Google Local Search API ，本地map搜索 _Web前端

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