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在Java中检索Google的搜索结果

王朝java/jsp·作者佚名  2006-01-09
窄屏简体版  字體: |||超大  

客户端的JavaScript:

<script language="javascript">

var theURL = "/examples/servlet/MyGoogleSearchServlet?search=";

var http = getHTTPObject();

function handleHttpResponse() {

if (http.readyState == 4) {

GoogleSearchResults.innerHTML = http.responseText;

}

}

function updateGoogleResults(formElement) {

var searchQuery = document.forms[0].elements[formElement].value;

http.open("GET", theURL + escape(searchQuery), true);

http.onreadystatechange = handleHttpResponse;

http.send(null);

}

function getHTTPObject() {

var xmlhttp;

try {

xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");

} catch (e) {

try {

xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");

} catch (E) {

xmlhttp = false;

}

}

if (!xmlhttp && typeof XMLHttpRequest != 'undefined') {

try {

xmlhttp = new XMLHttpRequest();

} catch (e) {

xmlhttp = false;

}

}

return xmlhttp;

}

</script>

__________________________________________________________________________

服务器端的:MyGoogleSearchServlet

import java.io.IOException;

import java.io.PrintWriter;

import java.util.ArrayList;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

/**

* Search Google.

*

* @author Jose Sandoval

*/

public class MyGoogleSearchServlet extends HttpServlet {

/**

* Do get.

*

* @param request HttpServletRequest

* @param response HttpServletResponse

* @throws ServletException, IOExeption

*/

public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

PrintWriter out = response.getWriter();

StringBuffer resultBuffer = new StringBuffer();

ArrayList results = MyGoogleSearch.doSearch(request.getParameter("search"));

SearchResultBean resultBean = null;

for (int i = 0; i<results.size(); i++) {

resultBean = (SearchResultBean) results.get(i);

resultBuffer.append("<a href=").append(resultBean.getURL()).append(">").append(resultBean.getTitle()).append("</a>");

resultBuffer.append("<br>");

resultBuffer.append(resultBean.getSnippet());

resultBuffer.append("<br>").append("<br>");

}

response.setContentType("text/html");

response.setHeader("Pragma", "no-cache");

response.setHeader("Expires", "0");

response.setHeader("Cache-Control", "no-store");

out.print(resultBuffer.toString());

out.close();

}

}

__________________________________________________________________________

服务器端的:MyGoogleSearch

import java.io.IOException;

import java.util.ArrayList;

import com.google.soap.search.GoogleSearch;

import com.google.soap.search.GoogleSearchFault;

import com.google.soap.search.GoogleSearchResult;

import com.google.soap.search.GoogleSearchResultElement;

/**

* GoogleSearch.

*

* @author Jose Sandoval

*/

public class MyGoogleSearch {

private static String CLIENT_KEY = "YOU_HAVE_TO_GET_YOUR_OWN_KEY_FROM_GOOGLE";

/**

* Search Google.

*

* @param queryString String

* @return ArrayList Contains SimpleSearchResult

* @throws IOException

*/

public static ArrayList doSearch(String queryString) throws IOException {

ArrayList searchResults = new ArrayList();

GoogleSearch search = new GoogleSearch();

search.setKey(CLIENT_KEY);

try {

search.setQueryString(queryString.trim());

GoogleSearchResult results = search.doSearch();

GoogleSearchResultElement[] resultElements = results.getResultElements();

for (int i = 0; i<resultElements.length; i++) {

searchResults.add(new SearchResultBean(resultElements[i].getTitle(), resultElements[i].getURL(), resultElements[i].getSnippet()));

}

} catch (GoogleSearchFault f) {

throw new IOException("The call to the Google Web APIs failed: " + f.getMessage());

} catch (Exception e) {

throw new IOException("Thread Problem.");

}

return searchResults;

}

}

__________________________________________________________________________

返回搜索结果的Bean:SearchResultBean

/**

* Result's Bean.

*

* @author Jose Sandoval

*/

public class SearchResultBean {

private String title;

private String URL;

private String snippet;

public SearchResultBean(String title, String URL, String summary) {

super();

this.title = title;

this.URL = URL;

this.snippet = summary;

}

public String getTitle() {

return title;

}

public void setTitle(String title) {

this.title = title;

}

public String getURL() {

return URL;

}

public void setURL(String url) {

URL = url;

}

public String getSnippet() {

return snippet;

}

public void setSnippet(String summary) {

this.snippet = summary;

}

}

来自:辣妹子社区-Java技术论坛

 
 
 
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