Oracle数据库和Java的连接 需要添加Oracle自带的驱动\product\11.2.0\dbhome_1\jdbc\lib\jdbc6_g.jar文件

package DB;

import java.sql.Connection;

import java.sql.DriverManager;

import java.sql.ResultSet;

import java.sql.SQLException;

import java.sql.Statement;

public class OracleTest {

/**
* @param args
* @throws ClassNotFoundException 
*/
public static void main(String[] args) {
String url="jdbc:oracle:thin:@localhost:1521:ORCL";
try {
Class.forName("oracle.jdbc.driver.OracleDriver");
Connection conn=DriverManager.getConnection(url, "scott", "admin");
Statement stmt=conn.createStatement();
String strsql="select USERNAME,PASSWORD from USERTABLE";
ResultSet rs=stmt.executeQuery(strsql);
while(rs.next())
{
System.out.println("用户名："+rs.getString(1));
System.out.println("密码："+rs.getString(2));
}
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}

}

}