jdbc连接数据库代码

try {
//1、加载驱动
Class.forName("oracle.jdbc.OracleDriver");
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//2、创建连接
Connection conn = null;
try {
conn = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl", "scott", "tiger");
//jdbc:mysql://localhost:3306/myProject
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

PreparedStatement pstmt = null;
List<ExitFinanceBean> list1 = new ArrayList<ExitFinanceBean>();
try {
String sql = "";
pstmt = conn.prepareStatement(sql);
ResultSet rs = pstmt.executeQuery();
while(rs.next()){
ExitFinanceBean bean = new ExitFinanceBean();
bean.setE_id(rs.getInt("e_id"));
bean.setName(rs.getString("e_name"));

list1.add(bean);
}

} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} finally{
try {
if(pstmt!=null||conn!=null){
pstmt.close();
conn.close();
}

} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}