📄 myfind.java
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package com.servlet;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.lucene.analysis.Analyzer;
import org.apache.lucene.analysis.cn.ChineseAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.queryParser.QueryParser;
import org.apache.lucene.search.Hits;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.Query;
public class MyFind extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
this.doPost(request, response);
}
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
String QC = request.getParameter("QueryContent");
if (QC == null) {
QC = "";
} else {
QC = input(QC);
}
response.setContentType("text/html; charset=UTF-8");
PrintWriter out = response.getWriter();
try {
Search(QC, out);
} catch (Exception ex) {
System.out.println(ex.getMessage());
}
}
public void Search(String qc, PrintWriter out) throws Exception {
// 从索引目录创建索引
IndexSearcher _searcher = new IndexSearcher("c:\\news\\index");
// 创建标准分析器
Analyzer analyzer = new ChineseAnalyzer();
// 查询条件
String line = qc;
// Query是一个抽象类
Query query = QueryParser.parse(line, "title", analyzer);
out.println("<html>");
out.println("<head><title>搜索结果</title></head>");
out.println("<body bgcolor=#ffffff>");
out.println("<center>" + "<form action='myFind' method='post'>"
+ "<font face='华文中宋' color='#3399FF'>新闻搜索引擎</font>:"
+ "<input type='text' name='QueryContent' size='20'>"
+ "<input type='submit' name='submit' value='开始搜索'>"
+ "</form></center>");
out.println("<p>搜索关键字：<font color=red>" + query.toString("title")
+ "</font></p>");
Hits hits = _searcher.search(query);
out.println(" 总共找到<font color=red>" + hits.length() + "</font>条新闻<br>");
for (int i = 0; i < hits.length(); i++) {
Document doc = hits.doc(i);
String url = doc.get("url");
if (url != null) {
out.println((i + 1) + " <a href='" + url + "' target=_blank>"
+ replace(doc.get("title"), qc) + "</a><br>");
} else {
System.out.println("没有找到！");
}
}
out.println("</body></html>");
_searcher.close();
}
public String input(String str) {
String temp = null;
if (str != null) {
try {
temp = new String(str.getBytes("ISO8859_1"), "UTF-8");
} catch (Exception e) {
}
}
return temp;
}
public String replace(String title, String keyword) {
return title.replaceAll(keyword, "<font color='red'>" + keyword
+ "</font>");
};
}
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