Google Local Search API ，本地地图搜索
Google 提供了一个基于javascript的本地搜索的API，我们可以通过这个API来嵌入到我们的应用程序中，实现搜索的功能。如javascrtip,Flash,java等。
此接口返回的数据为JSON格式的数据，可以方便进行解析。
Google Local Search API首页地址是：
http://code.google.com/intl/zh-CN/apis/maps/documentation/localsearch/index.html
以下是一个简单的例子：
<DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>Google Search API Sample</title>
<script src="http://www.google.com/jsapi?key=INSERT-YOUR-KEY"></script>
<script type="text/javascript">
// This code generates a "Raw Searcher" to handle search queries. The Raw Searcher requires
// you to handle and draw the search results manually.
google.load('search', '1');
var localSearch;
function searchComplete() {
// Check that we got results
document.getElementById('content').innerHTML = '';
if (localSearch.results && localSearch.results.length > 0) {
for (var i = 0; i < localSearch.results.length; i++) {
// Create HTML elements for search results
var p = document.createElement('p');
var a = document.createElement('a');
var b = document.createElement('b');
var c = document.createElement('c');
a.href = localSearch.results[i].url;
a.innerHTML = localSearch.results[i].title;
b.innerHTML = "<br>" +
localSearch.results[i].streetAddress;
c.innerHTML = "<br>" +
localSearch.results[i].city + "," +
localSearch.results[i].region;
// Append search results to the HTML nodes
p.appendChild(a);
p.appendChild(b);
p.appendChild(c);
document.body.appendChild(p);
}
}
}
function onLoad() {
// Create a LocalSearch instance.
localSearch = new google.search.LocalSearch();
// Set the Local Search center point
localSearch.setCenterPoint("New York, NY");
// Set searchComplete as the callback function when a search is complete. The
// localSearch object will have results in it.
localSearch.setSearchCompleteCallback(this, searchComplete, null);
// Specify search quer(ies)
localSearch.execute('coffee New York NY');
// Include the required Google branding.
// Note that getBranding is called on google.search.Search
google.search.Search.getBranding('branding');
}
// Set a callback to call your code when the page loads
google.setOnLoadCallback(onLoad);
</script>
</head>
<body style="font-family: Arial;border: 0 none;">
<div id="branding" style="float: left;"></div><br />
<div id="content">Loading...</div>
</body>
</html>
其中最重要的是调用这个地址：
http://ajax.googleapis.com/ajax/services/search/local?v=1.0&q=Palm%20Springs%20CA
两个必须的参数如下：
v:版本号，如1.0
q:搜索的关键字
还有一些其它常可以用到的参数：
key：搜索的时候，需要验证的key值，这个你必须到google上去申请
sll：中心坐标，你可以指定一个坐标为中心进行搜索
rsz：每页显示几条数据，值为1－8，当然，每次搜索最大记录数为64
我们来看看常见的几种语言是如何来使用的：
使用Flash
var service:HTTPService = new HTTPService();
service.url = 'http://ajax.googleapis.com/ajax/services/search/local';
service.request.v = '1.0';
service.request.q = 'Palm%20Springs%20CA';
service.request.key = 'INSERT-YOUR-KEY';
service.resultFormat = 'text';
service.addEventListener(ResultEvent.RESULT, onServerResponse);
service.send();
private function onServerResponse(event:ResultEvent):void {
try {
var json:Object = JSON.decode(event.result as String);
// now have some fun with the results...
} catch(ignored:Error) {
}
}
使用Java
URL url = new URL("http://ajax.googleapis.com/ajax/services/search/local?" +
"v=1.0&q=barack%20obama&key=INSERT-YOUR-KEY&userip=INSERT-USER-IP");
URLConnection connection = url.openConnection();
connection.addRequestProperty("Referer", /* Enter the URL of your site here */);
String line;
StringBuilder builder = new StringBuilder();
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
while((line = reader.readLine()) != null) {
builder.append(line);
}
JSONObject json = new JSONObject(builder.toString());
// now have some fun with the results...
使用PHP
$url = "http://ajax.googleapis.com/ajax/services/search/local?" + "v=1.0&q=barack%20obama&key=INSERT-YOUR-KEY&userip=INSERT-USER-IP"; // sendRequest // note how referer is set manually $ch = curl_init(); curl_setopt($ch, CURLOPT_URL, $url); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_REFERER, /* Enter the URL of your site here */); $body = curl_exec($ch); curl_close($ch); // now, process the JSON string $json = json_decode($body); // now have some fun with the results...
今天先介绍到这里，以后我会更详细的进行简介一下。
下面是我用Flex做的一个示例，结合了Google Map，支持关键字搜索，并可以导出结果。
再次申明，程序只用于学习使用，请不要用于商业 。需要安装Flash AIR
下载地址是：http://files.cnblogs.com/liongis/GMapLocalSearch.rar
本文转自：http://www.cnblogs.com/liongis/archive/2011/03/01/1967593.html