Oracle数据库链接（二）

这个项目中使用的oracle数据库链接是通过实现了一个ConnDBa类来简化oracleJDBC的操作

ConnDBa.java

package
one;

import
java.sql.Connection;

import
java.sql.DriverManager;

import
java.sql.ResultSet;

import
java.sql.SQLException;

import
java.sql.Statement;

public
class
ConnDB {

static
Connection conn = null
;

static
Statement sm = null
;

static
ResultSet rs = null
;

public
static
Connection getConn() {

try
{

Class.forName("oracle.jdbc.driver.OracleDriver"
);

conn = DriverManager.getConnection(

"jdbc:oracle:thin:@localhost:1521:orcl"
, "scott"
, "hello"
);

} catch
(ClassNotFoundException e) {

e.printStackTrace();

} catch
(SQLException e) {

e.printStackTrace();

}

return
conn;

}

public
static
void
close() {

try
{

if
(rs != null
) {

rs.close();

}

if
(sm != null
) {

sm.close();

}

if
(conn != null
) {

conn.close();

}

} catch
(SQLException e) {

e.printStackTrace();

}

}

}

在另一个类中使用这个辅助类
OracleDB.java
package
one;

import
java.sql.Connection;

import
java.sql.ResultSet;

import
java.sql.SQLException;

import
java.sql.Statement;

class
OracleDB {

public
static
void
main(String[] args) {

Connection conn = null
;

Statement sm = null
;

ResultSet rs = null
;

try
{

conn = ConnDB.getConn();

sm = conn.createStatement();

rs = sm.executeQuery("select * from dept"
);

while
(rs.next()) {

System.out.println("deptno=="
+ rs.getInt(1));

System.out.println("dname=="
+ rs.getString(2));

System.out.println("loc=="
+ rs.getString(3));

}

} catch
(SQLException e) {

e.printStackTrace();

} finally
{

ConnDB.close();

}

}

}