首页 > 代码库 > Java Web学习笔记---用GET实现搜索引擎
Java Web学习笔记---用GET实现搜索引擎
2024-08-29 07:42:40 210人阅读
今天做了一个实验,关于Servlet的.使用GET实现搜索引擎.因自己没有搜索引擎数据库,所以使用了Yahoo提供的Search API.
浏览效果如下图:
现在雅虎推出了新的Search API---BOSS Search API.把旧的也就是我现在用的API废弃了,导致搜索不到结果.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>search.html</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body>
<div align="center">
<img src="http://us.i1.yimg.com/us.yimg.com/i/yahoo.gif" alt="Yahoo!" width="147" height="31" border="0" style="margin: 25px; ">
<div>
<form action="/testServlet/servlet/SearchServlet" method="get">
<input type="radio" name="type" value="web" checked>网页
<input type="radio" name="type" value="news">新闻
<input type="radio" name="type" value="image">图片
<input type="radio" name="type" value="video">视频
<input type="checkbox" name="allowedAdult" value="true">允许成人内容 <br/><br/>
<input type="text" name="word" value="" style="width: 300px; ">
<input type="submit" value="用雅虎搜索" style="width: 100px; ">
</form>
</div>
<div style="margin-top: 50px; ">
© Helloxr 2016-2020
</div>
</div>
</body>
</html>
以上是search.html的代码
下面是Servlet的代码:
package com.helloxr.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.net.URLEncoder;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.yahoo.search.ImageSearchRequest;
import com.yahoo.search.ImageSearchResult;
import com.yahoo.search.ImageSearchResults;
import com.yahoo.search.NewsSearchRequest;
import com.yahoo.search.NewsSearchResult;
import com.yahoo.search.NewsSearchResults;
import com.yahoo.search.SearchClient;
import com.yahoo.search.VideoSearchRequest;
import com.yahoo.search.VideoSearchResult;
import com.yahoo.search.VideoSearchResults;
import com.yahoo.search.WebSearchRequest;
import com.yahoo.search.WebSearchResult;
import com.yahoo.search.WebSearchResults;
public class SearchServlet extends HttpServlet {
private static final long serialVersionUID = 98643567L;
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("UTF-8");
response.setCharacterEncoding("UTF-8");
response.setContentType("text/html");
String word = request.getParameter("word");
String type = request.getParameter("type");
String allowedAdult = request.getParameter("allowedAdult");
boolean adultOk = "true".equals(allowedAdult); // 是否允许成人内容checkbox的特性,若选中,则为"true",否则,为 null.
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>" + word + " 搜索结果</TITLE></HEAD>");
out.println(" <BODY>");
out.println("<div style=‘float:left; heigt:40px; ‘><img src=http://www.mamicode.com/‘http://us.i1.yimg.com/us.yimg.com/i/yahoo.gif‘> ");
out.println("<form action=‘" + request.getRequestURI() + "‘ method=‘get‘>");
out.println(" <div style=‘height:40px; ‘>");
out.println(" <input type=‘radio‘ name=‘type‘ value=http://www.mamicode.com/‘web‘" + (type.equals("web")?"checked":"") + ">网页");
out.println(" <input type=‘radio‘ name=‘type‘ value=http://www.mamicode.com/‘news‘" + (type.equals("news")?"checked":"") + ">新闻");
out.println(" <input type=‘radio‘ name=‘type‘ value=http://www.mamicode.com/‘image‘" + (type.equals("image")?"checked":"") + ">图片");
out.println(" <input type=‘radio‘ name=‘type‘ value=http://www.mamicode.com/‘video‘" + (type.equals("video")?"checked":"") + ">视频");
out.println(" ");
out.println(" <input type=‘checkbox‘ name=‘allowedAdult‘ value=http://www.mamicode.com/‘true‘" + (adultOk?"checked":"" ) + ">允许成人内容 <br/>");
out.println(" <input type=‘text‘ name=‘word‘ value=http://www.mamicode.com/‘" + word + "‘ style=‘width:300px; ‘> <input type=‘submit‘ value=http://www.mamicode.com/‘用雅虎搜索‘ style=‘width:100px; ‘>");
out.println("</div>");
out.println("</form>");
SearchClient client = new SearchClient("javasdktest");
try{
if("image".equals(type)){
ImageSearchRequest searchRequest = new ImageSearchRequest(URLEncoder.encode(word, "UTF-8"));
searchRequest.setAdultOk(adultOk);
searchRequest.setResults(20);
searchRequest.setStart(BigInteger.valueOf(0));
double startTime = System.currentTimeMillis();
ImageSearchResults results = client.imageSearch(searchRequest);
double endTime = System.currentTimeMillis();
out.println("<div align=right style=‘width:100%; background:#FFDDDD; height:25px; padding:2px; border-top:1px; solid #FF9999; margin-bottom:5px; ‘>");
out.println(" 总共 " + results.getTotalResultsAvailable() + "条数据, 总用时 " + (endTime - startTime) / 1000 + " 秒. ");
out.println("</div>");
for(ImageSearchResult result : results.listResults()){
out.println("<div class=‘imgDiv‘>");
out.println(" <div align=‘center‘><a href=http://www.mamicode.com/‘" + result.getClickUrl() + "‘ target=_blank><img width=160 height=120 src=http://www.mamicode.com/"" + result.getThumbnail().getUrl() + "\" border=‘0‘></a></div>");
out.println(" <div align=‘center‘><a href=http://www.mamicode.com/"" + result.getRefererUrl() + "\" target=_blank>" + result.getTitle() + "</a></div>");
out.println(" <div align=‘center‘>" + result.getWidth() + "x" + result.getHeight() + " " + result.getFileFormat() + "</div>");
out.println(" <div>" + (result.getSummary() == null ? "" : result.getSummary()) + "</div>");
out.println("</div>");
}
}else if("web".equals(type)){
WebSearchRequest searchRequest = new WebSearchRequest(URLEncoder.encode(word, "UTF-8"));
// 是否显示成人内容
searchRequest.setAdultOk(adultOk);
// 查询记录数
searchRequest.setResults(20);
// 从第 0 条记录开始显示
searchRequest.setStart(BigInteger.valueOf(0));
double startTime = System.currentTimeMillis();
WebSearchResults results = client.webSearch(searchRequest);
double endTime = System.currentTimeMillis();
out.println("<div align=right style=‘width:100%; background: #FFDDDD; height:25px; padding:2px; border-top:1px solid #FF9999; margin-bottom:5px; ‘>");
out.println(" 总共 " + results.getTotalResultsAvailable() + " 条数据，总用时 " + ( endTime - startTime )/1000 + " 秒。");
out.println("</div>");
for(WebSearchResult result : results.listResults()){
out.println("<div style=‘margin:8px; width:500px; ‘>");
out.println(" <div><a href=http://www.mamicode.com/"" + result.getClickUrl() + "\" target=_blank><b>" + result.getTitle() + "</b></a> 文件格式：" + result.getMimeType() + "</div>");
out.println(" <div>网址：<a href=http://www.mamicode.com/"" + result.getUrl() + "\" target=_blank>" + result.getUrl() + "</a></div>");
out.println(" <div>" + result.getSummary() + (result.getCache()==null ? "" : " [<a href=http://www.mamicode.com/"" + result.getCache().getUrl() + "\" target=_blank>网页快照</a>]") +"</div>");
out.println("</div>");
}
}
else if("news".equals(type)){
NewsSearchRequest searchRequest = new NewsSearchRequest(URLEncoder.encode(word, "UTF-8"));
// 是否显示成人内容
// searchRequest.setAdultOk(adultOk);
// 查询记录数
searchRequest.setResults(20);
// 从第 0 条记录开始显示
searchRequest.setStart(BigInteger.valueOf(0));
double startTime = System.currentTimeMillis();
NewsSearchResults results = client.newsSearch(searchRequest);
double endTime = System.currentTimeMillis();
out.println("<div align=right style=‘width:100%; background: #FFDDDD; height:25px; padding:2px; border-top:1px solid #FF9999; margin-bottom:5px; ‘>");
out.println(" 总共 " + results.getTotalResultsAvailable() + " 条数据，总用时 " + ( endTime - startTime )/1000 + " 秒。");
out.println("</div>");
for(NewsSearchResult result : results.listResults()){
out.println("<div style=‘margin:8px; width:500px; ‘>");
out.println(" <div><a href=http://www.mamicode.com/"" + result.getClickUrl() + "\" target=_blank><b>" + result.getTitle() + "</b></a></div>");
out.println(" <div>网址：<a href=http://www.mamicode.com/"" + result.getUrl() + "\" target=_blank>" + result.getUrl() + "</a></div>");
out.println(" <div>" + result.getSummary() + "</div>");
out.println("</div>");
}
}
else if("video".equals(type)){
VideoSearchRequest searchRequest = new VideoSearchRequest(URLEncoder.encode(word, "UTF-8"));
// 是否显示成人内容
searchRequest.setAdultOk(adultOk);
// 查询记录数
searchRequest.setResults(20);
// 从第 0 条记录开始显示
searchRequest.setStart(BigInteger.valueOf(0));
double startTime = System.currentTimeMillis();
VideoSearchResults results = client.videoSearch(searchRequest);
double endTime = System.currentTimeMillis();
out.println("<div align=right style=‘width:100%; background: #FFDDDD; height:25px; padding:2px; border-top:1px solid #FF9999; margin-bottom:5px; ‘>");
out.println(" 总共 " + results.getTotalResultsAvailable() + " 条数据，总用时 " + ( endTime - startTime )/1000 + " 秒。");
out.println("</div>");
for(VideoSearchResult result : results.listResults()){
out.println("<div class=‘imgDiv‘>");
out.println(" <div align=‘center‘><a href=http://www.mamicode.com/"" + result.getClickUrl() + "\" target=_blank><img width=160 height=120 src=http://www.mamicode.com/"" + result.getThumbnail().getUrl() + "\" border=‘0‘></a></div>");
out.println(" <div align=‘center‘><a href=http://www.mamicode.com/"" + result.getRefererUrl() + "\" target=_blank>" + result.getTitle() + "</a></div>");
out.println(" <div align=‘center‘>" + result.getWidth() + "x" + result.getHeight() + " " + result.getFileFormat() + "</div>");
out.println(" <div>" + (result.getSummary()==null ? "" : result.getSummary()) + "</div>");
out.println("</div>");
}
}
}catch(Exception e){
e.printStackTrace();
}
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
}
Java Web学习笔记---用GET实现搜索引擎
声明：以上内容来自用户投稿及互联网公开渠道收集整理发布，本网站不拥有所有权，未作人工编辑处理，也不承担相关法律责任，若内容有误或涉及侵权可进行投诉：
投诉/举报 工作人员会在5个工作日内联系你，一经查实，本站将立刻删除涉嫌侵权内容。
