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