如何用java连接oracle数据库

发布网友 发布时间：2022-04-20 11:16

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懂视网 时间：2022-04-07 21:10

import java.sql.Connection; 2 import java.sql.DriverManager; 3 import java.sql.PreparedStatement; 4 import java.sql.ResultSet; 5 import java.sql.SQLException; 6 7 /** 8 * oracle数据库驱动类 封装 9 * @author Administrator 10 * 11 */ 12 public class Oracle { 13 14 final String Driver="oracle.jdbc.driver.OracleDriver"; //oracle驱动
　　　 15 final String url="jdbc:oracle:thin:@localhost:1521:orcl"; //1521：端口 orcl:数据库名 16 final String username="News"; //oracle数据库用户名 17 final String password="197520"; //oracle数据库密码 18 19 /* 20 * 封装连接 21 */ 22 public Connection getConnection(){ 23 Connection cn=null; //声明驱动 24 25 try { 26 27 Class.forName(Driver);//加载驱动 28 29 cn=DriverManager.getConnection(url,username,password);//建立连接 30 31 } catch (ClassNotFoundException e) { 32 // TODO Auto-generated catch block 33 e.printStackTrace(); 34 } catch (SQLException e) { 35 // TODO Auto-generated catch block 36 e.printStackTrace(); 37 } 38 return cn; 39 } 40 41 /* 42 * 关闭结果集，操作，连接 43 */ 44 45 public void Close(ResultSet rs,PreparedStatement ps,Connection cn){ 46 try{ 47 //判定是否为空值 48 if(rs!=null){ 49 rs.close(); 50 } 51 if(ps!=null){ 52 ps.close(); 53 } 54 if(cn!=null){ 55 cn.close(); 56 } 57 }catch(SQLException e){ 58 e.printStackTrace(); 59 } 60 } 61 62 }

 

Java连接Oracle数据库

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热心网友 时间：2022-04-07 18:18

public class OracleJdbcTest
{
String driverClass = "oracle.jdbc.driver.OracleDriver";

Connection con;

public void init(FileInputStream fs) throws Exception
{
Properties props = new Properties();
props.load(fs);
String url = props.getProperty("db.url");
String userName = props.getProperty("db.user");
String password = props.getProperty("db.password");
Class.forName(driverClass);

con=DriverManager.getConnection(url, userName, password);
}

public void fetch() throws SQLException, IOException
{
PreparedStatement ps = con.prepareStatement("select SYSDATE from al");
ResultSet rs = ps.executeQuery();

while (rs.next())
{
// do the thing you do
}
rs.close();
ps.close();
}

public static void main(String[] args)
{
OracleJdbcTest test = new OracleJdbcTest();
test.init();
test.fetch();
}
}

[代码] db.properties
db.url = jdbc:oracle:thin:@::
db.user = sa
db.password =