Question

我是java 8的新手。

我想使用java8并希望将下面的内容转换为java8。

<?php
// require ReCaptcha class
require('autoload.php');

// configure
$from = 'tgdtom@gmail.com';
$sendTo = 'tgdtom@gmail.com';
$subject = 'Bericht via Cates contactformulier';
$fields = array('name' => 'Naam', 'email' => 'Email', 'phone' => 'Tel.nr.', 'message' => 'Bericht'); // array variable name => Text to appear in the email
$okMessage = 'Uw bericht is met succes verzonden, u krijgt zo snel mogelijk reactie!';
$errorMessage = 'Er is iets fout gegaan met het versturen van uw bericht, probeer het later nog eens of neem telefonisch contact op.';
$recaptchaSecret = '6Lf9ZzUUAAAAAL7qstYlXD8pE8LCvpsDWWlvsW5-';

// let's do the sending

try
{
    if (!empty($_POST)) {

        // validate the ReCaptcha, if something is wrong, we throw an Exception, 
        // i.e. code stops executing and goes to catch() block

        if (!isset($_POST['g-recaptcha-response'])) {
            throw new \Exception('ReCaptcha is not set.');
        }

        // do not forget to enter your secret key in the config above 
        // from https://www.google.com/recaptcha/admin

        $recaptcha = new \ReCaptcha\ReCaptcha($recaptchaSecret, new \ReCaptcha\RequestMethod\CurlPost());

        // we validate the ReCaptcha field together with the user's IP address

        $response = $recaptcha->verify($_POST['g-recaptcha-response'], $_SERVER['REMOTE_ADDR']);


        if (!$response->isSuccess()) {
            throw new \Exception('ReCaptcha was not validated.');
        }

        // everything went well, we can compose the message, as usually

        $emailText = "You have new message from contact form\n=============================\n";

        foreach ($_POST as $key => $value) {

            if (isset($fields[$key])) {
                $emailText .= "$fields[$key]: $value\n";
            }
        }


        $headers = array('Content-Type: text/plain; charset="UTF-8";',
            'From: ' . $from,
            'Reply-To: ' . $from,
            'Return-Path: ' . $from,
        );

        mail($sendTo, $subject, $emailText, implode("\n", $headers));

        $responseArray = array('type' => 'success', 'message' => $okMessage);
    }
}
catch (\Exception $e)
{
    $responseArray = array('type' => 'danger', 'message' => $errorMessage);
}

if (!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') {
    $encoded = json_encode($responseArray);

    header('Content-Type: application/json');

    echo $encoded;
}
else {
    echo $responseArray['message'];
}

模型类::

<?php
/* An autoloader for ReCaptcha\Foo classes. This should be required()
 * by the user before attempting to instantiate any of the ReCaptcha
 * classes.
 */
spl_autoload_register(function ($class) {
    if (substr($class, 0, 10) !== 'ReCaptcha\\') {
      /* If the class does not lie under the "ReCaptcha" namespace,
       * then we can exit immediately.
       */
      return;
    }
    /* All of the classes have names like "ReCaptcha\Foo", so we need
     * to replace the backslashes with frontslashes if we want the
     * name to map directly to a location in the filesystem.
     */
    $class = str_replace('\\', '/', $class);
    /* First, check under the current directory. It is important that
     * we look here first, so that we don't waste time searching for
     * test classes in the common case.
     */
    $path = dirname(__FILE__).'/'.$class.'.php';
    if (is_readable($path)) {
        require_once $path;
    }
    /* If we didn't find what we're looking for already, maybe it's
     * a test class?
     */
    $path = dirname(__FILE__).'/../tests/'.$class.'.php';
    if (is_readable($path)) {
        require_once $path;
    }
});

我的问题我如何在上面的列表中应用java 8功能，我想迭代并调用另一个函数。

Answer 1

你可以使用forEach：

listModel.forEach(model -> {
    try {
        new UpDateData().bankData(model.getCust_id(), model.getBank_id(), model.getDate());
    } catch(){
         .... handle
    }
})

Answer 2

forEach在java 8中用于迭代。您可以使用Iterable.forEach（）方法遍历所有元素。

List<String> words = new ArrayList<>(Arrays.asList("the", "this", 
"that", "there"));
alphabets.forEach(s -> { System.out.println(s) }); //using lamda

列表＆lt;＆gt;是迭代类型，因此您可以直接在列表上使用forEach。与旧的外部迭代相比，这称为内部迭代。这由java自动转换为外部迭代。如果只有一个语句是强制性的，则lambda括号在lambda中是可选的。与循环中的旧if块相比，您可以在迭代器上使用过滤器。

alphabets.stream()
     .filter(s -> s.startsWith("the"))
     .forEach(System.out::println);
alphabets.stream()
     .filter(s -> s.length() > 3)
     .forEach(System.out::println);

以上语法使用方法参考来打印元素。

https://docs.oracle.com/javase/tutorial/java/javaOO/methodreferences.html

在java 8中迭代List并在迭代时调用另一个函数

2 个答案: