使用谷歌自定义搜索API的Java代码

Question

任何人都可以分享一些Java代码开始使用谷歌搜索API.我在互联网上搜索但没有找到任何适当的文档或良好的示例代码.我找到的代码似乎没有工作.如果有人,我会感激的可以帮助我.(我已经获得了API密钥和自定义搜索引擎ID).

谢谢.

Answer 1

我已经更改了while loop@Zakaria上面提供的代码.它可能不是一种正确的解决方法,但它会为您提供谷歌搜索的结果链接.您只需要解析输出.看这里,

public static void main(String[] args) throws Exception {

    String key="YOUR KEY";
    String qry="Android";
    URL url = new URL(
            "https://www.googleapis.com/customsearch/v1?key="+key+ "&cx=013036536707430787589:_pqjad5hr1a&q="+ qry + "&alt=json");
    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setRequestMethod("GET");
    conn.setRequestProperty("Accept", "application/json");
    BufferedReader br = new BufferedReader(new InputStreamReader(
            (conn.getInputStream())));

    String output;
    System.out.println("Output from Server .... \n");
    while ((output = br.readLine()) != null) {

        if(output.contains("\"link\": \"")){                
            String link=output.substring(output.indexOf("\"link\": \"")+("\"link\": \"").length(), output.indexOf("\","));
            System.out.println(link);       //Will print the google search links
        }     
    }
    conn.disconnect();                              
}

希望它也适合你.

Answer 2

对于需要使用Google库的自定义搜索API工作示例的任何人,您都可以使用以下方法:

public static List<Result> search(String keyword){
    Customsearch customsearch= null;


    try {
        customsearch = new Customsearch(new NetHttpTransport(),new JacksonFactory(), new HttpRequestInitializer() {
            public void initialize(HttpRequest httpRequest) {
                try {
                    // set connect and read timeouts
                    httpRequest.setConnectTimeout(HTTP_REQUEST_TIMEOUT);
                    httpRequest.setReadTimeout(HTTP_REQUEST_TIMEOUT);

                } catch (Exception ex) {
                    ex.printStackTrace();
                }
            }
        });
    } catch (Exception e) {
        e.printStackTrace();
    }
    List<Result> resultList=null;
    try {
        Customsearch.Cse.List list=customsearch.cse().list(keyword);
        list.setKey(GOOGLE_API_KEY);
        list.setCx(SEARCH_ENGINE_ID);
        Search results=list.execute();
        resultList=results.getItems();
    }
    catch (  Exception e) {
        e.printStackTrace();
    }
    return resultList;
}

此方法返回结果列表对象,因此您可以迭代它

    List<Result> results = new ArrayList<>();

    try {
        results = search(QUERY);
    } catch (Exception e) {
        e.printStackTrace();
    }
    for(Result result : results){
        System.out.println(result.getDisplayLink());
        System.out.println(result.getTitle());
        // all attributes:
        System.out.println(result.toString());
    }

您已经注意到,您必须定义自定义GOOGLE_API_KEY,SEARCH_ENGINE_ID,QUERY和HTTP_REQUEST_TIMEOUT,即

private static final int HTTP_REQUEST_TIMEOUT = 3 * 600000;

我使用gradle依赖:

dependencies {
compile 'com.google.apis:google-api-services-customsearch:v1-rev57-1.23.0'
}