Question

我正在做一个电话簿，我想将联系人保存到vcard。我在互联网上找到vcard格式，但是我不知道如何从stdin中读取数据。

package homework;

import java.io.*;

public class SaveToVcard {

    public static void vcard() throws IOException {
        File file = new File("contact.vcf");
        FileOutputStream fop = new FileOutputStream(file);

        if (file.exists()) {
            String vcard = "BEGIN:VCARD\n" + "VERSION:4.0\n" + "N:Gump;Forrest;;;\n" + "FN:Forrest Gump\n"
                    + "ORG:Bubba Gump Shrimp Co.\n" + "TITLE:Shrimp Man\n"
                    + "TEL;TYPE=work,voice;VALUE=uri:tel:+1-111-555-1212\n"
                    + "TEL;TYPE=home,voice;VALUE=uri:tel:+1-404-555-1212\n" + "EMAIL:forrestgump@example.com\n"
                    + "REV:20080424T195243Z\n" + "END:VCARD";
            fop.write(vcard.getBytes());

            BufferedReader br = null;
            String currentLine;
            br = new BufferedReader(new FileReader("contact.vcf"));
            while ((currentLine = br.readLine()) != null) {
                System.out.println(currentLine);
            }

            fop.flush();
            fop.close();
            System.out.println("Kész");
        } else
            System.out.println("A fájl nem létezik");

    }

Answer 1

您可以使用Scanner并执行类似的操作

<div class="card">
        <h5 class="card-header">My Cart</h5>
            <div class="card-body">

                <?php
                    if(isset($_SESSION['shopping_cart']) && count($_SESSION['shopping_cart']) > 0)
                    {
                        $entertainment = $_SESSION['shopping_cart'];

                        echo '
                                <table class="table table-hover table-bordered">
                                <thead>
                                    <tr>
                                    <th scope="col">#</th>
                                    <th scope="col">Title</th>
                                    <th scope="col">Quantity</th>
                                    <th scope="col">Price</th>
                                    <th scope="col" width="100">Action</th>
                                    </tr>
                                </thead>';

                        $item_number = 1;
                        $total = 0;
                        foreach ($entertainment as $product) {
                        echo '
                                <tbody>
                                    <tr>
                                    <th scope="row">'. $item_number .'</th>
                                    <td>' . $product['title'] . '</td>
                                    <td>'.$product['quantity'].'</td>
                                    <td>$ '. $product['offer_price_corporate_artist']. '</td>
                                    <td>
                                        <a href="cart.php?id_to_remove=' . $item_number . '" class="btn btn-danger btn-sm">X</a>
                                    </td>
                                    </tr>
                                </tbody>
                           ';
                           $total += ($product['offer_price_corporate_artist'] * $product['quantity']);
                            $item_number++;
                        }

                        echo '
                                <tr>
                                    <th colspan="4" align="right">
                                        Total:
                                    </th>
                                    <td>
                                        $ '. $total .'
                                    </td>
                                </tr>
                                </table>';

                    }
                    else {
                        echo '<div class="alert alert-primary" role="alert">
                              Shopping cart is empty, visit <a href="index.php" class="alert-link">products</a> page to add product into shopping cart.
                            </div>';
                    }
                ?>

请参见[basic.compound]/4.3

或者也许可以在运行应用程序时将所需的内容作为参数传递

请参见https://docs.oracle.com/javase/8/docs/api/java/util/Scanner.html

如何在Java中使用自己的数据创建vcard？

1 个答案: