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j源码实例2(获取表单参数)

作者:黑客防线网安JSP教程基地 来源:黑客防线网安JSP教程基地 浏览次数:0

本篇关键词:参数获取实例源码
黑客防线网安网讯:package coreservlets;    import java.io.*;  import javax.servlet.*;  import javax.servlet.http.*;  import java.util.*;    /** Shows all the parameters sent to the...
package coreservlets;
  
   import java.io.*;
   import javax.servlet.*;
   import javax.servlet.http.*;
   import java.util.*;
  
   /** Shows all the parameters sent to the servlet via either
   * GET or POST. Specially marks parameters that have
   * no values or multiple values.
   * <P>
   * Taken from Core Servlets and JavaServer Pages
   * from Prentice Hall and Sun Microsystems Press,
   * http://www.coreservlets.com/.
   * &copy; 2000 Marty Hall; may be freely used or adapted.
   */
  
   public class ShowParameters extends HttpServlet {
   public void doGet(HttpServletRequest request,
   HttpServletResponse response)
   throws ServletException, IOException {
   response.setContentType("text/html");
   PrintWriter out = response.getWriter();
   String title = "Reading All Request Parameters";
   out.println(ServletUtilities.headWithTitle(title) +
   "<BODY BGCOLOR="#FDF5E6"> " +
   "<H1 ALIGN=CENTER>" + title + "</H1> " +
   "<TABLE BORDER=1 ALIGN=CENTER> " +
   "<TR BGCOLOR="#FFAD00"> " +
   "<TH>Parameter Name<TH>Parameter Value(s)");
   Enumeration paramNames = request.getParameterNames();
   while(paramNames.hasMoreElements()) {
   String paramName = (String)paramNames.nextElement();
   out.print("<TR><TD>" + paramName + " <TD>");
   String[] paramValues =
   request.getParameterValues(paramName);
   if (paramValues.length == 1) {
   String paramValue = paramValues[0];
   if (paramValue.length() == 0)
   out.println("<I>No Value</I>");
   else
   out.println(paramValue);
   } else {
   out.println("<UL>");
   for(int i=0; i<paramValues.length; i++) {
   out.println("<LI>" + paramValues);
   }
   out.println("</UL>");
   }
   }
   out.println("</TABLE> </BODY></HTML>");
   }
  
   public void doPost(HttpServletRequest request,
   HttpServletResponse response)
   throws ServletException, IOException {
   doGet(request, response);
   }
   }
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