一尘不染

JSP的get方法中的参数解码问题

jsp

这里如何调用jsp页面。

eventMap.jsp?venue=%C4%B0ndigo

这是eventMap.jsp中的行,我获得了场地参数:

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";

如何正确地在jsp页面中使用编码,以便正确获取解码值(İngido)。

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>

萤火虫结果:

<!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>

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2020-06-10

共1个答案

一尘不染

GET查询字符串的解码是由servlet容器而不是Servlet
API处理的。目前尚不清楚您使用的是哪个servlet容器,因此我无法给出详细的答案。例如在Tomcat中,它可以通过URIEncoding中的<Connector>元素中的属性进行配置/conf/server.xml

<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。该getParameter()已返回解码参数。

也可以看看:


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

var lat = ${fn:escapeXml(param.lat)};
var lng = ${fn:escapeXml(param.lng)};
var venue = "${fn:escapeXml(param.venue)}";
2020-06-10