Java中使用JDBC连接oracle数据库

/**
* 驱动加载字符串
*/
private String className = "oracle.jdbc.driver.OracleDriver";
/**
* 数据库连接地址
*/
private String url="jdbc:oracle:thin:@localhost:1521:orcl";
/**
* 登录名
*/
private String user = "system";
/**
* 密码
*/
private String password="orcl";
/**
* 数据库连接对象
*/
protected Connection connection;
/**
* sql语句执行命令对象
*/
protected PreparedStatement preparedStatement;
/**
* 结果集对象
*/
protected ResultSet resultSet;
/**
* 获得数库连接
* @return 数据库连接对象
*/
protected Connection openConnection(){
try {
//加载驱动
Class.forName(className);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//获得数据库连接
try {
this.connection = DriverManager.getConnection(url, user, password);
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return this.connection;
}
protected void closeConnection(){
if(this.resultSet!=null){
try {
//关闭结果集
this.resultSet.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(this.preparedStatement!=null){
//关闭sql执行对象
try {
this.preparedStatement.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if(this.connection!=null){
//关闭连接
try {
this.connection.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
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