Question

我尝试使用javascript使用ajax从xml文件中打印书名，价格和日期。我花了差不多两天的时间在youtube上看了一些视频来弄明白我不能。我不知道我在哪里做错了如果你可以帮我解决你的问题。谢谢你。

＆＃13;

$(document).ready(function() {
    $("#find").click(function() {
      var book = $("#book").val();
      var xhttp = new XMLHttpRequest();
      xhttp.onreadystatechange = function() {
        if (xhttp.status == 200) {
          document.getElementById('forPrice').innerHTML = 'Test1';
          var i;
          var xmlDoc = xhttp.responseXML;
          var x = xmlDoc.getElementsByTagName("book");
          for (i = 0; i < x.length; i++) {
            catalog + = xmlDoc[i].getElementsByTagName("price")[0].childNodes[0].nodeValue);
          document.getElementsById("#forPrice").innerHTML(catalog);
          xmlDoc[i].getElementsByTagName("title")[0].childNodes[0].nodeValue);
        document.getElementsById("#forBookInformation").innerHTML(catalog);
        xmlDoc[i].getElementsByTagName("data")[0].childNodes[0].nodeValue);
      document.getElementsById("#forPublishDate").innerHTML(catalog);

    });
  }
};
xhttp.open("POST", "books.xml", true);
xhttp.send();

})
})

＆＃13;

<?xml version="1.0"?>
<catalog>
   <book>
      <author>Gambardella, Matthew</author>
      <title>XML Developer's Guide</title>
      <price>44.95</price>
      <date>2000-10-01</date>
      <description>An in-depth look at creating applications 
      with XML.</description>
   </book>
   <book>
      <author>Ralls, Kim</author>
      <title>Midnight Rain</title>
      <price>5.95</price>
      <date>2000-12-16</date>
      <description>A former architect battles corporate zombies, 
      an evil sorceress, and her own childhood to become queen 
      of the world.</description>
   </book>
   <book>
      <author>Corets, Eva</author>
      <title>Oberon's Legacy</title>
      <price>5.95</price>
      <date>2001-03-10</date>
      <description>In post-apocalypse England, the mysterious 
      agent known only as Oberon helps to create a new life 
      for the inhabitants of London. Sequel to Maeve 
      Ascendant.</description>
   </book>
   <book>
      <author>Thurman, Paula</author>
      <title>Splish Splash</title>
      <price>4.95</price>
      <date>2000-11-02</date>
      <description>A deep sea diver finds true love twenty 
      thousand leagues beneath the sea.</description>
   </book>
   <book>
      <author>Knorr, Stefan</author>
      <title>Creepy Crawlies</title>
      <price>4.95</price>
      <date>2002-10-01</date>
      <description>An anthology of horror stories about roaches,
      centipedes, scorpions  and other insects.</description>
   </book>
</catalog>

＆＃13;

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="utf-8">
  <title>Books</title>
  <style type="text/css">
    table,
    td {
      border: 1px solid black;
    }
  </style>
  <script src="jquery-1.11.2.js"></script>

  <script src="p3.js"></script>
</head>

<body>
  <h1>Books</h1>

  <h2>Book Price</h2>
  <form action="" method="post">
    <select name="book" id="book">
      <option value="XML Developer's Guide">XML Developer's Guide</option>
      <option value="Midnight Rain">Midnight Rain</option>
      <option value="Oberon's Legacy">Oberon's Legacy</option>
      <option value="Splish Splash">Splish Splash</option>
      <option value="Creepy Crawlies">Creepy Crawlies</option>
    </select>
    Select a book to see the price
    <br>
    <br>
    <input type="button" id="find" value="Find!">
  </form>
  <div id="forPrice"></div>

  <h2>Author Names and Book Titles</h2>
  <div id="forBookInformation"></div>

  <h2>Book Publish Date</h2> 
  <div id="forPublishDate"></div>



  <body>

</html>

＆＃13;

使用javascript的ajax。我花了差不多两天的时间在youtube上看了一些视频来弄明白我不能。我不知道我在哪里做错了如果你可以帮我解决你的问题。谢谢你。

Answer 1

您的代码有很多问题。让我解释一下在哪里：

我改变了＃34; POST＆＃34;到＆＃34; GET＆＃34; xhttp.open("GET", "books.xml", true);
document.getElementsById错误，因为只有一个ID，它应该是：document.getElementById
您使用jQuery语法是$('#forPrice')但是由于您使用原生JS，因此您必须省略#，即document.getElementById('forPrice') - ＆gt;请注意缺少#
因为你使用原生JS（而不是jQuery），innerHTML是一个属性，你需要使用它（即不是.innerHTML('text')而是.innerHTML = 'text'）
只使用一个变量来连接它只会将文本添加到一个值..所以我从catalog更改为特定值（如果您愿意，可以还原此更改）。
有很多)是不允许的。

总而言之，我改变的内容并不完全正确，但至少数据已加载。但是，由于您不检查从select-option元素中选择的内容，因此数据将被覆盖。

希望这有助于您朝着正确的方向前进！

这是指向工作示例的链接。 http://plnkr.co/edit/4TrjfX4LI8234lFVwIyU?p=info

Answer 2

我假设你非常了解ajax。

module Rustgem
  system("cd #{File.dirname(__FILE__)}/../rust && cargo build --release")
end

  var data = "<?xml version='1.0'?> <catalog> <book> <author>Gambardella, Matthew</author> <title>XML Developer's Guide</title> <price>44.95</price> <date>2000-10-01</date> <description>An in-depth look at creating applications with XML.</description> </book> <book> <author>Ralls, Kim</author> <title>Midnight Rain</title> <price>5.95</price> <date>2000-12-16</date> <description>A former architect battles corporate zombies, an evil sorceress, and her own childhood to become queen of the world.</description> </book> <book> <author>Corets, Eva</author> <title>Oberon's Legacy</title> <price>5.95</price> <date>2001-03-10</date> <description>In post-apocalypse England, the mysterious agent known only as Oberon helps to create a new life for the inhabitants of London. Sequel to Maeve Ascendant.</description> </book> <book> <author>Thurman, Paula</author> <title>Splish Splash</title> <price>4.95</price> <date>2000-11-02</date> <description>A deep sea diver finds true love twenty thousand leagues beneath the sea.</description> </book> <book> <author>Knorr, Stefan</author> <title>Creepy Crawlies</title> <price>4.95</price> <date>2002-10-01</date> <description>An anthology of horror stories about roaches, centipedes, scorpions and other insects.</description> </book> </catalog>";

$(document).ready(function() {
  var getBookByTitle = function(title){
        var bookElement = undefined;
        var xmlDoc = $.parseXML( data ),
        xml = $(xmlDoc),
        catalog = xml.find( "catalog" );
        $.each(catalog.find('book'), function(i, book){
          if($(book).find("title").text() == title){
            bookElement = {};
            bookElement.author = $(book).find("author").text();
            bookElement.title = $(book).find("title").text();
            bookElement.price = $(book).find("price").text();
            bookElement.date = $(book).find("date").text();
          }
          
        });

        return bookElement;
      };

    $("#find").click(function() {
      var searchBook = $("#book").val();
      var bookElement = getBookByTitle(searchBook);
      $("#forPrice").text(bookElement.price);
      $("#forBookInformation").html("<i>"+ bookElement.author +","+bookElement.title +"</i>");
      $("#forPublishDate").text(bookElement.date);
    });
  
});

使用javascript

2 个答案: