JSP全文搜索

最新推荐文章于 2023-08-16 09:10:10 发布

转载最新推荐文章于 2023-08-16 09:10:10 发布 · 64 阅读

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/shosky/archive/2011/06/15/2081247.html

本文介绍了一个基于Java的新闻搜索功能实现方法，通过读取文件内容并利用正则表达式进行关键词匹配，完成对新闻列表的有效筛选。

Action:

private String keyWord = null;
    private Vector news = new Vector();

    public void list() throws ServletException, IOException{
        keyWord = getParameter("keys");
        String fileName = null;
        String path = Config.getProperty(Keys.CONFIG_APPLICATION_PATH) + "/"
        + Config.getProperty(Keys.NEWS_PATH_CONTEXT);

        CompnewsDAO dao = SuperDAO.getInstance().newCompnewsDAO();
        List<Compnews> cnList = dao.selectAll();
        for(Iterator iter = cnList.iterator() ; iter.hasNext();){
            Compnews cn = (Compnews)iter.next();
            String title = cn.getTitle();
            String ytitle = cn.getYtitle();
            String ftitle = cn.getFtitle();
            String cdate = cn.getCdate();
            String compnewsid = cn.getCompnewsid();
            String showtxt = cn.getTxtContent();
            String zmedia = cn.getZmedia();

            fileName = path+"/"+compnewsid;
            //FileReader 读
            //BufferedReader 可以按行读
            BufferedReader mybufferReader = new BufferedReader(new InputStreamReader(new FileInputStream(fileName),"UTF-8"));
            String myString = "";
            String resultString = new String();
            while((myString=mybufferReader.readLine())!=null){
                resultString = resultString+myString;
            }
            mybufferReader.close();

            String searchString = "1";
            Pattern p = null;
            Matcher m = null;
            p = Pattern.compile(keyWord);
            m = p.matcher(resultString);
            if(!m.find()){
                searchString = "0";
            }
            if(searchString.equals("1")){
                Compnews cn0 = new Compnews();
                cn0.setCdate(cdate);
                cn0.setCompnewsid(compnewsid);
                cn0.setFtitle(ftitle);
                cn0.setTitle(title);
                cn0.setTxtContent(showtxt);
                cn0.setYtitle(ytitle);
                cn0.setZmedia(zmedia);
                news.addElement(cn0);
            }
        }

        getRequest().setAttribute("keyWord", keyWord);
        getRequest().setAttribute("searchNewsList", news);
        getRequest().getRequestDispatcher("/news/search_news.jsp").forward(getRequest(), getResponse());
    }

JSP：

<%
    String path = request.getContextPath();
    Vector news =(Vector) request.getAttribute("searchNewsList");
    String keyWord =(String) request.getAttribute("keyWord");
%>

<%
                                        if(!news.isEmpty()){
                                        for(int i = 0 ; i < news.size() ; i ++){
                                        Compnews cn = (Compnews)news.get(i);
%>

转载于:https://www.cnblogs.com/shosky/archive/2011/06/15/2081247.html