Orcal的JDBC数据连接方式

 package cn.com.db;

 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.util.Properties;

 public class DBUtil {

     //获得连接方法
     public Connection getConn() {
         Connection conn = null;
         try {

             Class.forName("oracle.jdbc.driver.OracleDriver");
             conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","scott","tiger");
         } catch (ClassNotFoundException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }catch (SQLException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }

         return conn;
     }

     //释放资源
     public void free(ResultSet rs,PreparedStatement pstm,Connection conn) {
         if(rs != null) {
             try {
                 rs.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         if(pstm != null) {
             try {
                 pstm.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         if(conn != null) {
             try {
                 conn.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
     }

     public void free(PreparedStatement pstm,Connection conn) {
         if(pstm != null) {
             try {
                 pstm.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         if(conn != null) {
             try {
                 conn.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
     }
 }