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servlet经典1,表单提交接受

<web-app>
 <servlet>
  <servlet-name>FirstServlet</servlet-name>
  <servlet-class>servlet.study3.c1.FirstServlet</servlet-class>
 </servlet>
 <servlet-mapping>
  <servlet-name>FirstServlet</servlet-name>
  <url-pattern>/firstservlet</url-pattern>
 </servlet-mapping>
</web-app>

package servlet.study3.c1;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.PrintWriter;
import java.io.IOException;
import java.util.*;

public class FirstServlet extends HttpServlet{
    public void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException,IOException{
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        out.println("<html><head>");
        out.println("<title>Help Page</title></head><body>");
        out.println("<h2>Please submit your information</h2>");
        out.println("<form method='post' action='/jsp/firstservlet'>");
          out.println("<table width=\"400\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">");
        out.println("<tr>");
        out.println("<td>Your First name: </td>");
        out.println("<td><input type=\"text\" name=\"firstname\"></td>");
        out.println("</tr>");
        out.println("<tr>");
        out.println("<td>Your Last name:</td>");
        out.println("<td><input type=\"text\" name=\"lastname\"></td>");
        out.println("</tr>");
        out.println("<tr>");
        out.println("<td>Your email: </td>");
        out.println("<td><input type=\"text\" name=\"email\"></td>");
        out.println("</tr>");
          out.println("</table>");
        out.println("<br>");
          out.println("<input type=\"submit\" name=\"Submit\" value=\"submit\">");
        out.println("</form>");
        out.println("</body></html>");
    }
    
    public void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException,IOException{
        Enumeration paramNames = request.getParameterNames();
        String parName;
        boolean emptyEnum = false;
        if(!paramNames.hasMoreElements())
            emptyEnum = true;
            
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        
        out.println("<html><head>");
        out.println("<title>Submitted Parameters</title></head><body>");
        if(emptyEnum){
            out.println("<h2>Sorry, the request does net contain any parameters</h2>");
        }else{
            out.println("<h2>Here are the submitted parameter values</h2>");
        }
        while(paramNames.hasMoreElements()){
            parName = (String)paramNames.nextElement();
            out.println("<strong>" + parName + "</strong> :" + request.getParameter(parName));
            out.println("<br>");
        }
        out.println("</body></html>");
    }
}
posted on 2005-11-11 23:13 方佳玮 阅读(1314) 评论(0)  编辑  收藏 所属分类: Servlet

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