Google地图和标记，JSP [英] Google maps and Markers, JSP
本文介绍了Google地图和标记，JSP的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在使用Java EE开发一个Web应用程序，我想动态地将标记添加到放置在我的JSP页面上的Google地图上，并使用我的数据库中的坐标。我有以下的代码，但我无法找出问题所在。
I am working on a web application with Java EE and I would like to dynamically add markers to the Google map placed on my JSP page with coordinates from my database. I have the following code, but I can't pinpoint the issue
<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/sql" prefix="sql" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html, body{
height:100%;
margin: 0;
padding: 0;
}
#map_canvas{
height:700px;
width: 700px;
}
#map-canvas { height: 100% }
</style>
<sql:setDataSource var="enterdata"
driver="com.mysql.jdbc.Driver"
user="root" password="root"
url="jdbc:mysql://localhost/google_maps" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js? sensor=false"></script>
<script type="text/javascript">
var markers = [
<c:forEach var="s" items="${list.rows}">
[<c:out value="${s.latitude}"/>,<c:out value="${s.longitude}"/>]
</c:forEach> ];
function initialize(){
var latlng = new google.maps.LatLng(markers[0][1],markers[0][2]);
var mapOptions={
zoom: 6, // 0 à 21
center: new google.maps.LatLng(36,5), // centre de la carte
mapTypeId: google.maps.MapTypeId.ROADMAP, // ROADMAP, SATELLITE, HYBRID, TERRAIN
}
var map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
var infowindow = new google.maps.InfoWindow(), marker, i;
for (i = 0; i < markers.length; i++) {
marker = new google.maps.Marker({
position: new google.maps.LatLng(markers[i][1], markers[i][2]),
map: map
});
google.maps.event.addListener(marker, 'click', (function(marker, i) {
return function() {
infowindow.setContent(markers[i][0]);
infowindow.open(map, marker);
}
})(marker, i));
}
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
</head>
<body onload="initialize()">
<div id="map_canvas"></div>
<sql:query var = "users" dataSource="${dataSource}">
select longitude,latitude from map
</sql:query>
<p class="info">${ message }</p>
</body>
</html>
推荐答案
b
$ b
If I understand properly this part
var markers = [
<c:forEach var="s" items="${list.rows}">
[<c:out value="${s.latitude}"/>,<c:out value="${s.longitude}"/>]
</c:forEach>
输出数组中只有2个字段。在这种情况下，用于创建 LatLng 的索引是错误的，应该更改为使用0和1：
there are only 2 fields in output array. In that case indexes used to create LatLng are wrong and should be changed to use 0 and 1:
position: new google.maps.LatLng(markers[i][0], markers[i][1]),
否则，您还必须包含infowindow内容的相关信息。
Otherwise, you will have to include also information for infowindow content.
这篇关于Google地图和标记，JSP的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
查看全文
