📄 exercise26_6.java

📁 java程序设计导论（daniel liang著）所有偶数课后习题答案

💻 JAVA

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import javax.servlet.*;import javax.servlet.http.*;import java.io.*;import java.util.*;public class Exercise26_6 extends HttpServlet {  private static final String CONTENT_TYPE = "text/html";  /**Process the HTTP Get request*/  public void doGet(HttpServletRequest request, HttpServletResponse    response) throws ServletException, IOException {    response.setContentType(CONTENT_TYPE);    PrintWriter out = response.getWriter();    out.println("<html>");    out.println("<head><title>Exercise26_6</title></head>");    out.println("<body>");    String course = request.getParameter("course");    String ssn = request.getParameter("ssn");    BufferedReader in = null;    boolean found = false;    try {      in = new BufferedReader(new FileReader(        "c:\\exercise\\" + course + ".txt"));      String line;      while ( (line = in.readLine()) != null) {        StringTokenizer st = new StringTokenizer(line, "#\n\r\t");        String name = st.nextToken();        String ssnFromFile = st.nextToken();        String score = st.nextToken();        System.out.println(name + " " + ssnFromFile + " " + score);        if (ssn.equals(ssnFromFile)) {          out.print(name + " " + score);          found = true;          break;        }      }      if (!found) {        out.print(ssn + " not found in " + course);      }      out.println("</body></html>");    }    catch (Exception ex) {      out.println(ex.toString());      ex.printStackTrace();    }    finally {      try {        if (in != null) in.close();        if (out != null) out.close();      }      catch (Exception ex) { }    }  }  /**Clean up resources*/  public void destroy()  {  }}

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