JDBC（与Oracle的连接）

JDBC编程步骤：
----java与Oracle数据的连接（lomboz_eclipse环境下）
  1.在Oracle数据库安装文件夹中找到jdbc文件夹→lib文件夹→classesl2.jar
  2.lomboz_eclipse中导入此Jar包
    导入方法：
           建立一个项目，在项目名称上右键鼠标选择Build Path→Add External Archives→
           选择classesl2.jar进行导入

  3.新建一程序编写与Oracle连接的代码
    步骤如下：
            1.实例话驱动类
          class.forName("Oracle.jdbc.driver.OracleDriver");
            2.建立到数据库的连接
          Connection conn = DriverManager.getConnection("jdbc:oracle:thin:
                            @192.168.8.1:1521:yuewei","scott","tiger");
            3.将数据发送到数据库中
          Statement stm = conn.CreatStatement();
            4.执行语句（select语句）
          ResultSet rs = stm.executeQuery(select * from dept);
            5.显示语句
          rs.getString("deptno");

完整代码如下：
import java.sql.*; public class TestJDBC { public static void main(String[] args) { ResultSet rs = null; Statement stmt = null; Connection conn = null; try { Class.forName("oracle.jdbc.driver.OracleDriver"); //new oracle.jdbc.driver.OracleDriver(); conn = DriverManager.getConnection("jdbc:oracle:thin:@192.168.0.1:1521:yuewei", "scott", "tiger"); stmt = conn.createStatement(); rs = stmt.executeQuery("select * from dept"); while(rs.next()) { System.out.println(rs.getString("deptno")); //System.out.println(rs.getInt("deptno")); } } 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(); } } } }