DBCP连接池的最简单应用(用于Oracle数据库)
内容导读
互联网集市收集整理的这篇技术教程文章主要介绍了DBCP连接池的最简单应用(用于Oracle数据库),小编现在分享给大家,供广大互联网技能从业者学习和参考。文章包含5307字,纯文字阅读大概需要8分钟。
内容图文
![DBCP连接池的最简单应用(用于Oracle数据库)](/upload/InfoBanner/zyjiaocheng/549/8cfc6a4d7487466e8acc6e56b1e33bf0.jpg)
sean-m700是主机名,ora92是oracle数据库的instance ID. 我手头的机器上没有安装oracle数据库,用的是很早以前的一个oracle9.2的
鉴于有人问起DBCP直接用于JDBC连接的问题,我做了一个最简单的示例。所有资源来源于网上。它不需要什么Web容器,就是一简单的控制台应用。
资源:
当然,还有Oracle jdbc要用的ojdbc14.jar (适用于oracle9i及以上版本)
工程文件:放到这里了。
数据库连接信息:
jdbc:oracle:thin:scott/tiger@sean-m700:1521:ora92
sean-m700是主机名,ora92是oracle数据库的instance ID. 我手头的机器上没有安装oracle数据库,用的是很早以前的一个oracle9.2的拷贝,重新安装实例和相应服务得来的。
源码如下:借化献佛,,源码也是从网上得来的。(?revision=1100136&view=markup)
/*
//
33 // Here's a simple example of how to use the BasicDataSource.
34 //
35
36 //
37 // Note that this example is very similiar to the PoolingDriver
38 // example.
39
40 //
41 // To compile this example, you'll want:
42 // * commons-pool-1.5.6.jar
43 // * commons-dbcp-1.3.jar (JDK 1.4-1.5) or commons-dbcp-1.4 (JDK 1.6+)
44 // * j2ee.jar (for the javax.sql classes)
45 // in your classpath.
46 //
47 // To run this example, you'll want:
48 // * commons-pool-1.5.6.jar
49 // * commons-dbcp-1.3.jar (JDK 1.4-1.5) or commons-dbcp-1.4 (JDK 1.6+)
50 // * j2ee.jar (for the javax.sql classes)
51 // * the classes for your (underlying) JDBC driver
52 // in your classpath.
53 //
54 // Invoke the class using two arguments:
55 // * the connect string for your underlying JDBC driver
56 // * the query you'd like to execute
57 // You'll also want to ensure your underlying JDBC driver
58 // is registered. You can use the "jdbc.drivers"
59 // property to do this.
60 //
61 // For example:
62 // java -Djdbc.drivers=oracle.jdbc.driver.OracleDriver \
63 // -classpath commons-pool-1.5.6.jar:commons-dbcp-1.4.jar:j2ee.jar:oracle-jdbc.jar:. \
64 // PoolingDataSourceExample
65 // "jdbc:oracle:thin:scott/tiger@myhost:1521:mysid"
66 // "SELECT * FROM DUAL"
*/
/*
The Oracle connection URL for the thin client-side driver ojdbc14.jar has the following format:
jdbc:oracle:thin:[user/password]@[host][:port]:SID
jdbc:oracle:thin:[user/password]@//[host][:port]/SID
user - The login user name defined in the Oracle server.
password - The password for the login user.
host - The host name where Oracle server is running.
Default is 127.0.0.1 - the IP address of localhost.
port - The port number where Oracle is listening for connection.
Default is 1521.
SID - System ID of the Oracle server database instance.
SID is a required value. By default, Oracle Database 10g Express
Edition creates one database instance called XE.
*/
import org.apache.commons.dbcp.BasicDataSource;
import javax.sql.*;
import java.sql.*;
public class TestDataSource
{
/**
* @param args
*/
public static void main(String[] args)
{
System.out.println("Setting up data source.");
String url = "jdbc:oracle:thin:scott/tiger@sean-m700:1521:ora92";
DataSource dataSource = setupDataSource(url);
System.out.println("Done...");
// Now, we can use JDBC DataSource as we normally would.
//
Connection conn = null;
Statement stmt = null;
ResultSet rset = null;
try {
System.out.println("Creating connection.");
conn = dataSource.getConnection();
System.out.println("Creating statement.");
stmt = conn.createStatement();
System.out.println("Executing statement.");
rset = stmt.executeQuery("select 1 from DUAL");
System.out.println("Results:");
int numcols = rset.getMetaData().getColumnCount();
while(rset.next()) {
for(int i=1;i<=numcols;i++) {
System.out.print("\t" + rset.getString(i));
}
System.out.println("");
}
} catch(SQLException e) {
e.printStackTrace();
} finally {
try { if (rset != null) rset.close(); } catch(Exception e) { }
try { if (stmt != null) stmt.close(); } catch(Exception e) { }
try { if (conn != null) conn.close(); } catch(Exception e) { }
}
}
public static DataSource setupDataSource(String connectURI) {
BasicDataSource ds = new BasicDataSource();
ds.setDriverClassName("oracle.jdbc.driver.OracleDriver");
ds.setUsername("scott");
ds.setPassword("tiger");
ds.setUrl(connectURI);
return ds;
}
public static void printDataSourceStats(DataSource ds) {
BasicDataSource bds = (BasicDataSource) ds;
System.out.println("NumActive: " + bds.getNumActive());
System.out.println("NumIdle: " + bds.getNumIdle());
}
public static void shutdownDataSource(DataSource ds) throws SQLException {
BasicDataSource bds = (BasicDataSource) ds;
bds.close();
}
}
内容总结
以上是互联网集市为您收集整理的DBCP连接池的最简单应用(用于Oracle数据库)全部内容,希望文章能够帮你解决DBCP连接池的最简单应用(用于Oracle数据库)所遇到的程序开发问题。 如果觉得互联网集市技术教程内容还不错,欢迎将互联网集市网站推荐给程序员好友。
内容备注
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 gblab@vip.qq.com 举报,一经查实,本站将立刻删除。
内容手机端
扫描二维码推送至手机访问。