java连接oracle数据库

连接oracle数据库代码：

package common;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;


/*
 * 用于oracle数据库用户登录验证

*输入参数oracle用户名、密码

*输出参数返回连接对象

 */
public class OperateOracle {
public boolean flag=false;


public Connection getConnection(String username,String password){  
Connection conn=null;  
try {  
Class.forName("oracle.jdbc.driver.OracleDriver");//找到oracle驱动器所在的类  
String url="jdbc:oracle:thin:@localhost:1521:stud"; //URL地址  
conn=DriverManager.getConnection(url, username, password);  
flag=true;

} catch (ClassNotFoundException e) {  
System.out.println("登陆失败");
} catch (SQLException e) {  
System.out.println("登陆失败");
}  
return conn;  
}  
}

//查询用户是否存在
public boolean loginfindcunzai(String accout) {
boolean flage=false;

创建连接对象
Connection con=oo.getConnection("scoll1", "123456");
ResultSet rs = null; 
java.sql.Statement sql; 

try {
sql=con.createStatement(); 
rs=sql.executeQuery("SELECT * FROM ora_user");
while(rs.next()){ 
String accont0=rs.getString(1);
if(accont0.equals(accout)) {
flage=true;
}
}
con.close();
}catch (SQLException e) {
flage=true;
e.printStackTrace();
System.out.println("查询失败");
} 
return flage;
}