智能提示框學習記錄 ——結合了lucene全文檢索

時間 2019-11-15

標籤智能提示學習記錄結合 lucene 全文檢索简体版

原文原文鏈接

智能提示框主要使用js語句實現，建議先學習jquery和ajax等js，不然不利於理解本文，可是就算什麼都不會依然能夠用本文程序（附帶源碼，不須要任何修改）javascript

對lucene不熟悉的能夠查看個人另外一篇文章《lucene全文檢索學習記錄》http://my.oschina.net/u/1433614/blog/189885 。css

本文工程源碼http://download.csdn.net/detail/leilovegege/6804937 html

Test.html頁面代碼java

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">jquery

<html>web

<head>ajax

<title>google.html</title>apache

var line = 0;

function del(){

if($("#newDiv")){

$("#newDiv").remove();

line = 0;

}

$(document).ready(function(){

//文本框失去焦點時層消失

$(document.body).click(function(){

del();

});

$(document).keydown(function(){

// 38 上 40下 13 回車

if($("#newDiv")){

if(event.keyCode == 40){

$("table tbody tr").eq(line)

.css("backgroundColor", "blue")

.css("color", "white");

$("table tbody tr").eq(line < 0 ? 0 : line - 1)

.css("backgroundColor", "white")

.css("color", "black");

line = (line == $("table tbody tr").length ? 0 : line + 1);

}else if(event.keyCode == 38){

line = (line == 0 ? $("table tbody tr").length : line - 1);

$("table tbody tr").eq(line)

.css("backgroundColor", "blue")

.css("color", "white");

$("table tbody tr").eq(line > $("table tbody tr").length ? 0 : line + 1)

.css("backgroundColor", "white")

.css("color", "black");

}else if(event.keyCode == 13){

$("#key").val($("table tbody tr").eq(line - 1).find("td").eq(0).html());

del();

}

});

$("#key").bind("propertychange", function(){

del();

var top = $("#key").offset().top;

var left = $("#key").offset().left;

var newDiv = $("<div/>").width($("#key").width() + 6)

.css("position", "absolute")

.css("backgroundColor", "white")

.css("left", left)

.css("top", top + $("#key").height() + 6)

.css("border", "1px solid blue")

.attr("id", "newDiv");

var table = $("<table width='100%'/>")

.attr("cellpadding", "0")

.attr("cellspacing", "0");

$.post("jqueryServlet", {key: $("#key").val()}, function(xml){

$(xml).find("results result").each(function(){

var key = $(this).attr("key");

var count = $(this).attr("count");

var tr = $("<tr/>").css("cursor", "pointer").mouseout(function(){

$(this).css("backgroundColor", "white").css("color", "black");

}).mouseover(function(){

$(this).css("backgroundColor", "blue").css("color", "white");

}).click(function(){

$("#key").val($(this).find("td").eq(0).html());

del();

});

var td1 = $("<td/>").html(key).css("fontSize", "12px")

.css("margin", "5 5 5 5");

var td2 = $("<td/>").html("共有" + count + "個結果")

.attr("align", "right").css("fontSize", "12px")

.css("color", "green").css("margin", "5 5 5 5");

tr.append(td1).append(td2);

table.append(tr);

newDiv.append(table);

});

$(document.body).append(newDiv);

if($("#key").val() == ""){

$("#newDiv").remove();

}

});

</script>

</head>

<body>

請輸入搜索關鍵字:<input name="key" id="key" style="width: 300">

</div>

</body>

</html>

在工程web.xml中添加以下代碼，配置一個servlet

<description>This is the description of my J2EE component</description>

<display-name>This is the display name of my J2EE component</display-name>

<servlet-name>jqueryServlet</servlet-name>

<servlet-class>com.test.jqueryServlet</servlet-class>

</servlet>

<servlet-mapping>

<servlet-name>jqueryServlet</servlet-name>

<url-pattern>/jqueryServlet</url-pattern>

</servlet-mapping>

還有兩個java類

package com.test;

import java.io.IOException;

import java.io.PrintWriter;

import java.util.List;

import javax.servlet.ServletException;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

public class jqueryServlet extends HttpServlet {

public void service(HttpServletRequest request, HttpServletResponse response)

throws ServletException, IOException {

response.setContentType("text/xml;charset=utf-8");

request.setCharacterEncoding("utf-8");

PrintWriter out = response.getWriter();

String key = request.getParameter("key");

List<String> list=null;

if(key!=null&&!key.equals("")){

try {

lucene.create();

list=lucene.search(key);

} catch (Exception e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

System.out.println(key+"----------->");

if(list!=null&&!list.equals("null")){

StringBuilder xml = new StringBuilder();

xml.append("<results>");

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

xml.append("<result key='"+list.get(i)+"' count='"+(list.size()-1)+"' ></result>");

}

xml.append("</results>");

out.print(xml.toString());

}

out.flush();

out.close();

}

package com.test;

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStreamReader;

import java.util.ArrayList;

import java.util.List;

import org.apache.lucene.analysis.Analyzer;

import org.apache.lucene.analysis.standard.StandardAnalyzer;

import org.apache.lucene.document.Document;

import org.apache.lucene.document.Field;

import org.apache.lucene.index.IndexReader;

import org.apache.lucene.index.IndexWriter;

import org.apache.lucene.index.IndexWriterConfig;

import org.apache.lucene.index.IndexWriterConfig.OpenMode;

import org.apache.lucene.queryParser.QueryParser;

import org.apache.lucene.search.IndexSearcher;

import org.apache.lucene.search.Query;

import org.apache.lucene.search.ScoreDoc;

import org.apache.lucene.search.TopDocs;

import org.apache.lucene.store.Directory;

import org.apache.lucene.store.FSDirectory;

import org.apache.lucene.util.Version;

public class lucene{

static String SourceFileStr = "../webapps/search/source" ; //索引源路徑

static List<Document> list=null; //Document爲後面使用準備的，必定是靜態的

//建立索引

public static void create() throws Exception {

File indexDir = new File( "./index/test1" );//索引文件及存放的路徑

Directory dir=FSDirectory.open(indexDir); //存儲方式，FS爲磁盤，RAM爲內存

Analyzer lucenAnalyzer=new StandardAnalyzer(Version.LUCENE_31); //分詞器

IndexWriterConfig iwc=new IndexWriterConfig(Version.LUCENE_31,lucenAnalyzer);

iwc.setOpenMode(OpenMode.CREATE); //點明是建立新的，原有的索引會被覆蓋

IndexWriter indexWriter=new IndexWriter(dir,iwc);

list=new ArrayList<Document>();

add(SourceFileStr);//調用add（）函數，獲取Document

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

indexWriter.addDocument(list.get(i));//將Document寫入索引

}

indexWriter.close();//關閉流

}

//從原文件獲取信息，保存到Document中（實現遍歷目錄下全部文件及子文件夾）

public static void add(String str) throws Exception{

File file = new File( str );

File[] files=file.listFiles();//獲取目錄下的全部文件及文件夾

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

if (files[i].isFile()){//若是是文件，將文件信息讀取出來保存到Document中

String temp=FileReaderAll(files[i].getCanonicalPath(),"GBK");//utf-8

System.out.println(temp);

Field FieldPath=new Field("path",files[i].getPath(),Field.Store.YES,Field.Index.NO);

Field FieldBody=new Field("body",temp,Field.Store.YES,Field.Index.ANALYZED,Field.TermVector.WITH_POSITIONS_OFFSETS);

Document document=new Document();

document.add(FieldPath);

document.add(FieldBody);

list.add(document);

}else{//若是是文件夾，遞歸調用本函數

// add(files[i].getPath());

}

//讀取文件的信息

public static String FileReaderAll(String FileName,String charset)throws IOException{

BufferedReader reader=new BufferedReader(new InputStreamReader(new FileInputStream(FileName),charset));

String line=new String();

String temp=new String();

while ((line=reader.readLine())!=null) {

temp+=line;

}

reader.close();

return temp;

}

//測試創建的索引，實現搜索

public static List<String> search(String str) throws Exception{

List<String> list=new ArrayList<String>();//用於存放搜索結果

String index="./index/test1"; //索引的路徑

IndexReader reader=IndexReader.open(FSDirectory.open(new File(index))); //IndexReader

IndexSearcher searcher=new IndexSearcher(reader); //IndexSearcher

if (searcher!=null) {

Analyzer analyzer=new StandardAnalyzer(Version.LUCENE_31); //分詞器

QueryParser qp=new QueryParser(Version.LUCENE_31,"body",analyzer); //搜索的內容範圍是body（Document）

Query query=qp.parse(str);//搜索關鍵詞

TopDocs results=searcher.search(query, 10);//取前10個搜索結果

ScoreDoc[] hits=results.scoreDocs;

Document document=null;

if (hits.length>0) {

list.add("找到"+hits.length+"條結果");

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

document=searcher.doc(hits[i].doc);

// String body=document.get("body");

String path=document.get("path");

list.add(path);

}

}else

list.add("沒查到結果");

}else{

list.add("沒查找到索引");

}

searcher.close();

reader.close();

return list;

}

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