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JSP get方法中参数解码问题

发布于 2024-10-03 07:53:22 字数 3604 浏览 3 评论 0原文

这里jsp页面是如何调用的。

eventMap.jsp?venue=%C4%B0ndigo

这是 eventMap.jsp 中我获得场地参数的行：

var venue="<%= URLDecoder.decode(request.getParameter("venue"),"UTF-8") %>";

不幸的是，这是最终 javascript 的结果：

var venue="Ä°ndigo";

How can I use encodingproperly in jsp page in order to getcoded value正确（engido）。

编辑： 整个 eventMap.jsp

<!DOCTYPE html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import = "java.net.URLDecoder"%>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Event on Map></title>
<link href="http://code.google.com/apis/maps/documentation/javascript/examples/default.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript" charset="UTF-8">
  function initialize() {
    <% request.setCharacterEncoding("UTF-8"); %> 
    var lat=<%= request.getParameter("lat") %>;
    var lng=<%= request.getParameter("lng") %>;
    var venue="<%= URLDecoder.decode(request.getParameter("venue"),"UTF-8") %>";

    var myLatlng = new google.maps.LatLng(lat,lng);
    var myOptions = {
      zoom: 15,
      center: myLatlng,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    }
    var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

    var marker = new google.maps.Marker({
        position: myLatlng, 
        map: map,
        title:"Hello"
    });   

    var infowindow = new google.maps.InfoWindow({ content: venue, size: new google.maps.Size(50,50)});
        google.maps.event.addListener(marker, 'click', function() {
        infowindow.open(map,marker);
    });

  }
</script>
</head>
<body onload="initialize()">
  <div id="map_canvas"></div>
</body>

</html>

Firebug 结果：

<!DOCTYPE html>
2
3
4<html>
5<head>
6<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
7<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
8<title>Event on Map</title>
9<link href="http://code.google.com/apis/maps/documentation/javascript/examples/default.css" rel="stylesheet" type="text/css" />
10<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
11<script type="text/javascript" charset="UTF-8">
12 function initialize() {
13 var lat=41.062786;
14 var lng=28.981934;
15 var venue="Ä°Tà Kültür Sanat BirliÄi (KSB) Binası Küçük Salon (Maslak)";
16
17 var myLatlng = new google.maps.LatLng(lat,lng);
18 var myOptions = {
19 zoom: 15,
20 center: myLatlng,
21 mapTypeId: google.maps.MapTypeId.ROADMAP
22 }
23 var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
24
25 var marker = new google.maps.Marker({
26 position: myLatlng,
27 map: map,
28 title:"Hello"
29 });
30
31 var infowindow = new google.maps.InfoWindow({ content: venue, size: new google.maps.Size(50,50)});
32 google.maps.event.addListener(marker, 'click', function() {
33 infowindow.open(map,marker);
34 });
35
36 }
37</script>
38</head>
39<body onload="initialize()">
40 <div id="map_canvas"></div>
41</body>
42
43</html>
原文

Here how jsp page is called.

eventMap.jsp?venue=%C4%B0ndigo

This is the line in eventMap.jsp which I get venue parameter:

var venue="<%= URLDecoder.decode(request.getParameter("venue"),"UTF-8") %>";

Unfortunately this is the result in final javascript:

var venue="Ä°ndigo";

How can I use encoding properly in jsp page in order to get decoded value correctly (İngido).

Edit:
Whole eventMap.jsp

<!DOCTYPE html>
<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ page import = "java.net.URLDecoder"%>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Event on Map></title>
<link href="http://code.google.com/apis/maps/documentation/javascript/examples/default.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript" charset="UTF-8">
  function initialize() {
    <% request.setCharacterEncoding("UTF-8"); %> 
    var lat=<%= request.getParameter("lat") %>;
    var lng=<%= request.getParameter("lng") %>;
    var venue="<%= URLDecoder.decode(request.getParameter("venue"),"UTF-8") %>";

    var myLatlng = new google.maps.LatLng(lat,lng);
    var myOptions = {
      zoom: 15,
      center: myLatlng,
      mapTypeId: google.maps.MapTypeId.ROADMAP
    }
    var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);

    var marker = new google.maps.Marker({
        position: myLatlng, 
        map: map,
        title:"Hello"
    });   

    var infowindow = new google.maps.InfoWindow({ content: venue, size: new google.maps.Size(50,50)});
        google.maps.event.addListener(marker, 'click', function() {
        infowindow.open(map,marker);
    });

  }
</script>
</head>
<body onload="initialize()">
  <div id="map_canvas"></div>
</body>

</html>

Firebug Result:

<!DOCTYPE html>
2
3
4<html>
5<head>
6<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
7<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
8<title>Event on Map</title>
9<link href="http://code.google.com/apis/maps/documentation/javascript/examples/default.css" rel="stylesheet" type="text/css" />
10<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
11<script type="text/javascript" charset="UTF-8">
12 function initialize() {
13 var lat=41.062786;
14 var lng=28.981934;
15 var venue="Ä°Tà Kültür Sanat BirliÄi (KSB) Binası Küçük Salon (Maslak)";
16
17 var myLatlng = new google.maps.LatLng(lat,lng);
18 var myOptions = {
19 zoom: 15,
20 center: myLatlng,
21 mapTypeId: google.maps.MapTypeId.ROADMAP
22 }
23 var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
24
25 var marker = new google.maps.Marker({
26 position: myLatlng,
27 map: map,
28 title:"Hello"
29 });
30
31 var infowindow = new google.maps.InfoWindow({ content: venue, size: new google.maps.Size(50,50)});
32 google.maps.event.addListener(marker, 'click', function() {
33 infowindow.open(map,marker);
34 });
35
36 }
37</script>
38</head>
39<body onload="initialize()">
40 <div id="map_canvas"></div>
41</body>
42
43</html>

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评论（3）

沒落の蓅哖 2024-10-10 07:53:22

GET 查询字符串的解码由 servlet 容器处理，而不是由 Servlet API 处理。目前还不清楚你使用的是哪个servletcontainer，所以我无法给出详细的答案。例如，在 Tomcat 中，它可以通过 URIEncoding 可配置 /conf/server.xml 中 元素中的 属性。

<Connector URIEncoding="UTF-8">

其他 servlet 容器中的配置类似。

然后您可以删除不必要的 URLDecoder 行。 getParameter() 已返回解码后的参数。

另请参阅：

与实际问题无关，我强烈建议用 EL 替换 scriptlet 并使用 JSTL fn:escapeXml 来防止 XSS 攻击。

var lat = ${fn:escapeXml(param.lat)};
var lng = ${fn:escapeXml(param.lng)};
var venue = "${fn:escapeXml(param.venue)}";

另请参阅：

Decoding of the GET query string is handled by the servletcontainer, not by the Servlet API. It's unclear which servletcontainer you're using, so I can't give a detailed answer. In for example Tomcat, it's configureable by URIEncoding attribute in the <Connector> element in /conf/server.xml.

<Connector URIEncoding="UTF-8">

Configuration is similar in other servletcontainers.

Then you can remove the unnecessary URLDecoder line. The getParameter() already returns the decoded parameter.

See also:

Unrelated to the actual problem, I strongly recommend to replace scriptlets by EL and use JSTL fn:escapeXml to prevent XSS attacks.

var lat = ${fn:escapeXml(param.lat)};
var lng = ${fn:escapeXml(param.lng)};
var venue = "${fn:escapeXml(param.venue)}";

See also:

回复 原文
菩提树下叶撕阳。 2024-10-10 07:53:22

您的 JSP 标头是什么样的？

确保它显示如下内容：

<%@ page contentType="text/xhtml;charset=UTF-8"%>

您还可以检查调用 JSP 时获得的 HTTP 标头。确保您的响应是 UTF-8 编码的。

What does your JSP header look like?

Make sure it says something like:

<%@ page contentType="text/xhtml;charset=UTF-8"%>

You can also check HTTP headers you are getting when invoking your JSP. Make sure your response is UTF-8 encoded.

回复 原文
余罪 2024-10-10 07:53:22

也许这个方法覆盖了错误的编码：
request.setCharacterEncoding("UTF-8")

也许您应该检查 JSP 标头或请求标头中要使用的编码。

查理

Maybe this method is overriding the wrong encoding:
request.setCharacterEncoding("UTF-8")

Probably you should check the encoding to be used in your JSP header or in the request header.

Charlie

回复 原文
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