public Customer getCustomerById(int id) { // 根据 id 获取客户信息的具体实现 // ... return customer; }补全代码
时间: 2024-02-29 21:55:26 浏览: 18
public Customer getCustomerById(int id) {
// 根据 id 获取客户信息的具体实现
Connection conn = null;
PreparedStatement stmt = null;
ResultSet rs = null;
Customer customer = null;
try {
conn = getConnection(); // 获取数据库连接
String sql = "SELECT * FROM customers WHERE id = ?";
stmt = conn.prepareStatement(sql);
stmt.setInt(1, id);
rs = stmt.executeQuery();
if (rs.next()) {
customer = new Customer();
customer.setId(rs.getInt("id"));
customer.setName(rs.getString("name"));
customer.setAddress(rs.getString("address"));
// 其他属性同理
}
} catch (SQLException e) {
e.printStackTrace();
} finally {
// 关闭资源
close(conn, stmt, rs);
}
return customer;
}
// 获取数据库连接
private Connection getConnection() throws SQLException {
// ...
}
// 关闭资源
private void close(Connection conn, Statement stmt, ResultSet rs) {
// ...
}