try {

conn = DriverManager.getConnection(url,usename,pw);

} catch (SQLException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

} catch (ClassNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

return conn;



}

public static void main(String[] args) {

// TODO Auto-generated method stub

db obj = new db();

Connection con = obj.Conn1();

if(con == null)

System.out.print("连接失败");

else

System.out.print("连接成功");

}

}