import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStreamReader; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @WebServlet("/HighLight") public class HighLight extends HttpServlet { @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html; charset=UTF-8"); PrintWriter out = response.getWriter(); out.println("
");
        // 適当な Java のソースファイル(例えば HighLight.java のコピー)
        // を WEB アプリのルートフォルダに Tekito.txt 
        // という名前で置いておくこと
        File f = new File(getServletContext().getRealPath("/Tekito.txt"));
        String word = request.getQueryString();
        InputStreamReader fr = new InputStreamReader
                (new FileInputStream(f), "UTF-8");
        BufferedReader in = new BufferedReader(fr);

        while(true) {
            String line = in.readLine();
            if (line == null) break;
            line = line.replace("&", "&");
            line = line.replace("<", "<");
            line = line.replace(">", ">");

            if (word != null && word.length() != 0) {
                line = line.replace(word, 
                                    "" + word + "");
            }
            out.println(line);
        }
        out.println("
"); out.close(); in.close(); } }