Question

我正在使用Spring MVC。在控制器内部，我从模型中获取列表对象并将此列表传递给视图。我将循环索引传递给javascript函数。但是现在我想通过javascript中的索引获取每个对象的值。我该怎么做？这是我的控制器类：

    @RequestMapping(method = RequestMethod.GET)
    public Model handleRequest(HttpServletRequest request,
    HttpServletResponse response,
    @RequestParam(required = false, value = "q") String query) throws Exception {

        Model model = new ExtendedModelMap();
        String orderItem = request.getParameter("order_item");
        List<Long> itemsIdList = new ArrayList<Long>();
        List<OrderRequest> orderRequestList =               getItemToppingCount(orderItem,itemsIdList);
        model.addAttribute("itemsSelected", orderRequestList);

        return model;
    }

这是我的JSP：

    <script>
    function remove_confirm_order(index){
        alert(index); // OK
        // Get value of first object in list
        var str1 = '${itemsSelected[0].name}';
        // When adding this line, I can't show anything from JSP
        var str2 = '${itemsSelected['+index+'].name}';
        alert(str1);
    }
    </script>
    <c:forEach var="item" items="${itemsSelected}" varStatus="loop">
    <a href="#" onclick="remove_confirm_order('${loop.index}');" />
    </c:forEach>

Answer 1

您可以在下面的代码段中获得相同的内容：

$str = 'Bellevue,Bergouey |Bergouey,Bourdious';
$str = preg_replace('~(\w+)\s*\|(\1)~', '$2', $str);
echo $str; //=> "Bellevue,Bergouey,Bourdious"

最好是从<script> function remove_confirm_order(index, item){ alert(index); // OK alert(item); //OrderRequest var orderRequest = item; // Now extract value from item(instance of OrderRequest), example, orderRequest.getValue(index); // Get value of first object in list var str1 = '${itemsSelected[0].name}'; // When adding this line, I can't show anything from JSP var str2 = '${itemsSelected['+index+'].name}'; alert(str1); } </script> <c:forEach var="item" items="${itemsSelected}" varStatus="loop"> <a href="#" onclick="remove_confirm_order('${loop.index}', ${item});" /> </c:forEach>对控制器进行AJAX调用，获取回复并做任何你想做的事情。

JavaScript

Answer 2

你可以这样做。

＆＃13;

$urls = array(
  'example.com/?foo=bar',
  'example.com/?bar=foo&foo=bar',
  'example.com/?foo=bar&bar=foo',
);

echo 'Original' . PHP_EOL;
foreach ($urls as $url) {
  echo $url . PHP_EOL;
}

echo PHP_EOL . '@AaronHathaway' . PHP_EOL;
foreach ($urls as $url) {
  echo preg_replace('#&?foo=[^&]*#', null, $url) . PHP_EOL;
}

echo PHP_EOL . '@SergeS' . PHP_EOL;
foreach ($urls as $url) {
  echo preg_replace( "/&{2,}/", "&", preg_replace( "/foo=[^&]+/", "", $url)) . PHP_EOL;
}

echo PHP_EOL . '@Justin' . PHP_EOL;
foreach ($urls as $url) {
  echo preg_replace('/([?&])foo=[^&]+(&|$)/', '$1', $url) . PHP_EOL;
}

echo PHP_EOL . '@kraftb' . PHP_EOL;
foreach ($urls as $url) {
  echo preg_replace('/(&|\?)foo=[^&]*&/', '$1', preg_replace('/(&|\?)foo=[^&]*$/', '', $url)) . PHP_EOL;
}

echo PHP_EOL . 'My version' . PHP_EOL;
foreach ($urls as $url) {
  echo str_replace('/&', '/?', preg_replace('#[&?]foo=[^&]*#', null, $url)) . PHP_EOL;
}

＆＃13;

您在javascript中创建一个数组。然后在脚本标记中使用jsp标记，可以将数据填充到数组中。记得在顶部

进行jstl声明

如何从javascript中的spring mvc控制器上的列表中获取每个元素

2 个答案: