java连接Oracle数据库

第一步：导入驱动包，这个包在Oracle安装目录下可以找到，例如：E:Oracleproduct12.2.0dbhome_1jdbclib；

第二步就是写代码了

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

public class DBUtil {
    private static String username="c##scott";
    private static String password="tiger";
    private static String diver="oracle.jdbc.OracleDriver";
    private static String url="jdbc:oracle:thin:@127.0.0.1:1521:orcl";//如果是服务器则这儿应该改成ip:1521:xe
    
    public static Connection getConnection() {
        Connection connection=null;
        try {
            Class.forName(diver);
            connection=DriverManager.getConnection(url, username, password);
            
        } catch (ClassNotFoundException e) {
            // TODO Auto-generated catch block
            throw new RuntimeException("class not find!", e);
        } catch (SQLException e2) {
            // TODO Auto-generated catch block
            throw new RuntimeException("get connection error!", e2);
        }
        return connection;
        
    }
    
}

public class test {
    public static void main(String []args){
        Connection connection=DBUtil.getConnection();
        String sql="select * from student";
        PreparedStatement preparedStatement=null;
        ResultSet resultSet=null;
        System.out.println("OK");
        try {
            preparedStatement=connection.prepareStatement(sql);
            resultSet=preparedStatement.executeQuery();
            while(resultSet.next()){
                String id=resultSet.getString("id");
                String name=resultSet.getString("name");
                System.out.println(id+"	"+name);
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
}

这样就OK了