oracle数据库建立链接

package db;

import java.sql.Connection;
import java.sql.Driver;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Properties;
import java.util.Vector;

public class OracleConn
{

private final static String JDBC_DRIVER = "oracle.jdbc.driver.OracleDriver";
protected static Connection dbConnection = null;
public static boolean openConnection() throws SQLException
{
boolean bSucceed = false;

String strURL = "jdbc:oracle:thin:@10.40.111.20:1521:uep" ;
StringBuffer sbInfo = new StringBuffer(200);
sbInfo.append("openConnection():strDriver=oracle.jdbc.driver.OracleDriver;jdbcUrl=jdbc:oracle:thin:@10.40.111.20:1521:uep;dbuser=system;password=password");
Statement stmt = null;
ResultSet rs = null;
try
{
DriverManager.registerDriver((Driver) Class.forName(JDBC_DRIVER).newInstance());
}
catch(Exception ex)
{
ex.printStackTrace();
}

try
{
//加此调试是为了诊断代码是否停在下面的getConnection那里了。
//dMsg.info("- 0 Try to connect: "+dbInfo.getDBMSKey());
Properties prop = new Properties();
prop.put("user", "system");
prop.put("password", "netnumen");

Driver driver = DriverManager.getDriver(strURL);
DriverManager.setLoginTimeout(60);
dbConnection = driver.connect(strURL, prop);
//使用下面代码容易产生阻塞
//dbConnection = DriverManager.getConnection(strURL,
// this.dbInfo.getUser(),
// this.dbInfo.getPassword());
stmt = dbConnection.createStatement();
rs = stmt.executeQuery("select * from caffm.caf_alarm");

while(rs.next())
{
// Vector vecTablespaceInfo = new Vector(5);
System.out.println("haha");
}
bSucceed = true;
}
catch(SQLException sqlEx)
{
if(dbConnection!=null)
{
dbConnection.close();
}
sqlEx.printStackTrace();
bSucceed = false;
throw sqlEx;
}
catch(Exception ignore)
{
if(dbConnection!=null)
{
dbConnection.close();
}
ignore.printStackTrace();
bSucceed = false;

}
//dMsg.info("- 1 End to connect: "+dbInfo.getDBMSKey());
return bSucceed;
}

public static void main(String[] args)
{
try
{
openConnection();
}
catch(SQLException e)
{

e.printStackTrace();
}
System.out.println("ok");
}

}