jdbc的简单实现demo

直接上代码吧，只是因为上篇的心血来潮。总结哈

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;public class OracleTest {
     public static void main(String[] args) {
     ResultSet rs = null;
      Statement stmt = null;
      Connection conn = null;
      try {
       Class.forName("oracle.jdbc.driver.OracleDriver");
       conn = DriverManager.getConnection("jdbc:oracle:thin:@192.254.13.13:1521:orclTest", "123456", "123456");
       stmt = conn.createStatement();
       rs = stmt.executeQuery("select * from t_service");
       while(rs.next()) {
        System.out.println(rs.getString(1));
       }
      } catch (ClassNotFoundException e) {
       e.printStackTrace();
      } catch (SQLException e) {
       e.printStackTrace();
      } finally {
       try {
        if(rs != null) {
         rs.close();
         rs = null;
        }
        if(stmt != null) {
         stmt.close();
         stmt = null;
        }
        if(conn != null) {
         conn.close();
         conn = null;
        }
       } catch (SQLException e) {
        e.printStackTrace();
       }
      }
     }
}

　　差不多就这样吧