showsession.java

来自「learning java的源代码。书中每个实例都有相关的代码example。」· Java 代码 · 共 50 行

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//file: ShowSession.javaimport java.io.*;import javax.servlet.ServletException;import javax.servlet.http.*;import java.util.Enumeration;public class ShowSession extends HttpServlet {    public void doPost( HttpServletRequest request,                        HttpServletResponse response)      throws ServletException, IOException {        doGet( request, response );    }    public void doGet(HttpServletRequest request,                      HttpServletResponse response)      throws ServletException, IOException {        response.setContentType("text/html");        PrintWriter out = response.getWriter(  );        out.println(          "<html><head><title>Show Session</title></head><body>");        HttpSession session = request.getSession(  );        out.println("<h1>In this session:</h1><ul>");        String [] names = session.getValueNames(  );        for (int i=0; i< names.length; i++)            out.println(              "<li>"+names[i]+" = "+session.getValue( names[i] ));        // add new name-value to session        String name = request.getParameter("Name");        if ( name != null ) {            String value = request.getParameter("Value");            session.putValue( name, value );        }        out.println(          "</ul><p><hr><h1>Add String</h1>"          + "<form method=\"POST\" action=\""          + request.getRequestURI(  ) +"\">"          + "Name: <input name=\"Name\" size=20><br>"          + "Value: <input name=\"Value\" size=20><br>"          + "<br><input type=\"submit\" value=\"Submit\"></form>"        );        out.close(  );    }}

showsession.java - 源码说明

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