使用Ajax技术从本地取回xml文件信息

来源：互联网发布：java绘制动态仪表盘编辑：程序博客网时间：2024/05/22 14:14

//1. 编写note.xml
<note>
<to>Mr.Dylan</to>
<body>Don't forget the meeting!</body>
</note>
2.编写getxml.html
[html] view plain copy
1. <html>
2. <head>
3. <script type="text/javascript">
4. var xmlhttp;
5. function loadXMLDoc(url)
6. {
7. xmlhttp=null;
8. if (window.XMLHttpRequest)
9. {// code for IE7, Firefox, Opera, etc.
10. xmlhttp=new XMLHttpRequest();
11. }
12. else if (window.ActiveXObject)
13. {// code for IE6, IE5
14. xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");
15. }
16. if (xmlhttp!=null)
17. {
18. xmlhttp.onreadystatechange=state_Change;
19. xmlhttp.open("GET",url,true);
20. xmlhttp.send(null);
21. }
22. else
23. {
24. alert("Your browser does not support XMLHTTP.");
25. }
26. }
28. function state_Change()
29. {
30. if (xmlhttp.readyState==4)
31. {// 4 = "loaded"
32. <span style="color:#FF0000;">if (xmlhttp.status==200 || xmlhttp.status==0)</span>
33. {// 200 = "OK"
34. document.getElementById('A1').innerHTML=xmlhttp.status;
35. document.getElementById('A2').innerHTML=xmlhttp.statusText;
36. document.getElementById('A3').innerHTML=xmlhttp.responseText;
37. }
38. if(xmlhttp.status==404)
39. {
40. alert("Page not found!");
41. }
42. else
43. {
44. alert("Problem retrieving XML data:" + xmlhttp.statusText);
45. }
46. }
47. }
48. </script>
49. </head>
51. <body>
52. <h2>Using the HttpRequest Object</h2>
54. <p><b>Status:</b>
55. <span id="A1"></span>
56. </p>
58. <p><b>Status text:</b>
59. <span id="A2"></span>
60. </p>
62. <p><b>Response:</b>
63. <br /><span id="A3"></span>
64. </p>
66. <button onclick="loadXMLDoc('note.xml')">Get XML</button>
68. </body>
69. </html>
注：红色部分，由于获取的是本地的XML所以此处浏览器返回的xmlhttp.status=0.
```
也就是说没有通过Web服务器形式的Ajax请求返回值都是0;
```
3. 使用火狐打开getxml.html:

-------------------------
present by dylan.

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